AMKRK'AN HYMENOPTKRA. 217 



part of the anterior coxse, the four posterior hehiiid. the basal half of the four 

 anterior femora and the posterior entirely to shortly beyond the middle, black. 

 Flaorellum brownish below. Wings hyaline, siifTused with fulvous on the basal 

 half, the apex smoky violaceous; the costa and stigma fulvt)us. % . Length to 

 end of second abdominal segments mm. 



Head and thorax densely covered with long fuscous pubescence; the abdomen 

 with shorter pubescence. Clypeus pyriforni, clearly longer than broad, its apex 

 with a rounded, wider than long incision; the puncturation is strong, but not 

 close ; on the front and vertex it is strong and close, as it is also on the pro- and 

 mesothorax. There is a smooth distinct furrow down the centre of the scutel- 

 lum. Apex of postscutellum broadly rounded. There is a smooth, longer than 

 it is wide at the base, triangular area at the base of tlie nietanotum ; the upper 

 lateral angles are bordered by a distinctly raised and defined border, which be- 

 low, in the middle of the nietanotum, projects into a stout triangular tooth, 

 the upper part shorter than the lower. First abdominal segment cup-shaped, 

 broadly rounded at the base, the apex with a smooth raised border, which is bor- 

 dered behind by a line of deep foveas; the second is as long as it is wide, 

 roundly narrowed at the base, its apex stoutly reflexed, as is also the case with 

 the third ; the puncturation is strong and close. Antennal hook rufous, not ex- 

 tending much beyond the base of the tenth joint. Base of thorax transverse, 

 the sides shortly but distinctly projecting. 



Duraiigo, Colorado, May (Oslar). 

 Belongs to the group of stdphureus Sauss. 



^^Aiici>*lrocerus truncatu»$ sp. nov. 



Black ; a broad line on the top of the clyj)eus, a small mark, longer than wide, 

 transverse above and below above the antennae, an irregular mark on the inner 

 corner of the eye incision, a short narrow line on the base of mandibles, a longer, 

 broader one behind the top of the eyes, a large triangular mark on the sides of 

 the pronotum at the apex, a small squarish mark in the middle of the mesonotuni 

 at the apex, a conical mark on the sides below the tegulse, postscutellum. the 

 outer edges of the metanotuni broadly, lines on the apices of the abdominal seg- 

 ments, a broad oblique mark on the outer edge of the first, joining the apical 

 band and a large, transversely oval mark on the sides of the second, pale yellow. 

 Legs black ; the apical half of the four front femora from near the middle behind 

 and more narrowly in front, the posterior at the extreme apex and the tibite and 

 tarsi yellow; the tarsi suffused with fulvous. Wings hyaline, iridescent, the 

 radial cellule violaceous, the nervures and stigma black. 9 • Length 9 mm. 



Head and thorax closely, distinctly punctured, the metapleuiii; smooth at the 

 base, the rest closely, obliquely striated. Clypeus longer than it is wide, its apex 

 transverse. Base of thorax transverse, the sides not projecting. Apex of post- 

 .scutelluni rounded. Sides of nietanotum rounded, not margined. The second 

 abdominal segment square, its apex smooth, slightly raised. The pubescence is 

 short and sparse, the underside of the scape yellow. 



Berkeley, Colorado, June (Oslar). 



There is an example of what is probably the S from Las ^'egas, 

 New Mexico. It has the clypeus yellow, transverse at the apex ; 



TRANS. AM. ENT. SOC, XXXIV. (28) JULY, 1908. 



