THE GROUND BEETLES. 139 



*241 (847). Casnonia pennsylvanica Linn., Syst. Nat, II, 620; Say, II, 

 447. 

 Head and thorax black; elytra dull red with three spots, forming an 

 interrupted transverse band, and the apex black ; antennae dusky, the three 

 basal joints reddish; legs pale, the knees dusky or black. Thorax cylin- 

 drical or nearly so, broader at base than apex. Elytra ovate, the strise 

 coarsely punctured on basal half. length 7.5 mm. (Fig. 80.) 



Throughout the State ; common. Januarj' 30-Oetober 21. Oc- 

 curs beneath logs, leaves, etc.. along fence roTvs and borders of 

 woods. A unique and easily known insect. 



Fig. 81. Fig. 80. Fig. 79. Fig. 78. 



(After Pacltard.) 



Tribe XII. DRYPTIXI. 



Antennae tapering gradually to a point, free at base. Head 

 constricted at a variable distance behind the eyes to a narrow neck ; 

 front narrowed before the eyes. ^Mentum deeply emarginate ; max- 

 illary palpi moderately long, the terminal joint more or less trian- 

 gular. Thorax often moderately long, the side margins acute, the 

 setffi at hind angle usually absent. Elytra not margined at base, 

 side margins acute, entire ; apex truncate, dorsal punctures absent. 

 Prosternum not prolonged ; hind coxse contiguous. The males have 

 the front tarsi dilated, sometimes very slightly, and densely pu- 

 bescent beneath. Representatives of one genus have been taken in 

 Indiana, while a single species of another doubtless occurs in the 

 southern counties. 



KEY TO INDIANA GENEBA OF DBYPTINI. 



u. Head elongate-oval, prolonged behind the eyes; neck inserted in thorax 

 by a semigiobular condyle; clypeus with two bristle-bearing punc- 

 tures each side ; larger, 17 or more mm. XXXVIII. Galeeita. 

 ■ la. Head triangular, scarcely prolonged behind the eyes, very suddenly con- 

 stricted to a narrow, cylindrical neck; clypeus with but one punc- 

 ture on each side, the seta long; smaller, not over 5 mm. Ztphtum. 



