Distribution is given by County within each State of Montana (MT), South Dakota (SD) and Wyoming (WY).  Extralimital distribution information on each species is available on elsewhere at this website [../Nearctic/Classification.html].

Agrypnus rectangularis (Say)
        Distribution - SD: Fall River
Danosoma brevicorne (Say)
        Distribution - SD: Custer, Harding, Lawrence; WY: Crook
Danosoma obtecta (Say)
        Distribution - SD: Custer, Harding, Lawrence; WY: Crook, Weston
Lacon aurorata (Say)
        Distribution - SD: Lawrence; WY: Weston

Aeolus mellillus (Say)
        Distribution - SD: Lawrence, Meade
Conoderus auritus (Herbst)
        Distribution - SD: Fall River
Conoderus vespertinus (Fabricius)
        Distribution - SD: Fall River

Alaus melanops LeConte
        Distribution - SD: Custer; WY: Crook, Weston
Alaus oculatus (Linnaeus)
        Distribution - SD: Lawrence, Meade, Pennington
 
 

Athous rufiventris rufiventris (Eschscholtz)
        Distribution - SD: Pennington
Hemicrepidius memnonius (Herbst)
        Distribution - SD: Lawrence
Hemicrepidius carbonatus (LeConte)
        Distribution - SD: Pennington
Limonius aeger LeConte
        Distribution - MT: Carter; SD: Custer, Harding, Lawrence, Pennington; WY: Crook
Limonius californicus Mannerheim
        Distribution - SD: Pennington
Limonius pectoralis LeConte
        Distribution - SD: Custer, Lawrence
Limonius ursinus Van Dyke
        Distribution - SD: Custer

Actenicerus viridis (LeConte)
        Distribution - SD: Lawrence
Corymbitodes pygmaeus (Van Dyke)
        Distribution - SD: Lawrence, Pennington; WY: Crook
Ctenicera kendalli (Kirby)
        Distribution - SD: Lawrence
Ctenicera monticola (Horn)
        Distribution - SD: Harding, Lawrence, Pennington; WY: Crook
Ctenicera resplendens (Eschscholtz)
        Distribution - SD: Custer, Lawrence; WY: Crook
Hadromorphus callidus (Brown)
        Distribution - SD: Custer; WY: Weston
Hadromorphus glaucus (Brown)
        Distribution - MT: Carter; SD: Fall River, Harding, Lawrence; WY: Crook
Liotrichus (Acteniceromorphus) stricklandi (Brown)
        Distribution - SD: Lawrence; WY: Crook
Oxygonus obesus (Say)
        Distribution - WY: Crook
Prosternon mediana (Germar)
        Distribution - SD: Custer, Lawrence; WY: Crook
Pseudanostirus nigricollis (Bland)
        Distribution - SD: Lawrence, Pennington; WY: Crook
Pseudanostirus propolus (LeConte)
        Distribution - MT: Carter; SD: Custer, Fall River, Harding, Lawrence, Pennington; WY: Crook, Weston
Pseudanostirus triundulatus (Randall)
        Distribution - MT: Carter; SD: Custer, Fall River, Harding, Lawrence, Pennington; WY: Crook, Weston
Selatosomus aeripennis (Kirby)
        Distribution - SD: Harding, Lawrence, Pennington
Selatosomus cruciatus (Linnaeus)
        Distribution - SD: Custer, Lawrence, Pennington; WY: Crook
Setasomus nitidulus (LeConte)
        Distribution - SD: Lawrence, Pennington

Hypnoidus bicolor (Eschscholtz)
        Distribution - SD: Lawrence

Neohypdonus tumescens (LeConte)
        Distribution - SD: Custer, Lawrence

Sericus incongruus LeConte
        Distribution - SD: Lawrence

Agriotes fucosus (LeConte)
        Distribution - SD: Custer, Lawrence; WY: Crook
Agriotes limosus (LeConte)
        Distribution - SD: Custer, Fall River, Lawrence, Pennington; WY: Crook
Agriotes stabilis (LeConte)
        Distribution - MT: Carter; SD: Custer, Lawrence; WY: Crook
Dalopius mirabilis Brown
        Distribution - SD: Custer, Lawrence, Pennington; WY: Crook
Dalopius pallidus Brown
        Distribution - WY: Crook
Dalopius vagus Brown
        Distribution - SD: Lawrence

Drasterius debilis LeConte
        Distribution - SD: Lawrence, Pennington; WY: Crook

Ampedus apicatus (Say)
        Distribution - SD: Custer, Fall River, Lawrence, Pennington; WY: Crook, Weston
Ampedus areolatus (Say)
        Distribution - WY: Crook
Ampedus atripennis (Horn)
        Distribution - SD: Custer, Fall River; WY: Weston
Ampedus luctuosus (LeConte)
        Distribution - MT: Carter; SD: Custer, Harding, Lawrence; WY: Crook
Ampedus melsheimeri (Leng)
        Distribution - SD: Custer, Lawrence
Ampedus molestus (LeConte)
        Distribution - MT: Carter; SD: Custer, Harding, Lawrence; WY: Crook, Weston
Ampedus nigricans Germar
        Distribution - MT: Carter; SD: Custer, Lawrence; WY: Crook
Ampedus occidentalis Lane
        Distribution - MT: Carter; SD: Harding; WY: Crook, Weston
Ampedus pullus Germar
        Distribution - SD: Custer, Lawrence, Pennington; WY: Crook, Weston
Ampedus sellatus Leng
        Distribution - WY: Crook

Megapenthes stigmosus (LeConte)
        Distribution - SD: Lawrence, Pennington; WY: Crook

Melanotus castanipes (Paykull)
        Distribution - SD: Custer, Lawrence; WY: Crook, Weston
Melanotus cribulosus (LeConte)
        Distribution - SD: Meade
Melanotus decumanus (Erichson)
        Distribution - SD: Meade
Melanotus depressus (Melsheimer)
        Distribution: WY: Crook
Melanotus pilosus Blatchley
        Distribution: SD: Fall River
Melanotus similis (Kirby)
        Distribution - SD: Custer; WY: Crook, Weston

Cardiophorus convexus (Say)
        Distribution - SD: Lawrence
Cardiophorus fenestratus LeConte
        Distribution - SD: Custer
Cardiophorus montanus Bland
        Distribution - SD: Custer