"6 PROCEEDINGS OF THE ACADEMY OF [Feb., 



large pimctures, the postero-lateral angles furnished with a process; 

 abdomen fusiform, the first segment transversely carinated or fur- 

 rowed, but bearing a slight longitudinal furrow above, with strong, 

 rather even pimctures which are much less coarse than those of 

 thorax ; second dorsal segment with a medial prominence, the pimc- 

 tures quite coarse apically; remaining dorsals closely and coarsely 

 punctured, especially apically; ventrals W'ith large sparse punc- 

 tures; wings flavo-hyaline, darker on apical half, nervures testa- 

 ceous. Length 11 mm. 



Corumbji (April). One specimen. The first segment bears 

 above close to apical margin a tooth-like projection, which may be 

 a malformation. Other specimens are needed to verify this. 

 Odynerus (Stenodynerus) griseus n. sp. 



9. — Black; abdomen and sides of middle segment thinly pale 

 sericeous; short line on inner orbits near clypeus, line on mandibles 

 basally, sometimes two spots on postscutellum, a line bordering pos- 

 terior surface of middle segment, yellow; legs testaceous brown, 

 fore tarsi lighter apically; tegulse with a testaceous spot medially. 

 Form elongate, head strongly punctured, those on front largest, 

 becoming smaller toward occiput; clypeus with large shallow punc- 

 tures, a little longer than broad, broadly emarginate at apex; thorax 

 strongly punctured, those on dorsulum and scutellum well separ- 

 ated, those on mesopleurse not confluent ; dorsal surface of middle 

 segment rugose, in length medially about equal to the postscutel- 

 lum, with a medially emarginate crista, posterior surface concave, 

 polished, apically with a few transverse striae, postero-lateral angles 

 strongly dentate; abdomen beyond first segment closely, though 

 distinctly, punctured, the first with stronger, separated punctures, 

 which become sparser anteriorly ; second dorsal apically, and remain- 

 ing segments strongly punctured; second dorsal medially with an 

 elongate, polished tubercle; wings fuscous on basal two-thirds, re- 

 mainder subhyaliue, nervures black; stigma brown. Length 12 mm. 



c?. — Form and coloration similar to female, the pimctuation per- 

 haps a little coarser; clypeus more angularly emai'ginate, the lateral 

 angles therefore more acute; flagellum elongate, hooked at tip, the 

 last joint slightly curved; seen from above the first joint of flagel- 

 lum is scarcely one-third longer than the second. Length 12- 

 13 mm. 



Cliapada (March); Corumba (April). Two female and tAvo 

 male specimens. 



