1899.] NATURAL SCIENCES OF PHILADELPHIA. 441 



Corumba, April. Two 9, eight cJ* specimens. This species 

 hears a strong resemblance to E. imignis, with which I had at 

 first confused it, but they differ in the shape of clypeus in female, 

 and in the punctate petiole of insignis, the abdomen of heviventris 

 being entirely smooth. 



Eumenes convexa n. sp. 



cf. — Black, with sericeous pile, that on second segment golden; 

 spot in eye-emargination, behind base of antennoe, scape beneath, 

 clypeus entirely, base of mandibles, anterior and posterior margins 

 of pronotum, outer margin of tegulse, dot behind them, anterior 

 margins of scutellum and postscutellura, spot on mesoplurse above, 

 four anterior femora beneath except at base, all tibise except inner 

 stripe, petiole above except at base and an elongate medial stripe, 

 and apical margins of remaining segments broadly, especially the 

 second, bright yellow; flagellum on basal half and tarsi reddish 

 or fulvous ; front with strong separated punctures ; ocelli in trian- 

 gle ; clypeus impunctate, terminating in two rather Avidely separated 

 teeth which are preceded by feeble carinse; antennal hook large; 

 thorax strongly punctured, the dorsulum sparsely in middle; pro- 

 notum margined, the antero-lateral angles somewhat developed, 

 scutellum convex, impressed ; middle segment depressed or con- 

 cave, especially toward apex ; medial femora unusually broadened 

 toward base ; petiole longer than thorax, gradually broadened from 

 beyond its basal third, impunctate, transversely depressed before 

 apex; remainder of abdomen somewhat pyriform, smooth, with 

 exception of a few large punctures before apex of dorsal segments ; 

 seventh ventral with a triangular depressed area ; second segment 

 evenly convex when viewed from side; wings subhyaline, fuscous 

 in costal and marginal cells; nervures and stigma black. Length 

 11-12 mm. 



Santarem, November. Two specimens. 

 Eumenes superficialis n. sp. 



9. — Black, with sericeous pile longest on middle segment and 

 golden on abdomen ; inner orbits from base of clypeus to within 

 eye-emargination, dot behind insertion of antennre, dot on each side 

 of clypeus basally and at summit of eyes, short line on posterior 

 orbits, posterior margin of pronotum, dot at apex of tegulie, one 

 behind these, line basally on scutellum and postscutellum, tips of 



