42 E, T. CKESSON. 



terior margin of head, but placed at some distance from base of mandibles ; 

 thorax elongate, sides parallel anteriorly, but gradually narrowed posteriorly and 

 subcompressed, sides unarmed; metathorax rounded posteriorly and abruptly 

 declivous; abdomen ovate, first segment subuodose, not distinctly denticulate 

 before apex ; second segment convex, sparsely punctured and shining, except the 

 black median stiipe which is opaque; venter sparsely and finely punctured. 



Black, with scattered erect' black hair; head silvery pubescent, except a spot 

 behind eyes and a large spot on top of vertex, which are brown ; mandibles fer- 

 ruginous, tips black ; thorax above with a broad silvery pubescent stripe on each 

 side, extending from anterior margin to ajiex of metathorax, where it is narrowed ; 

 flanks densely silvery except upper margin which is nude and shining ; legs with 

 silvery sericeous hair, calcaria white ; abdomen with apex of first segment white, 

 apical margin of segments 2-5 fringed with silvery pubescence, interrupted me- 

 dially on these segments above; second segment with two elongate, rather broad, 

 parallel, smooth, shining, ferruginous spots, extending from basal margin, where 

 they are narrowed, nearly to apical margin of the segment; when viewed from 

 above, a deep black opaque stripe extends from base of second segment, where it 

 is broadest, to apex of the abdomen ; sides of second segment sometimes brown or 

 brown-ferruginous; apical segment black, silvery at sides; venter brown. In one 

 specimen the second segment is orange-ferruginous, except the opaque black stripe 

 on middle above, and the head and thorax are tinged with dull red. 



Chapada. This may be a variety of lusca Klug, but the orna- 

 raentatiou of the abdomen seems different. Compared with King's 

 figure, the spots on second segment of abdomen are more parallel, 

 the inner margin being straight and not sinuate, and not inclined 

 to become confluent ; while the black median stripe extends from 

 base of second segment to apex of the abdomen without interruption. 



60. M. lalevittata 9- — Length 5-13 mm.— Subrobust; head transverse, 

 slightly narrower than thorax ; eyes small, convex, polished, placed near to pos- 

 terior margin of head ; thorax elongate, square in front, gradually narrowed be- 

 hind the middle, the metathoi'ax rounded behind and abruptly declivous, sides 

 of thorax unarmed; abdomen ovate, convex, first segment depressed, scarcely 

 constricted at apex; pygidium longitudinally aciculate; venter rather closely 

 punctured. 



Velvety black, with long, scattered, erect black and pale hair; head densely 

 silvery, tinged with golden above, sometimes a black spot or line near posterior 

 margin of vertex; scape silvery; thorax above with a broad silvery pubescent 

 stripe on each side extending from anterior margin to apex of metathorax; 

 flanks with dense silvery pubescence, except upper margin posteriorly, which is 

 nude, smooth and polished; legs with silvery pubescence, calcaria white; abdo- 

 men velvety black, with long pale hair at base and sides; first segment with a 

 small silvery spot, sometimes wanting, on each side at apex; second segment 

 with a transverse, slightly oblique, smooth, yellow spot or each side towards api- 

 cal margin, and generally a more or less distinct, smooth, yellow spot on each 

 side on basal margin, varying in shape from elongate to a mere dot, or obsolete; 

 a silvery pubescent spot on apical middle of segments 2-5, the lateral apical mar- 



