1. Next to last segment of labial palpi bisetose and subequal in length to following segment........................Stenolophus

2. First segment of metatarsus as long as the three following combined; prosternum usually with only two setigerous punctures at apex............................................................................................................................Selenophorus

First segment of metatarsus not as long as three following combined; prosternum usually with several setigerous punctures at apex...............................................................................................................................................................3

3. Each anterior angle of clypeus with two setigerous punctures; pro- and mesotarsi of male with dense pads of spongy pubescence beneath................................................................................................................................Amphasia

Each anterior angle of clypeus without or at most with one setigerous puncture; protarsi of male never with spongy pubexcence beneath, metatarsi often with two rows of scales beneath.......................................................................4

4. Hind tarsus with first article elongate, 1.3 or more times the length of antennae scape...........................................5

Hind tarsus with first article less than 1.3 times the length of antennae scape.............................................................6

5. Elytra opalescent, impunctate, pronotum reddish; male with articles 1 - 4 of front and middle tarsus with two rows of scales on ventral surface...................................................................................................................Trichotichus

Eltytra usually not opalescent, but if so, then surface is densley punctate and hairy; at least some articles of front and middle of male with a dense covering of scales ventrally............................................................................Notiobia

6. Elytra concolorous, black; legs reddish or, if darker, head behind eys punctate and hairy: pronotum with sides evenly rounded or sinuate; males with articles 1 - 4 of front and middle tarsi with two rows of scales on ventral surface............................................................................................................................................... Harpalus

Elytra bicolored, or, if black then legs are black, and head behind eyes are glabrous; pronotum with sides sinuate; male with articles 1 - 4 of front and middle tarsi with a dense covering of scales ventrally............................Anisodactylus