230 P- CAMERON. 



Folistes aurifer Sauss. 



This species has been taken by Prof. Baker at Oslar, Las Vegas, 

 New Mexico; Oslar, Durango, Gala., and Ornisby Co., Nevada, 

 including the undescribed male. The latter has the malar space as 

 long as the third antennal joint ; the clypeus is flat, distinctly longer 

 than its greatest width ; its apex is trilobate, the middle lobe being 

 more prominent than the lateral ; the uppei; bordering furrows are 

 oblique, slightly curved and end at the bottom of the eyes; the 

 upper transverse one is much less distinct ; the frontal keel is broad, 

 prominent, narrowed in the middle. The four anterior legs are 

 yellow, except on the upper part of the femora. The third antennal 

 joint is as long as the following two united ; the apical are flat 

 below, rounded above ; the last thinner and about one-fourth. As 

 in the 9 , the size of the yellow thoracic marking varies, as does 

 also the rufous ones. One S has two Xeuos attached to the penul- 

 timate abdominal. 



The two marks or lines on the metanotum may be absent or rep- 

 resented by two small spots. 



EUMENID^. 



^'' Ancistrocerus beliiBeiisis sp. uov. 



Black, shining, covered with a short, white down ; the clypeus, base of mandi- 

 bles, a narrow interrnpted line over the antenna', a narrow line on the lower half 

 of the eye incision, a small spot near the top of the outer orbits, a line, broadly 

 interrupted in the middle, on the base of thorax, postscutelluni, a broad curved 

 line on the lower part of apical slope, an irregular spot on the pleura; below the 

 tegulse, a line on the top of first abdominal segment, one all round on the apex 

 of second, both of equal width, and the underside of antennal scape, whitish yel- 

 low. Femora and tibije tinged with fuscous below. Wings fuscous-violaceous, 

 paler at the base, the nervures and stigma black; tegulte black, with a small 

 white spot at the apex. % . Length 7 mm. 



Flagellum of anteuuse brownish ; it becomes distinctly thickened towards the 

 apex; the last joint is thinner than the jienultiniate and ends in a slightly 

 curved hook, a little narrowed towards the apex, and which is straight, not 

 curved as usual. Clypeus longer than wide, strongly, but not closely punctured, 

 the apex transverse. Base of thorax transverse, raised, the edges slightly pro- 

 jecting. Apex of postscutelluni black, rounded. Sides of metanotum irregularly 

 reticulated above; their centre roundly dilated, with a smaller projection below; 

 the centre is depressed and closely transversely striated. Base of first abdomi- 

 nal segment with a strong keel, which below is continued along the sides to the 

 apex. Second segment longer than wide, obliquely depressed at the base above ; 

 the apex in the centre above with a broad, raised band, which is clearly defined 

 by a furrow at the base; the apex is bordered by a crenulated furrow ; the basal 

 segment is reddish below. 



