THE CARRION BEETLES. 



285 



Hydnoibius substriatiis Lee., piceous or dark chestnut l)ro\vn, 

 labrum deeply bilobed, hind femora of male with a subquadrale 

 tooth, length 2-2.5 mm., is a boreal species which may occur in 

 northern Indiana. 



VIII. ANISOTOMA Tllig. 1798. (Gr., "unequal + joint.") 



Oval or oblong-oval species having the head short, not prolonged 

 in front, of the eyes; antenna? short, 11 -jointed, joints 7 to 11, form- 

 ing an abrupt oblong club, the eighth very short and narrower 

 than the seventh or ninth ; 

 last joint of maxillary pal- 

 pi longer than the third, 

 cylindrical and slightly 

 acuminate at tip ; front 

 and middle tarsi in both 

 sexes with five joints, hind 

 ones with four. One spe- 

 cies has been taken in In- 

 diana, while three others 

 may occur. 



Fig. 142. a,Anisotumn rniidn Horn; >>, hind leg of A. assim- 

 i/is Lee.; (o) femur of A. ccnjiita,ma\e, (b) femur of A. obsoletn. 

 male; c, Clambiis gibbvhs I.ec.; (a) antenna of same. 



KEY TO INDIANA SPECIES OF ANISOTOMA. 



a. Mesosternum oblique between the middle cox:e. 



6. Punctures of elytral intervals tiner than those of stria>. 



c. Hind femora of male obtusely serrulate or crenulate ; hind tibhe 

 slender and strongly curved. (Fig. 142, b.) ASSIMILIS. 



cc. Hind femora of male simple, neither dentate nor serrulate; hind 

 tibia? scarcely longer or more curved than in female. 



556. PUNCTATOSTRIATA. 



&6. Punctures of elytral intervals and strke equal in size; outer end of 

 hind femora of male forming an acute hook. (Fig. 142 (o).) 



CONFERTA. 



da. Mesosteruum vertical between the coxa?; elytra without subhumeral 

 stria?. (Fig. 142 (?>).) OHSOLETA. 



A. assimilis Lee., piceous or dark reddish-brown, length 3.5-4 

 mm., is a boreal species, ranging from New Hampshire to Michigan 

 and westward. 



556 (1772). ANISOTOMA PUNCTATOSTRIATA Kirby, Faun. Bur. Amer.. IV, 



1837, 110. 



Oval, slightly oblong, convex. Dull brownish-yellow, shining. Thorax 

 twice as wide as long, gradually narrower from base to apex, the latter 

 emarginate, base truncate; hind angles rectangular, surface sparsely and 

 finely punctate. Elytra oval, surface with eight rows of c.-arse, closely 

 placed punctures, the eighth abbreviated at base, also with a rather long 



