NO. 1119. PROCEEDINGS OF THE NATIONAL MUSEUM. 701 



tate; vertex smootliat middle. Thorax short, with tliesidesouly slightly 

 converging from base to middle, then strongly arcnate to apex; poste- 

 rior angles obtuse; base broadly arcuate, scarcely truncate at middle, 

 and slightly siuuateeach side; disk sparsely and minutely punctate with 

 six largo rounded patches : two pairs marginal, the posterior one oblong, 

 larger, and two smaller rounded basal spots in the normal position ; one 

 specimen has an additional pair on the disk, but very small. Scutellum 

 smooth, acute. Elytra outlined as iu M. (onahilis, but the stria* are not 

 im})ressed, the punctures are nearly obsolete in the scutellar region, and 

 the white patches are smaller. There are on each side three sutural 

 spots, rather small, a small spot above and another beneath the humeral 

 callus; three marginal spots, the anterior two large, a large apical and 

 some irregular smaller spots. The pygidium is transversely strigose at 

 middle and has a large round niveous patch each side. Metasternum 

 smooth and polished at middle, Avith a large quadrangular niveous 

 patch, covering the sides. Hind coxa' strigose, with a round spot at side 

 margin. Ventral segments strigose at the sides, with a transverse 

 row of i)unctures on the middle of each, fifth with an obtuse tooth at 

 the lateral posterior margin, sixth subtruncate. Legs as iu amahilis, 

 the anterior femora densely fimbriate. Length, 11.5 mm.; width, 7 mm. 

 Three female examples. 



Tyi}e.—:So. 578, U.S.X.M. 



This species is very distinct from ((mabilis, Swarz, and allied forms 

 of the African continent by the characters given above. The genus 

 MicrofJiyrcus has been erected for certain Africiin species, formerly 

 included in Oxythyre<(, that show strongly developed sexual characters 

 in the male. That the above-described female belongs to the genus is 

 inferred from the fact that the fifth abdominal segment has marginal 

 spines. 



6. LEPTOCERA ALDABRENSIS, new species. 



Elongate, black, with impressed longitudinal bands on thorax and 

 elytra, covered with a very dense, white, silky pubescence. Antennie 

 piceous, as long as the body, very sparsely pubescent, slender; first 

 joint stout, clavate, strongly curvate; third Joint nearly as long as 

 fourth and fifth together. Head broader tliau thorax, densely pubes- 

 cent; antennal tubercles and a spot on vertex glabrous; palpi small, 

 last joint slender, slightly and obliquely truncate at apex. Thorax 

 cylindrical, feebly constricted at each end, deeply punctate, opaque, 

 with four longitudinal vitta". Elytra dark green, at base broader than 

 thorax, slightly narrowed behind; apices squarely truncate; disk some- 

 what depressed, coarsely punctate in regular stri;e, interrupted by the 

 impressed white vitta'; sutural vitta entire, a discal vitta from base to 

 middle, somewhat directed toward the suture; a second discal vitta on 

 the posterior half, connected at •,\\)Qx with the sutural, extending some- 

 what beyond the middle in front; subhumeral vitta short. Ventral 

 surface densely pubescent, side margin of metasternum and middle of 



