THE CARRION BEETLES. 



285 



Ilydnobius substriatus Lee, piceous or dark chestnut brown, 

 labrum deeply bilobed, hind femora of male with a subquadrate 

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

 northern Indiana. 



VIII. Anisotoma Illig. 1798. 



(Gr., 



unequal + joint. ") 



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

 in front of the eyes; antennae 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. 



KEY TO INDIANA SPECIES OF ANISOTOMA. 



Fig. 142. a, Anisotoma valida Horn; b, hind leg of A . assim- 

 ilis Lee; (a) femur of A. cenfata, male, (6) femur of A . obsolete), 

 male; c, C Iambus gibbvlus Lee; (a) antenna of same. 



a. Mesosternum oblique between the middle coxae. 



6. Punctures of elytral intervals finer than those of stria 1 . 



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

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

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

 tibia? scarcely longer or more curved than in female. 



556. PUNCTATOSTRIATA. 



Punctures of elytral intervals and striae equal in size; outer end of 

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



CONFERTA. 



aa. Mesosternum vertical between the coxae; elytra without subhumeral 

 striae. (Fig. 142 (&).) obsoleta. 



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. Bor. 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 coarse, closely 

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



