1358 FAMILY LXIV. MELOID^K. 



c. Front femora with a silken, hairy spot on the under side; second 

 joint of antenna- very short; mandibles short. VI. EPICATTA. 

 <<. Front femora without a silken, hairy spol. 



(I. Antenna? filiform, the outer joints cylindrical. VII. PYKOTA. 



<ld. Antenna? thicker toward apex, the outer joints oval or rounded. 



e. Labrum deeply einarginate. VIII. POMPHOPCEA. 



ee. Labruni slightly emarginate. CANTHABIS. 



V. MACROBASIS Lec. 1862. (Gr., "long + a base.") 



Our species of this genus are elongate, subcylindrical, black 

 beetles clothed with gray pubescence and having the first joint of 

 antenna 1 of male elongate and the second joint always more than 

 half the length of third ; last joint of maxillary palpi triangular and 

 obliquely truncate; front thighs with spot of pubescence as in Epi- 

 cauta, to which the genus is very closely related. 



KKY TO INDIANA SPECIES OF MACROBASIS. 



a. First joint of antenn;e unlike in the sexes, that of the male being much 

 thickened and longer than the next two; second joint of male equal 

 to third and fourth together: length not over 15 mm. 

 l>. First joint of male antenme more or less S-shaped or with a distinct 

 sinuation on under side near apex: front tilme of male with one 

 terminal spur. 2519. TORSA. 



lib. First joint of male antenna? not sinuate or S-shaped, but slightly flat- 

 tened and feebly curved ; front tibia? of male with two spurs, 

 c. Pubescence less dense, ash-gray ; basal joint of male antenna? longer 

 and wider, reaching the occiput; femora without long hairs be- 

 hind in cither sex. 2520. ITNICOLOR. 

 cc. Pubescence more dense and with a distinct yellowish tinge; basal 

 joint of male antenna? not reaching the occiput; femora of male, 

 especially the hind ones, clothed with long hairs on their hinder 

 margin. 2521. FLAVOCIXEREVS. 

 an. First joint of antenna- similar in the sexes and not in either sex longer 

 than the next two: second joint in both sexes not longer than third; 

 length 13-23 mm. 2522. IMMACULATA. 



251!) (8000). MACRORASIS TORSA Lec.. Proc. Phil. Acad. Nat. Sci.. VI. 1853, 



343. 



Elongate, slender. Black, sparsely clothed with short, grayish pubes- 

 cence: antenna 1 and legs black. Thorax slightly broader than long, sides 

 nearly parallel, curved at apex, median line impressed. Elytra sub-parallel, 

 more or less pruinose, moderately punctured. Male with second joint of 

 antenna? cylindrical, compressed, and with first joint of front tarsi shorter 

 than second, narrow at base and more or less dilated. Female with second 

 joint of antenna? slightly longer than third. Length 11-15 mm. 



Crawford County; rare. June 11. Known heretofore only from 

 Texas. Easily distinguished from unicolor by the contorted first 

 joint of male antennae. 



