1902.] NATURAL SCIENCES OF PHILADELPHIA. 45 



ventral segments Avith separated punctures ; nervui-es black, stigma 

 ferruginous. Length 11 mm. 



d^. — Sculpture coarser, especially at apex of second dorsal seg- 

 ment ; in addition to the yellow markings of female the male has 

 two yellow spots on clypeus apically, and there is a greater amount 

 of red and yellow on legs ; clypeal teeth larger, the emargination 

 triangular ; space between hind ocelli, if anything, slightly greater 

 than that between them and eyes; anteunse hooked at end, 

 the last joint acuminate, slightly curved, barely as long as 

 joint 11 ; postscutellum crenulated; second, or second and third 

 segments obscurely margined with yellow at apex, and the apex of 

 middle segment marked with that color ; in one example there are 

 three lineated macula on pronotum, which may indicate that this 

 part is sometimes margined with yellow posteriorly. Length 

 9-10 mm. 



Chapada (March, December); Corumbd (April). Two ?, 

 three d specimens. 

 Odynerus (Stenancistrocerus) convolutus n. sp. 



?. — Black, with a thin grayish pile; scape, flagellum beneath, 

 mandibles, clypeus, eye-emarginations and the orbits below them, 

 spot between antennae, larger one at summit of cheeks, pronotum, 

 tegulse, mesopleurse above, and a large spot on the postero-lateral 

 angles of middle segment, rufous ; hind margin of pronotum, base 

 and apex of tegulse, a dot beneath the latter, dot near each antero- 

 lateral angle of scutellum, postscutellum entirely, and the apex of 

 first and second abdominal segments rather broadly pale yelloA\- ; 

 forelegs reddish-brown from just beyond base of femora ; other legs 

 black, with a spot near apex of medial femora, and a stripe on the 

 four hind tibiae, pale yellow ; wings dark subhyaline, fuscous along 

 costal margin and in marginal cell ; nervures and stigma black. 

 Head with deep, separated pimctures, especially above ; a rounded 

 fovea behind ocelli ; hind ocelli bordered internally by a smooth 

 tubercle, the space between them perhaps a little less than that 

 separating them from the eyes ; clypeus convex, with shallow punc- 

 tures, pyriform, triangularly emarginate at apex ; pronotum with 

 deep, sepai-ated punctures, scarcely margined, but dentate laterally; 

 dorsulum and scutellum with larger i)unctures, those on meso- 

 pleurse smaller ; postscutellum entire, somewhat angular posteriorly ; 

 middle segment deeply punctured, smooth at base of sides, broadly 



