1358 FAMILY LXIV. — MELOIDiE. 



f. Front IV'iiiora with a silken, liairy sjiot on the under side; second 

 .joint of antenna' very short; nian(lil)les short. VI. Epicai'ta. 

 '•'•. r'ront femora witliout a sillven. iiairy spot. 



'/. Antenna' filiform, the outer Joints cylindrical. VII. 1'vhota. 



(hi. Antenna' tliicker low.-ird ajiex. tlie outer Joints oval or roundeii. 



c. Lahrum deeiily emargiuale. \\Y\. Pomphopcea. 



ee. I.al)rnni slightly emarginate. Canthabis, 



V. J\1ack()ba8is ]jee. 1862. (6r., "lonoM- a base.") 



Our species of this 'ijenus are elono-ato, sutK-ylindrical, black 

 beetles clothed with gray pubescence and having the first joint of 

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

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

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

 raiita, to Avhieh the genus is very closely related. 



KEY TO l.NUIANA SPECIES OF MACROBASIS. 



(I. First Joint of anteima' unlike in the sexes, that of the male heing much 

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

 to third and fourth together; length not over 15 nnn. 

 b. First Joint of male antenme more or less S-shaped or with a distinct 

 sinuation on mider side near ;i]iex; front tibia' of male with one 

 terminal spur. 251!». torsa. 



I)t>. First Joint of male antenna? not sinuate or S-shaped, but slightly flat- 

 tened and feebly curved; front tibi:e of male with two spurs. 

 c. Pubescence less dense, ash-gray; l)asal Joint of male antenna^ longer 

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

 hin<l in either sex. 2520. t'nicolor. 



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

 joint of male antenn;e not reaching the occiput: femora of male, 

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

 margin. 2521. fiavocinerei's. 



<i(i. First Joint of anteima' 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. 2.522. immacilata. 



251!) (SOGO). Macrobasis torsa Lee, Proc. Phil. Acad. Nat. Sci., VI, 1S53, 

 343. 

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

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

 nearly parallel, curved at apex, median line impressed. Elytra sul>parallel, 

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

 antenme cylindrical, compressed, and witli tirst Joint of front tarsi shorter 

 than second, narrow ar base and more or less dilated. Female witJi second 

 joint of antenna' sliglitly longer th.-in third. Length 11-15 nnn. 



CVawford Count.v; rare. June 11. Known heretofore only from 

 Texas. Easily distinguished from iniicolor by the contorted first 

 joint of male antenna. 



