58 PROCEEDINGS OF THE ACADEMY OF [Feb., 



cell extending on to the apical margin, nervures and stigma dark 

 brown. Length 7^ mm. 



One specimen, without px-ecise locality^ label. The black of 

 clypeus, in shape, resembles an inverted decanter. 

 Odynerus dorsonotatus n. sp. 



9 . — Black ; with sericeous gray pile especially on abdomen ; 

 scape beneath, dot at base of antennse, in eye-emargination, short 

 line on cheeks near summit, posterior margin of prouotum and 

 anteriorly in the middle (sometimes the lateral angles), large spot 

 on dorsulum at apex, smaller ones beneath and behind tegulae, 

 postscutellum except apex, the margins of the concavity of middle 

 segment, a stripe ou all tibiae, and apical margin of segments 1-5 

 (that on 1 and 2 broadest), yellow; in one specimen the entire 

 concavity of middle segment is yellow; tegulse dark l)rown or 

 black. Head watli deep, separated punctui'es, especially on front, 

 which is convex and very slightly impressed ; ocelli rather deeply 

 pitted, the hind pair margined internally by a tubercle, and behind 

 them is a smooth, depressed area ; clypeus pyriform, wholly black, 

 apparently impunctate at base and sides, coarsely striato-punctate 

 apically, bearing a rather long carina on each side which terminates 

 apically in a large acute tooth, making the clypeus strongly biden- 

 tate, the teeth well separated ; flagellum clavate ; punctures of the 

 thorax not so close as on front, though probably as strong, those 

 on mesopleurjie sparsest ; pronotum not crested, but sharply dentate 

 laterally, its medial length insignificant ; scutellum distinctly fur- 

 rowed down middle ; upper surface of middle segment distinctly 

 developed medially, not eraarginate, rugoso-punctate ; concavity 

 broad with shallow punctures, the bordei'iug ridge not well marked, 

 sides of middle segment with large, sparse punctures ; carina of 

 first dorsal segment distinct, though not very sharp, and is some- 

 what irregular, margined posteriorly by foveas, and then followed 

 by a large, smooth, triangular area on each side, the remainder of 

 segment with deep, sejjarated punctures, its medial length greater 

 than half its apical width ; second dorsal almost impunctate basally, 

 most strongly and closely punctured apically, the posterior margin 

 not reflexed ; second .ventral segment with larger, shallow, sparser 

 punctures; wings dark subhyaline, with a fuscous cloud in the 

 marginal cell, nervures and stigma dark. Length 8 mm. 



Chapada (December). Four specimens. The immaculate cly- 



