1358 



FAMILY LXIV. MEL0ID2E. 



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

 joint of antenna very short ; mandibles short. VI Epicauta 

 oc. Front femora without a silken, hairy spot. 



d. Antenna filiform, the outer joints cylindrical. VII Pyrota 

 dd. Antennae thicker toward apex, the enter joints oval or rounded' 

 e. Labruni deeply emarginate. VIII. Pomphopce," 



ee. Labrnm slightly emarginate. Cantharis' 



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 

 antennae 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. 



KEY TO INDIANA SPECIES OF MACROBASIS. 



a. First joint of antenna 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 

 b - FiTSt joiut of maIe antenna more or less S-shaped or with a distinct 

 smuation on under side near apex; front tibia of male with one 

 terminal spur. - in 

 ,i p. ,.. , ' 2ol9. TORSA. 



M>. First- joint of male antennae not sinuate or S-shaped. but slightly flat- 

 tened and feebly curved; front tibiae 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 either sex. 252a rai 



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

 joint of male antennae not reaching the occiput; femora of male 

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

 margin. OPC<>1 



„„ ti • 2521. FLAVOCIXERErs. 



aa. First joint of antenme 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. 9 ™ 



JoJJ. IMMACULATA. 



2519 (8060). Macrobasis torsa Lec. Proc. Phil. Acad. Nat. Sci VI 1853 

 343. " ' ' 



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

 cence; antennae and legs black. Thorax slightly broader than 'long sides 



Zr/^T 1 Cm " Yed ^ ^ mediaU Kne im P^- Elytra subparallel. 

 moie oi less prumose, 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 onlv from 

 Texas. Easily distinguished from unieolor by the contorted first 

 joint of male antennae. 



