442 PROCEEDINGS OF THE ACADEMY OF [1899. 



all femora, stripe on all tibise (tarsi dark), line at apex of petiole, 

 and remaining segment broadly, bright yellow, that on second 

 dorsal covering at least one-third its surface and angularly produced 

 anteriorly in middle, and produced anteriorly along sides of seg- 

 ment; flagellum fulvous beneath; front strongly punctured, promi- 

 nent on each side, so that it possesses apparently two diverging 

 carinse originated at each side of fore ocellus ; clypeus with fine 

 dense punctures, but little longer than broad, terminating in two 

 rather approximate, short teeth, not carinate, evenly convex; 

 thorax Avith deep punctures, those on pronotum closest ; the latter 

 margined anteriorly; sculellum having the largest punctures, im- 

 pressed; middle segment depressed down middle, but hardly 

 concave; petiole about as long as thorax, evenly dilated from about 

 middle, the enlarged portion sparsely punctured, not distinctly 

 transversely depressed before apex, but with a fovea or pit at its 

 summit; second segment, seen from side, elongate, above and 

 beneath between base and apex apparently subangulate, the contour 

 of the second ventral is decidedly sinuous as the segment is de- 

 pressed medially; second dorsal densely punctured; wings pale 

 fusco-hyaline, the costal and marginal cells pale yellow; stigma 

 brown; nervui'es darker. Length 11 mm. 



c?. — Base and sides of clypeus yellow; flagellum more fulvous 

 beneath ; a dot sometimes on mesopleur^e and line on each side of 

 fore margin of pronotum, yellow; antenual hook very slender, 

 spine-like, the preceding six or seven joints minutely dentate 

 beneath; medial femora slender, not unusually widened at base; 

 seventh ventral segment small, smooth. Length 10^ mm. 



Corumba, April; Chapada, December. One 9, two d^ speci- 

 mens. The resemblance borne by this species to convexa is only 

 superficial. 



Eumenes usitata n. sp. 



9. — Black; head and thorax rather densely clothed with pale 

 sericeous pile; spot in emai'giuation of eye, behind base of antennae, 

 an angular line on clypeus laterally, scape beneath, hind orbits 

 above, interrupted line on pronotum anteriorly, its posterior mar- 

 gin, two spots, or a line, on anterior margin of scutellum and 

 postscutellum, spot beneath wing, and on four hind coxoe, narrow 

 interrupted line on sides of petiole, line at apex and a line just 



