Acilius fraternus (Harris)
Acilius mediatus (Say)
Acilius semisulcatus (Aube) MI.
Acilius sulcatus L.
Acilius sylvanus Hill. MI.
Agabetes acuductus (Harris) MI.
Agabus aeruginosus Aubex MI.
Agabus affinis Payk.
Agabus ajax Fall.
Agabus amaroides Sharp
Agabus ambiguus (Say) MI.
Agabus americanus Aube
Agabus amplus Fall.
Agabus antennatus Leech
Agabus anthracinus Mann. MI.
Agabus apache Young
Agabus approximatus Fall.
Agabus arcticus Payk.
Agabus audeni Wallis
Agabus austini Sharp
Agabus bicolor Kirby
Agabus bifarius Kirby MI.
Agabus bipunctularis
Agabus bipustulatus L.
Agabus bjorkmanni Hatch
Agabus brevicollis LeC.
Agabus bryanti Carr
Agabus canadensis Fall.
Agabus chalconotus Panz.
Agabus clavatus LeC.
Agabus confertus LeC.
Agabus confinis Gyll. MI.
Agabus confusus (Blatch.)
Agabus congener Thunb.
Agabus continis (Gyll.)
Agabus cordatus LeC.
Agabus didymus Oliv.
Agabus discolor (Harris) MI.
Agabus discors LeC.
Agabus disintegratus Cr. MI.
Agabus erichsoni G. & H. MI.
Agabus erythropterus Say
Agabus gagetes Aube MI.
Agabus glabrellus Mors.
Agabus griseipennis LeC.
Agabus guttatus Payk.
Agabus hypomelas Mann.
Agabus ilybiformis (Zimm.)
Agabus infuscatus Aube
Agabus inscriptus (Crotch)
Agabus johannis Fall.
Agabus labiatus Brohm
Agabus lecontei Cr.
Agabus lugens LeC.
Agabus lutosus (Crotch)
Agabus minnesotensis Wallis
Agabus moestus (Fab.)
Agabus morosus LeC.
Agabus nebulosus Forst.
Agabus nectris Leach
Agabus nigroaeneus Er.
Agabus obliteratus LeC.
Agabus oblongulus Fall.
Agabus obsoletus LeC. MI.
Agabus obtusatus (Say)
Agabus ontarionis Fall.
Agabus paludosus Fab.
Agabus pandurus Leech
Agabus phaeopterus Kirby MI.
Agabus pisobius Leech
Agabus punctatus Melsh.
Agabus punctulatus Aube MI.
Agabus reticulatus
Agabus scapularis Mann. MI.
Agabus semipunctatus Kby. MI.
Agabus semivittatus LeC. MI.
Agabus seriatus Say MI.
Agabus smithi Brown
Agabus spinipes Sharp
Agabus stagninus Say
Agabus stridulator Sharp
Agabus strigulosus Crotch
Agabus sturmi Schoen.
Agabus subfuscatus Sharp MI.
Agabus taenioloatus Harr.
Agabus tristis Aube
Agabus triton Fall.
Agabus undulatus Schrank.
Agabus vancouverensis Leach
Agabus vandykei Leach
Agabus verus Brown
Agabus spp.
Agaparamorphus opalinus Zimm.
Agaporus difformis LeC.
Aglymbus bromeliarum Scott
Amarodytes testaceopictus Regt.
Ancaena bipustulata Marsham
Ancaena limbata (Fab.) MI.
Anodocheilus elenaurae Young
Anodocheilus elizabethae Young
Anodocheilus exiguus (Aube)
Anodocheilus francescae Young
Anodocheilus germanus (Sharp)
Anodocheilus guatemalensis Zait.
Anodocheilus janae Young
Anodocheilus maculatus Babt.
Anodocheilus oramae Young
Anodocheilus ruthae Young
Anodocheilus sarae Young
Anodocheilus silvestri (Regt.)
Anodocheilus villae Young
Anodocheilus spp.
Bidessodes charaxinus Young
Bidessodes fragilis Regt.
Bidessodes franki P.J. Spangler
Bidessonotus browneanus J.B.-Brown
Bidessonotus championi J.B.-Brown
Bidessonotus inconspicuus (LeC.) MI.
Bidessonotus longovalis Blatch.
Bidessonotus melanocephala Regt.
Bidessonotus mexicanus Regt.
Bidessonotus obtusatus Regt.
Bidessonotus ploterus Young
Bidessonotus pulicarius (Aube)
Bidessonotus rubellus Young
Bidessonotus sobrinus J.B.-Browne
Bidessonotus subsericeus (Blatch.)
