100 



FAMILY IT.- — CARABlDiE. 



The members of this genus resemble those of Pterosticlms and 

 are found in the same situations, though less frequently. Of seven 

 specimens dissected by Dr. Forbes, insects such as canker worms 

 and caterpillars had formed 93 per cent, of the food, so that they 

 may be classed as highly beneficial. 



For literature treating of the genus see the first two papers by 

 LeConte mentioned under Pterostichus, also the following: 



LeConte.— "Synoptic Table" in Bull. Brook. Entom. Soc, III, 

 1880, 21, 49, 73. 



Wick%am.— C 1 Goleoptera of Northeastern America" in Journ. 

 N. Y. Ent. Soc, III, 1895, 189-190. 



Thirteen species of Evarihrtis are known from the United 

 States. Of these, six have been taken in Indiana, while another 

 may occur. 



KEY TO INDIANA SPECIES OE EVABTHRUS. 



a. Thorax subquadrate, but little constricted at base; presternum deeply 

 sulcate. 



b. Thorax wider than long ; scutellar stria wanting, 

 c. Striae of elytra strongly punctured. 



d. Margin of thorax wide, especially at base. 145. seximpressus. 

 dd. Margin of thorax narrow, nearly uniform. 146. sigielatus. 

 cc. Striae of elytra finely punctured. 147. americani s. 



bb. Thorax as long as wide ; scutellar stria present, rather long. 



148. ORBATES. 



ad. Thorax strongly constricted behind ; presternum feebly or obsoletely 

 sulcate. 



e. Hind angles of thorax prominent ; striae of elytra fine. colossus. 

 ee. Hind angles of thorax shorter, less prominent ; striae of elytra deep, 

 f. Sides of thorax much rounded. 149. sodalis. 



ff. Sides of thorax less rounded, more oblique. 150. furtive s. 



145 (610). Evarthrus seximpressus Lee, Ann. Lye. Nat. Hist., IV, 1848, 

 350. 



Elongate-oval. Black, head and thorax feebly shining; apical half 

 of antenna- and tarsi reddish-brown ; basal joints of antenna?, femora and 

 tibia? piceous. Thorax not punctate, sides rounded. Elytra very finely 

 alutaceous, opaque; intervals flat. Length 14.5-15.5 mm. 



Southern half of State, frequent ; less so in the northern coun- 

 ties. April 29-November 19. Occurs mostly on dry wooded slopes 

 beneath logs and stones. In this and the next three species the 

 thorax has the hind angles obtuse and the sides not sinuate near 

 base. 



