152 FA:MILY II. CAEABIDiK. 



piceous; antenme piceDiis. paler at Unse. Thorax a little longer than wide, 

 widest slightly in front of middle ; margin very narrow, hind angles obtuse ; 

 disk transversely wrinkled, a few jmnctures near apex. Elytra oblonj;. 

 gradually broader behind; tlie striie tine, punctate; intervals tiat, sparsely 

 punctate. Length 7-7.5 mm. 



Northern half of State, frequent; Dubois county only in the 

 south. May 14-October 10. Often found on flowers. One of our 

 most handsome Carabids. 



(' purpurea Say. 7.5-9 mm. in length, ranges from ^Michigan to 

 Georgia, ]\nssouri and Kansas, but has not yet been noted in In- 

 diana. 



XL VIII. Plochioxus Dej. 1825. (Gr., "a lock of hair.") 



This genus is very close to Callidn. being separated by the char- 

 acters given in key, and by the ligula having four setae instead of 

 two, as in f'alHda. One species occurs in Indiana. 



2(i0 (0:n). Plocuionis timidus Hald.. Proc. Phil. Acad. Nat. Sci., I, 1S42, 

 29S. 

 Rather broad, de])ressed. Uniform darli: brown, the margin of thorax 

 and elytra translureut. Thorax broader than long, sides strongly rounded, 

 base wider than apex ; margin broad, hind angles rectangular ; disk trans- 

 versely wrinliled, median line distinct. Elj-tral strise deep, not punctured: 

 intei-vals ronvex, alutaceous. Males with the front tarsi narrowly dilated, 

 the first three joints with two rox^s of small scales beneath. Length 

 7-7.5 mm. 



Marion County ; scarce. March 16-November 17. Probably hi- 

 bernates. Occurs in damp places beneath bark and rubbish. 



XLIX. PiNACODERA Schaum. 1860, (Gr.. "flat -^ neck.") 



Oblong, brown or piceous beetles of rather small size, having 

 the tarsi smooth above, the middle pair in male dilated. Hind 

 angles of thorax in our species obtuse, not prominent ; inner wings 

 well developed. Two species have been taken in Indiana. 



KEY TO IXIIIAXA SPECIES OF PTXACODERA. 



('. Elytra with pale humeral spot; thorax distinctly narrowed behind, it-< 

 margin broail .ind translucent. 270. umbata. 



aa. Elytra without pale spot .-it humerus; thorax very little narrowed be- 

 hind, the margin narrow, scarcely translucent 271. platicoixi.s. 



270 (934). PiNACODERA LiMBA-iA De.j.. Spec. V. ls21t, .'120. 



Kather slender, deiiressed. Dark brown <ir piceous; antenna'. li',i:s. 

 margin of thorax, humeral spot and sides of el.vtra paler. Head slightly 

 wi-inkled above the eyes. Tliorax one-third wider than long, sides mod- 



