THE CAHRION BEETLES. 



285 



Hi/diiohms suhstrial us Lee, piceous or dark chestnut bro^vu, 

 labrum deeply bilobed, hind femora of male with a subquadrate 

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

 northern Indiana. 



VIII. Anisotoma Illig. 1798. (dr., " unequal + . joint.") 

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

 m 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, A nisotmna valida Bom; 6, hind leg of A. assim- 

 ilis Lcc; (o) femur of ^1. ccn/er to, male, (6) femm-of A. obsoleto, 

 male; c, Ciamhus gihbvlvs Lee; (a) antenna of same. 



KEY TO INDIANA SPECIES OF ANISOTOMA. 



0. Mesosternum oblique between the middle cox;e. 



6. Punctures of elytral intervals finer than those of stJ-i:i'. 



c. Hind femora of male obtusely serrulate or erenulate ; liiml tibiie 

 Slender and strongly curved. (Fig. 142. h.) assimilis. 



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

 tibiae scarcely longer or more curved than in female. 



55(i. punctatostkiata. 

 hh. Punctures of elytral intervals and striae e(]ual in size ; outer end (jf 

 hind femora of male forming an acute hoolt. (Fig. 1-12 ((/)•) 



CONFKRTA. 



aa. Mesosternum vertical betw-een the coxte ; elytra without subhumeral 

 striiB. (Fig. 142 (6).) ohsoleta. 



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

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

 and westward. 



556 (1772). Anisotoma punotatosteiata 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 ape.x, the latter 

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

 finely punctate. Elytra <nal, surface with eight rows of roarse, closely 

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