Bidessonotus truncatus J.B.-Browne
Bidessonotus vicinus J.B.-Browne
Bidessonotus spp.
Bidessus affinis (Say) MI.
Bidessus amandus LeC.
Bidessus cantralli Young MI.
Bidessus cinctellus LeC.
Bidessus decoratus Fall.
Bidessus flavicollis (LeC.) MI.
Bidessus fuscatus (Crotch) MI.
Bidessus germinus Fab.
Bidessus granarius (Aube) MI.
Bidessus hobbsi Young
Bidessus inflatus Young
Bidessus lacustris (Say) MI.
Bidessus ornatellus Fall.
Bidessus pictodes Sharp
Bidessus pullus (LeC.)
Bidessus quadripustulatus Fall.
Bidessus rogersi Young
Bidessus subtilis LeC.
Bidessus suburbanus Fall.
Bidessus spp.
Brachyvatus acuminatus (Clark)
Brachyvatus apicatus (Clark)
Brachyvatus borrei (Sharp)
Brachyvatus seminulum (LeC.)
Brachyvatus spp.
Celina aculasta Aube
Celina angustata Aube
Celina contiger Guignot
Celina debilis Sharp
Celina grossula (LeC.)
Celina hubbelli Young MI.
Celina imitatrix Young
Celina intacta Zimm.
Celina latipes (Brulle)
Celina occidentalis Young
Celina palustris Young
Celina reclusa Guignot
Celina slossoni Mutch.
Celina spp.
Colpius inflatus LeC.
Colymbetes exaratus LeC.
Colymbetes fuscus L.
Colymbetes longulus LeC.
Colymbetes paykuli Er.
Colymbetes rugipennis Sharp
Colymbetes seminiger LeC.
Colymbetes sculptilis Harris MI.
Colymbetes sculpticilis Harris MI.
Colymbetes strigatus LeC.
Colymbetes spp.
Copelatus biformis Sharp
Copelatus blatchleyi Young
Copelatus caelatipennis Aube
Copelatus chevrolati Aube
Copelatus darlingtoni Young
Copelatus debilis Sharp
Copelatus fragilis Sharp
Copelatus glyphicus Say MI.
Copelatus 11-striatus Aube
Copelatus impressicollis Sharp
Copelatus inornatus Sharp
Copelatus insolitus Chev.
Copelatus integer Sharp
Copelatus laccophilinus Sharp
Copelatus longicornis Sharp
Copelatus montivagus Young
Copelatus punctulatus Aube
Copelatus neglectus Sharp
Copelatus schaefferi Young
Copelatus strigipennis LaP.
Copelatus sulcatus Sharp
Coptotomus interrogatus (Fab.) MI.
Coptotomus lenticus Hilsen. MI.
Coptotomus longulus LeC. MI.
Coptotomus loticus Hilsen.
Coptotomus serripalpus Say
Coptotomus venustus (Say)
Coptotomus spp.
Cryptopleurum minutum (Fab.)
Cryptopleurum subtile Sharp
Cybister ellipticus LeC.
Cybister explanatus LeC.
Cybister fimbriolatus Say MI.
Cybister oliveri Crotch
Cybister spp.
Cymatopterus sp.
Derallus altus (LeC.)
Derallus spp.
Deronectes addendus Fab.
Deronectes aequinotalis (Clark)
Deronectes coelamboides Fall.
Deronectes corvinus Sharp.
Deronectes depressus (Fab.)
Deronectes eximius (Motsch.)
Deronectes expositus Fall.
Deronectes funereus (Crotch)
Deronectes gilensis Zimm.
Deronectes grammicus Sharp
Deronectes griseostriatus (DeG.) MI.
Deronectes opaculus Sharp
Deronectes panaminti Fall.
Deronectes roffi (Clark)
Deronectes spenceri Leech
Deronectes striatellus LeC.
Deronectes spp.
Desmopachria aldessa Young
Desmopachria aspera Young
Desmopachria aureus Young
Desmopachria bifasciata Zimm.
Desmopachria bryantstoni Sharp
Desmopachria cenchramis Young
Desmopachria circularis Sharp
Desmopachria convexa (Aube) MI.
Desmopachria darlingtoni Young
Desmopachria dispersa Sharp
Desmopachria glabricula Sharp
Desmopachria grana (LeC.)
Desmopachria granoides Young
Desmopachria iridis Young
Desmopachria latissima (LeC.)
Desmopachria leechi Young
Desmopachria mexicana Sharp
Desmopachria mutchleri Blatch.
Desmopachria nitida Babgtn.
