AMERICAN HYMENOPTERA. 199 



Odyiieriis (Pachyodernus) oslarensis sp. uov. 



Black, densely covered with a short pale pile, the pile on the top of the nieso- 

 notum tinged with fulvous; a small spot on the outer orbits near the top, two 

 short lines on the hinder edge of the pronotum, an irregular, more or less inter- 

 rupted line on the centre of the postseutelluni, a moderately broad line on the 

 apex of the basal two abdominal segments, and a uarrower, less distinct one on 

 the apex of the third, bright orange-yellow; the markings on the thorax paler 

 than those on the abdomen. Legs densely covered with a pale pile. Wings 

 obscured hyaline, fuscous violaceous in front, the nervures and stigma black. 

 9 . Length to end of second segment nearly 10 mm. 



Clypeus clearly longer than its greatest width ; the apex depressed, projecting, 

 slightly roundly incised, its sides thickened ; the punctuation is strong, close and 

 uniform ; the punctuation of the front and vertex is coarser, closer and more 

 rugose; there is a smooth, shining, triangular tubercle, furrowed in the middle, 

 between and shortly above the antennse. Thorax transver.<*e at the base and 

 apex, strongly closely punctured, the base of metapleura; smooth, the rest irreg- 

 ularly, obliquely striated. The two furrows on the apex of the mesonotum are 

 distinct, but not deep. Postscutellum clearly separated by a furrow behind ; it 

 is raised, rounded, coarsely rugosely punctured, its apical slope smooth, shining, 

 transverse. Metanotum irregularly shagreened, more strongly and obliquely 

 above ; in the middle above is a small, smooth, shining triangular area ; from its 

 centre and sides a keel runs down to near the middle, the part below them being 

 smooth, flat and slightly raised ; the sides at the angle above the middle project 

 into three teeth, of which the central is the larger. The first abdominal seg- 

 ment is weakly, the base of the second more strongly, its apex still more strongly 

 and the third to fifth coarsely rugosely punctured. 



Oslar : Congress, Arizona. 



In Saussure's arrangement this species would come near 0. cali- 

 fornicus. , 



Odynerus (Hypodernu!^) longipilosus sp. uov. 



Black; an irregular ovate mark on the sides of the clypeus above; a small 

 transverse oval mark over the antennte, a minute one behind the top of the eyes, 

 a line on the base of the thorax, the base and apex of tegulie, a small irregular 

 mark below the latter, and narrow but distinct lines on the apices of the basal 

 four aluiominal segments, the apical two narrower than the others, white, verj- 

 slightly tinged with yellow; the greater part of the tibite pale yellow, the tarsi 

 rufous. Wings hyaline, distinctly tinged with fulvous in front; the costa and 

 stigma rufo-fulvous. 9- Length 12 mm. 



Head, thorax and base of abdomen densely covered with long fuscous hair. 

 Clypeus pyriforni, as broad as long, its apex somewhat broad, almost transverse, 

 distinctly punctured ; the rest of the head and the thorax closely, strongly punc- 

 tured. Thorax fully twice longer than wide, its base not quite transverse, the 

 sides not projecting; the apex with the sides blunt. Parai)sidal furrows indica- 

 ted weakly in the middle; the middle of mesonotum broadly depressed at apex. 

 Apex of post-scutelluni transverse, aciculated. Base of first abdominal segment 

 smooth and shining below, rougher above, the suture not prominent; the seg- 

 ment above is bluntly rounded; the second segment square, finely niinutely 

 punctured ; the apices of the segments are flat. 



TRANS. AM. KNT. SOC. XXXIV. JULY, 1908. 



