fuscous-violaceous, the stigma and basal nervures fulvous. Flagellum 

 of antennae entirely black j the hook black, not quite reaching to the 

 base of the penultimate segment. Male.Length to end of second ab- 

 dominal segment 8 mm. Ormsby county^ Nevada. July. 



Clypeus slightly but distinctly longer than its greatest width; its 

 apex with a shallow but distinct rounded incision, the sides forming 

 blunt teeth; the whole surface is strongly and moderately closely 

 punctured; the eye incision much more closely rugosely reticulated. 

 Base of thorax not transverse, slightly rounded, its sides not angled; 

 the apex excavated in the middle, its sides margined, more distinctly 

 on the upper than on the lower part, the upper edge at the postscute- 

 llum, projecting into a stout tooth, which is longer than its width at 

 the bottom. Pro and mesothorax coarsely, closely, rugosely punctured, 

 the sides more coarsely than the top, the punctuation on them running 

 into reticulations. Metanotum and lower parts of metapleurae finely 

 closely striated; the upper part of the pleurae strongly sloped, smooth. 

 Head, thorax and base of abdomen densely covered with fuscous pubes- 

 cence; the first abdominal segment smooth, the second closely minutely 

 punctured, its apex strongly punctured, as are also the other segments, 

 especially at the apex; the apex of the first is slightly, of the second 

 largely, curled up. Postscutellum truncate. 



Agrees 'best with Odynerus s. str. It comes close to O. bland us 

 Sauss. 



3956 Odynerus auranus sp. nov. 



Black; the clypeus, labrum, mandibles, except the extreme apex; 

 a broad line on the lower part of the eye incision, a large mark twice 

 longer than the width at top where it is widest and slightly incised at 

 the middle, a short line on the upper outer orbits, antennal scape below, 

 a broad line on the pronotum extending laterally shortly below the 

 pleurae, tegulae except for a black and brown mark near the base, a 

 small mark on the scutellum near the apex, the sides of the metanotum 

 broadly yellow, and also the abdomen except for the following black 

 marks, namely, a large mark on the basal twothirds of the first segment, 

 the mark roundly incised laterally in the middle and with the apex 

 rounded; a large mark in the basal three-fourths of the second and 

 with a large incision, widest on the outer side, the bases of the fourth, 

 fifth and sixth segments and the seventh except for two marks at the 

 base. The base of the first ventral segment broadly, and of the second 

 narrowly yellow. Legs sulphur yellow, the coxae, trochanters, and base 

 of femora black above. Wings yellowish hyaline the apex infuscated, 

 the costa, stigma and basal nervures fulvous. Flagellum of antennae 

 reddish brown below, the hook long, stout and black. Male. Length 

 8 mm. to end of second segment. Orm b-y county, Nevada. July. 



Stout and broadly built. Clypeus longer than its greatest width, the 

 apex with a wide, shallow, rounded incision; the punctuation close and 



