136 



FAMILY II. CAKABIM. 



impressions long, curved and shallow, not punctured. Elytral strife very 

 line, not punctured ; intervals flat ; dorsal punctures four, the first and sec- 

 ond on third stria, the others on second stria. Length 7-7.5 mm. 



Lake County; scarce. About twenty specimens taken by Wol- 

 eott near Wolf Lake. March 26. 



XXXIII. Oltsthopus Dej. 1825. (G-r., " slippery + foot. " ) 



Small piceous or brownish beetles of the tribe Platynini, having 

 the claws of the tarsi entire and the mentum without a tooth. But 

 t wo species are as yet known in the United States, one of which oc- 

 curs in Indiana. They are briefly treated by 



LeConie.—Vrov. Phil. Acad. Nat. ScL, 1854, 58. 



Horn.— Bull, Brook. Entonf. Soc. V. 1882, 63. 



*237 (839). Olisthopi s parmatus Say, Trans. Amer. Phil. Soc, II, 1823, 

 49; ibid. II. 474. 537. 

 Rather broad, subdepressed. Head and thorax black ; base of an- 

 tennae, edge of thorax, legs and basal half of elytra dull brownish-yellow; 

 apical portion of elytra darker. Thorax rounded, one-half wider than long, 

 sides broadly rounded into base, margin very narrow, basal impressions 

 small and narrow. Elytral striae rather fine, not punctured; intervals 

 slightly convex, the third with three very small dorsal punctures. Length 

 7-7.5 mm. 



Southern half of State, scarce ; Lake County only in the north. 

 January 6 -November 7. The elytra are sometimes almost wholly 

 brownish-yellow. 



XXXIV. Perigona Lap. 1837. (Gr., "around + angle.") 



Very small piceous or brownish beetles, having the labrum 

 square and flat; mentum deeply emarginate and without a tooth; 

 antenna? rather stout beyond the third joint, which is of the same 

 length as the second. The genus is treated by 



Horn.— Trans. Amer. Ent, Soc. XIX. 1892, 44. 



One species has been taken in Indiana, while another may occur. 



KEY TO SPECIES OF PEEIGONA. 



a. Head alone piceous ; elytra slightlj' oblong, nigriceps. 

 aa. Head and thorax piceous; elytra oval and more convex. 



238. PALLIPENNIS. 



P. nigriceps Dej.. length 2.5 mm., is recorded from Cincinnati. 



23S (9280). Perigona pallipexxis Lee. Trans. Amer. Phil. Soc, X, 1853. 

 386. 



Oblong-oval. Head and thorax piceous; elytra dull reddish-brown; an- 

 tennae and legs pale yellow. Thorax subquadrate, slightly wider than long; 