Desmopachria novacula Young
Desmopachria portmanni (Clark)
Desmopachria ruginosa Young
Desmopachria sobrina Young
Desmopachria strigata Young
Desmopachria striola Sharp
Desmopachria subnotata Zimm.
Desmopachria tarda Spangler
Desmopachria ubangoides Young
Desmopachria varians Young
Desmopachria variegata Sharp
Desmopachria vicina Sharp
Desmopachria zelota Young
Desmopachria spp.
Dytiscus alaskanus Balfour-Browne
Dytiscus carolinus Aube
Dytiscus circumcinctus Ahrens
Dytiscus circumflexus Fab.
Dytiscus cordieri Aube MI.
Dytiscus delictus (Zaitzev)
Dytiscus dimidiatus Bergs.
Dytiscus dauricus Gblr. MI.
Dytiscus fasciventris Say MI.
Dytiscus habilis Say
Dytiscus harrisii Kby. MI.
Dytiscus hatchi Wallis
Dytiscus hybridus Aube MI.
Dytiscus latissimus L.
Dytiscus marginalis L.
Dytiscus marginicollis LeC.
Dytiscus pisanus LaP.
Dytiscus semisulcatus Muller
Dytiscus verticalis Say MI.
Eretes sticticus (L.)
Eriglenus femoralis Payk.
Gallrodytes notatus
Graphoderes adamsi Clark
Graphoderes austriacus Strum.
Graphoderes bilineatus Geer.
Graphoderes cinereus L. MI.
Graphoderes fasciatocollis (Harris)
Graphoderes liberus Say MI.
Graphoderes modestus Sharp
Graphoderes occidentalis Horn
Graphoderes perplexus Sharp
Graphoderes zonatus Hoppe
Hemiosus maculatus Sharp
Hemiosus spp.
Hydaticus bimarginatus (Say)
Hydaticus cinctipennis Aube
Hydaticus lateralis Cast.
Hydaticus modestus Sharp MI.
Hydaticus piceus LeC. MI.
Hydaticus rectus Sharp
Hydaticus rimosus Aube
Hydaticus seminiger DeG.
Hydaticus stagnalis Fab. MI.
Hydaticus subfasciatus Cast.
Hydaticus vittatus Fab.
Hydaticus spp.
Hydrocanthus oblongus Sharp
Hydroporus americanus Aube MI.
Hydroporus appalachius Sherm. MI.
Hydroporus asidytus Young
Hydroporus axillaris LeC.
Hydroporus badiellus Fall MI.
Hydroporus baelus Young
Hydroporus belfragei Sharp
Hydroporus blanchardi Sherm.
Hydroporus boreus Gordon
Hydroporus brevicornis Fall
Hydroporus cimicoides Sharp
Hydroporus civicus (Sharp)
Hydroporus carolinus Fall
Hydroporus clypealis Sharp MI.
Hydroporus coccinus (LeC.)
Hydroporus columbianus Fall.
Hydroporus conoideus LeC.
Hydroporus consimilis LeC. MI.
Hydroporus corpulentus Fall.
Hydroporus dentellus Fall MI.
Hydroporus despectus Sharp MI.
Hydroporus dichrous Melsh. MI.
Hydroporus dilatatus Fall.
Hydroporus dimidiatus G. & H.
Hydroporus dixianus Fall.
Hydroporus falli Blatch.
Hydroporus fortis LeC.
Hydroporus fuscipennis Schaum MI.
Hydroporus gaudens Fall.
Hydroporus hebes Fall.
Hydroporus hirtellus LeC.
Hydroporus hybridus Aube
Hydroporus laetus Leech
Hydroporus lapponum Gyll.
Hydroporus latebrosus LeC.
Hydroporus lineatus Fab.
Hydroporus lobatus Sharp MI.
Hydroporus lynceus Sharp.
Hydroporus mannerheimi J.B.-Browne
Hydroporus melitus LeC.
Hydroporus melsheimeri Fall. MI.
Hydroporus morio Aube MI.
Hydroporus niger Say MI.
Hydroporus nigrita Fab.
Hydroporus notabilis LeC. MI.
Hydroporus obesus LeC.
Hydroporus occidentalis Sharp
Hydroporus palustris Fab.
Hydroporus pervicinus Fall.
Hydroporus pinguis Fall.
Hydroporus planiusculus Fall.
Hydroporus planus
Hydroporus proximus Aube
Hydroporus psammodytes Young
Hydroporus pseudovilis
Hydroporus pulcher LeC.
Hydroporus sanmarki
Hydroporus pseudovilis Young MI.
Hydroporus rectus Fall.
