THE ANT-LOVING BEETLES. 311 



V. PiLOPius Casey. 1897. 



Antenna? approximate at base, clavate; joints 2-4 of maxillary 

 palpi with long bristle-like appendages, the second joint bent and 

 clavate, the third transversely lunate; abdomen with second and 

 third ventrals not mucli longer than fourth; first four visible 

 dorsals equal in length; front femora with stiff, erect bristles, but 

 withoiit spines. Two species are known from the State and another 

 probably occurs. 



KEY TO INDIANA SPECIES OP PILOPITJS. 



a. Pubescence rather sparse; last joint of antennae as long as the three 

 preceding combined. 

 6. Tenth antennal joint not at all longer than wide, the sixth joint as 

 long as fifth ; body stout ; elytra nearly as long as wide. 



504. LACUSTEIS. 



66. Tenth antennal joint distinctly longer than wide. 



c. Body stout, generally dark In color ; abdomen always black or 

 blackish ; thorax feebly transverse, never more than one-half as 

 wide as elytra ; fifth antennal joint slightly longer than fourth. 



lOWENSIS. 



cc. Body narrower, pale in color throughout, the abdomen never black- 

 ish ; elytra nearly as long as wide, rather longer than head and 

 thorax combined. 595. zimmermanni. 



aa. Pubescence dense, shorter and more scale-like; last antennal joint much 

 shorter than the three preceding combined ; elytra as long as head 

 and thorax. consobeinus. 



*594 ( ). PiMPius LAousTBis Casey, Ann. N. Y. Acad. Sci., IX, 1897, 



619. 

 Rather stout, subconvex. Dark reddish-brown; elytra, antenniE and 

 legs paler. Head as wide as long; occiput with two large fovere between 

 the eyes. Antennie of male three-fourths the length of body, joints cylin- 

 drical, nearly equal ; of female, shorter with joints 7-10 short, transverse, 

 last joint shorter, oblong-oval. Thorax wider than long, disk with an ob- 

 long median fovea at base, reaching almost to middle, and a smaller one 

 each side. Elytra slightly wider at base than thorax, thence gradually 

 widening to apex, each with a fine, entire sutural and median stria. Ab- 

 donien convex, margin broad, tip rounded. Length 1.8 mm. (Fig. 148. d.) 



Southern half of State: common. April 5-Deeember 23. Oc- 

 curs beneath logs and bark ; gregarious in winter. A number were 

 once swept from stems of blue-grass in May. Usually known as P 

 piceus Lee, from which it is distinguished by its more elongate 

 and paler elytra and shorter tenth antennal joint. 



P iou-rnsis Casey, length 1.7 mm,, was described from Iowa. 

 595 (187?. I . PiLOPius ZIMMERMANNI Lec, Bost. Joum. Nat. Hist., VI, 1849, 79. 



Pale brownish-yellow, sparsely pubescent. Head with frontal groove 

 not reacliing the oblong frontal foveae; occiput elevated, its foveje larger, 



