136 FAMILY IT. CABABIB.E. 



impressions long, curved r.nd shallow, not punctured. Klytral strue very 

 line, not punctured : intervals Hal : dorsal punctures four, the tirst and sec- 

 iind on third stria, the others on second stria. Length 7-7.5 nnu. 



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

 cott near Wolf Lake. March 20. 



XXXIII. OLISTIIOPCS Dej. ]82f>. (Gr., "slippery + foot,") 



Small piceous or brownish l)eetles of the tribe Platynini, having 

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

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

 curs in Indiana. They are briefly treated by 



LeContc.Proc. Phil. Acad. Nat. Sci.. 1854, 58. 



flora,-- Bull, Brook. Entom. Soe.. V. 1882, 63. 



*2.'>7 (S:>!>. Oi.isTiioi'i s pAii.M.vn s Say. Trans. Amer. Phil. Hoc., II, 1823, 

 4<>; ibid. II. 474. 537. 



Itatlier broad, snbdepressed. Head and thorax black; base of an- 

 tenna'. 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. Elylral stria' rather Hue. 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. 1887. (Gr.. "around + angle.") 



Very small piceous or brownish beetles, having the labrum 

 square and Mat; 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. 18112. 44. 



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



KEY TO SPECIES OF PEKIGONA. 



a. Head alone piceous; elytra slightly oblong. NIGRICEPS. 



mi. Head and thorax pieeous: elytra oval and more convex. 



238. PALLIPENNIS. 



/'. iiif/r/ci j>s Dej.. length 12.. "> mm., is recorded from Cincinnati. 



L>:;s C.rjsoi. I'KKI.;O.\A PALUPENNIS Lee.. Trans. Amer. I'hil. Soc., X, 1853, 

 386. 



Oblong-oval. Head and thoiax picenus; elytra dull reddish-brown; an- 

 tenme and legs pale yellow. Thorax sulxiuadrate. slightly wider than long; 