Hydroporus republicanus Sharp
Hydroporus rossi Leech
Hydroporus rufilabris Sharp MI.
Hydroporus rufinasus
Hydroporus sericeus LeC.
Hydroporus shermani Fall.
Hydroporus similaris Fall.
Hydroporus signatus Mann. MI.
Hydroporus spurius LeC. MI.
Hydroporus striatopunctatus Melsh.
Hydroporus striola Gyll. MI.
Hydroporus tartaricus LeC. MI.
Hydroporus tenebrosus LeC. MI.
Hydroporus terminalis Sharp
Hydroporus tristis Payk. MI.
Hydroporus undulatus (Say) MI.
Hydroporus vilis LeC.
Hydroporus vittatipennis G. & H.
Hydroporus vitulus Er.
Hydroporus wickhami Zait. MI.
Hydroporus yernustus LeC.
Hydroporus spp.
Hydrotrupes palpalis Sharp
Hydrovatus compressus Sharp
Hydrovatus cuspidatus Kunze
Hydrovatus lecontei Clark
Hydrovatus major Sharp
Hydrovatus peninsularis Young
Hydrovatus platycornis Young
Hydrovatus pustulatus (Melsh.) MI.
Hydrovatus acaroides LeC.
Hygrotus berneri Y. & W.
Hygrotus canadensis Fall.
Hygrotus collatus (Fall.)
Hygrotus compar (Fall)
Hygrotus dentiger Fall.
Hygrotus dispar (LeC.) MI.
Hygrotus falli (Wallis) MI.
Hygrotus farctus (LeC.)
Hygrotus impressopunctatus (Sch.) MI.
Hygrotus inaequalis (Fab.) MI.
Hygrotus hydropicus LeC.
Hygrotus laccophilinus (LeC.) MI.
Hygrotus lutescens LeC.
Hygrotus lutosus LeC.
Hygrotus masculinus (Crotch)
Hygrotus medialis LeC.
Hygrotus nubilus (LeC.)
Hygrotus patruelis (LeC.) MI.
Hygrotus punctatus Say MI.
Hygrotus punctilineatus Fall. MI.
Hygrotus salinarius Wallis
Hygrotus sayi B.-Browne MI.
Hygrotus sellatus (LeC.) MI.
Hygrotus semivittatus Fall.
Hygrotus sharpi Vd.Br
Hydrotus suturalis (LeC.) MI.
Hydrotus sylvanus (Fall.) MI.
Hygrotus tumidventris Fall.
Hygrotus turbidus LeC. MI.
Hygrotus unguicularis Crotch.
Hygrotus wardi (Clark)
Hygrotus spp.
Hyphydrus japonicus Sharp
Hyphydrus spp.
Ilybiosoma bifarius Kirby MI.
Ilybius aenescens Th.
Ilybius ater Deg.
Ilybius angustior Gyll.
Ilybius biguttatulus Germ. MI.
Ilybius confusus Aube MI.
Ilybius fulginosus Fab.
Ilybius ignarus LeC. MI.
Ilybius oblitus Sharp
Ilybius pleuriticus LeC. MI.
Ilybius regularis LeC.
Ilybius subaeneus Er. MI.
Ilybius spp.
Laccodytes pumilio (LeC.)
Laccophilus aemulus Guignot
Laccophilus apicalis Sharp
Laccophilus atristernalis Crotch
Laccophilus bifasciatus Chev.
Laccophilus cayennensis Aube
Laccophilus chilensis Sharp
Laccophilus coccinelloides
Laccophilus conoideus LeC. MI.
Laccophilus epibletus Guignot
Laccophilus epipleuricus Zimm.
Laccophilus fasciatus Sharp
Laccophilus filicornis Sharp
Laccophilus fractus Sharp
Laccophilus fragilis Sharp
Laccophilus fusculus Sharp
Laccophilus gentilis LeC.
Laccophilus horni Vd. Br.
Laccophilus inconspicuus Fall
Laccophilus insignis Sharp
Laccophilus latifrons Sharp
Laccophilus leechi Zimm.
Laccophilus maculosus LeC. MI.
Laccophilus mexicanus Aube
Leucophilus minutus L. MI.
Laccophilus mistecus Sharp
Laccophilus nubilus Regt.
Laccophilus obscurus Panz.
Laccophilus ornatus Aube
Laccophilus oscillator Sharp
Laccophilus ovatus Sharp
Laccophilus peregrinus Zimm.
Laccophilus pictus Cast.
Laccophilus proximus Say.
Laccophilus pseudomexicanus Zimm.
Laccophilus quadrilineatus Horn
Laccophilus quadrisignatus LaP.
