72 E, T. CKESSON. 



niimitely aliitaceous, shining, basal margin, broader at sides, densly pale oclu'a- 

 ceous pubescent, as well as the third, sides of fourth and narrow apical margin of 

 second segments; venter with scattered pale pubescence, black on three apical 

 segments; apical margin of segments 2-4 fimbriate with pale puV)escence; first 

 segment carinate, with a strong subapical tooth ; second segment shining, deeply 

 rather sparsely punctured, the discal fovea placed behind the middle, small and 

 white pubescent. 



Chapada (April). One specimen. This species somewhat re 

 semhles cuiba, which has black calcaria and no pale hair at base of 

 second segment above, and the pale ochraceous pubescent band be- 

 hind that segment is twice as broad as in this species. 



27. ill. vidua Klug (Nova Acta Cses. Nat. Cur., x, p. 313, pl.xxii, fig. 11.— 

 %. — Length 17-20 mm. —Large, deep velvety black, opaque, the pubescence 

 black, a few pale hairs on clypeus; eyes rounded, very convex. Scutellum con- 

 vex, carinate on disk, lateral teeth prominent and truncate at tip ; a large promi- 

 nent obtuse tooth beneath tegulae; metathorax broad, flattened posteriorly, 

 coarsely reticulated, lateral margin prominent and subcarinate towards base, the 

 upper surface with long pale silky hair and a patch of dense white pubescence 

 on each side, sometimes confluent on disk, flanks abruptly declivous. Wings 

 fuscous, paler at base, and with a pale hooked streak through second submarginal 

 cell; marginal cell shorter than second and third submarginal cells combined, 

 broadly rounded at tip; third submarginal cell extending beyond marginal, and 

 nearly as broad beneath as above; first and second transverso-cubital nervures 

 approximate on marginal. Legs with black pubescence, dense and white on 

 inner side of tibiae, long, sparse and pale on femora; calcaria white. Abdomen 

 with basal segment coarsely punctured, subnodose, broadly constricted at apex 

 the pubescence long and pale, with a broad dense appressed white pubescent 

 band at apex; second segment densely finely punctured, subopaque, a patch of 

 white pubescence on basal corners, sometimes indistinct; the extreme lateral 

 margin finely fimbriate with white pubescence, ending in a spot at extreme apex ; 

 a similar spot on apex of third segment and sometimes on fourth ; beneath shin- 

 ing, with black pubescence, the basal segment carinate, with a prominent com- 

 pressed spine before apex ; second segment deeply and sparsely punctured, with 

 an elongate pubescent fovea on disk. 



Santarem. Two specimens. 



28. M. loreiia %. — Length 14 mm. — Black,subopaque, the pubescence black, 

 that on clypeus and cheeks sparse and pale. Eyes subovate, convex, polished. 

 Scutellum convex, with a short longitudinal carina on basal middle, the lateral 

 teeth short and truncate at apex ; an acute tubercle beneath tegulae; metathorax 

 reticulated, the pubescence long, sparse and pale. Wings fuscous; marginal cell 

 short, not longer than second submarginal, truncate at tip, the latter receiving 

 the recurrent nervure between middle and base; third submarginal comjjlete. 

 very much narrowed beneath, triangular. Legs with black pubescence, pale 

 sericeous on inner side of tibiae and sparse on femora; calcaria white. Abdomen 

 with basal segment subnodose and subconstricted at apex, the pubescence long 

 and white, shorter and more dense on ai)ical margin ; second segment densely 