Laccophilus quadrivittatus Aube
Laccophilus raitti Zimm.
Laccophilus shermani Leech
Laccophilus sonorensis Zimm.
Laccophilus spergatus Sharp
Laccophilus spangleri Zimm.
Laccophilus suavis Sharp
Laccophilus tarsalis Sharp
Laccophilus testaceous (Aube)
Laccophilus traili Sharp
Laccophilus undatus Aube
Laccophilus vacaensis Young
Laccophilus vagepictus Sharp
Laccophilus variegatus Germ.
Laccophilus venezuelensis Regt.
Laccophilus venustus Chev.
Laccophilus youngi Zimm. PARATYPE
Laccornis deltoides (Fall.)
Liodessus abjectus (Sharp)
Liodessus affinis (Say)
Liodessus andinus Guignot
Liodessus bogotensis Guignot
Liodessus chiliensis (Solier)
Liodessus delfini (Regt.)
Liodessus flavicollis (LeC.)
Liodessus flavofasciatus (Stein)
Liodessus fuscatus (Crotch) MI.
Liodessus microscopicus (Zimm.)
Liodessus strobeli (Stein)
Liodessus uruguayensis (Sharp)
Macrovateilus mexicanus Sharp
Matus bicarinatus Say
Matus leechi Young
Matus ovatus Leech MI.
Matus relictus Young
Megadytes fraternus Sharp
Megadytes giganteus Cast.
Megadytes spp.
Neobidessus alternatus (Regt.)
Neobidessus alvarengai Young
Neobidessus bokermanni Young
Neobidessus bolivari Young
Neobidessus bordoni Young
Neobidessus corumbensis (Zimm.)
Neobidessus curticornis (Regt.)
Neobidessus discoidalis (Sharp)
Neobidessus hylaeus Young
Neobidessus obtusus (Sharp)
Neobidessus persimilis (Regt.)
Neobidessus phyllisae Young
Neobidessus pulloides Young
Neobidessus pullus (LeC.)
Neobidessus subvittatus (Zimm.)
Neobidessus tricorni Young
Neobidessus whitcombi Young
Neobidessus woodruffi Young
Neobidessus youngi Leech
notomicrus nanulus (LeC.)
Oreodytes crassulus Fall.
Oreodytes septentrionalis (Gyll.)
Oreodytes snoqualmie Hatch
Pachydrus brevis Sharp
Pachydrus globosus (Aube)
Pachydrus obesus Sharp
Pachydrus obniger (Chev.)
Pachydris princeps (Blatch.)
Pachydrus punctatus Sharp
Paracymus nanus (Fall.)
Paracymus suturalis (LeC.)
Rhantus anisonychus Crotch
Rhantus atricolor Aube
Rhantus binotatus (Harris) MI.
Rhantus bistriatus Bergst.
Rhantus calidus (Fab.)
Rhantus collaris Payk.
Rhantus confusus Blatch.
Rhantus consimilis Mots.
Rhantus darwini Babt.
Rhantus flavogriseus Crotch
Rhantus fostus LeC.
Rhantus frontalis Marsh
Rhantus grapii Gyll.
Rhantus gutticollis Say
Rhantus hoppingi Wallis
Rhantus hubbelli Hatch
Rhantus longipes Sharp
Rhantus luderwaldti Zimm.
Rhantus maculicollis Aube
Rhantus mexicanus Cast.
Rhantus notatus Fab.
Rhantus pacificus (Bois.)
Rhantus signatus Fab.
Rhantus sinuatus LeC. MI.
Rhantus suturellus (Harris)
Rhantus tostus LeC. MI.
Rhantus validus Sharp
Rhantus wallis Hatch
Rhantus zimmermani Wallis MI.
Rhantus spp.
Scotodytes sturmii Gyll.
Scutopterus angustus LeC. MI.
Thermonectus basillaris (Harris)
Thermonectus circumscriptus (Latr.)
Termonectus duponti Aube
Thermonectus latecintus LeC.
Thermonectus leprieuri Balfour-Browne
Thermonectus margineoguttatus Aube
Thermonectus marmoratus (Hope)
Thermonectus ornaticollis (Aube)
Thermonectus nigrofasciata Aube
Thermonectus spp.
Uvarus amandus (LeC.)
Uvarus falli Young
Uvarus inflatus Young
Uvarus lacustris (Say)
Uvarus magensis (Clark)
Uvarus rogersi (Young)
Uvarus spretus (Sharp)
Uvarus subtilis (LeC.)
Yola elegantula Boheman
Undetermined Dytiscidae