324 THE CANADIAN KNTOMOLOGIST. 



subhyaline, marginal cell and surrounding area somewhat fuscous ; vena- 

 tion pale brown, stigma and costa reddish-yellow ; anterior margin of 

 clypeus wiih a fringe of silvery hairs ; thorax and abdomen above with 

 few scattered hairs. 



Habitat. — Las Cruces, N. M., Aug. 3 (C. T. H. Tovvnsend), fls. of 

 Solidago Caiiadetisis. 



This species is wtdiX feimir-vibntm, Vier. andCkll.,but the enclosure 

 of the metathorax is punctured with large punctures, not smooth in the 

 middle ; the metathorax is witliout spots, etc. 



Cerceris argyrotricha, n. sp. — $ . Length, 1 1 mm. Head as wide as 

 thorax, rather closely punctured with large punctures ; facial quadrangle 

 broader than long; distance between the eyes at antennae greater than the 

 length of the eyes ; ocelli in a low triangle, distance between the lateral 

 ones about equal to the distance of the nearest eye margin; carina between 

 the antennae prominent; third joint of antennae about equal in length to 

 fourth ; clypeus punctured like front, anterior margin with two very small 

 teeth ; thorax, except enclosure, with large rather close punctures ; 

 enclosure closely, finely punctured, middle furrow distinct, four anterior 

 femora rather robust ; anterior tarsi on outside with long bristles, on inside 

 with a comb of short hairs ; posterior tibiae on outer margin strongly 

 serrate; first joint of posterior tarsia little longer than 2 + 3 + 4; dorsal 

 segments of abdomen coarsely, closely punctured, punctures on first two 

 segments larger ; ventral segment with very few punctures ; pygidium 

 about three limes as long as the width at base, at apex truncate, closely, 

 finely punctured. Colour ferruginous ; apex of mandibles, apical half of 

 antennae, front above antennae (except two ferruginous spots on superior 

 orbits), a basal, triangular spot on dorsal abdominal segments three and 

 four (this spot is dark brown), black; clypeus, face to a little above the 

 level of antennae, elongate spots, pronotum, postscutellum, broad band on 

 second dorsal segment, and following dorsal segment, except spots above 

 mentioned, tegulae in part, yellow; wings subhyaline, darker along 

 margin ; venation brown, stigma yellowish ; face in front, thorax beneath, 

 legs, especially tarsi, and more especially the hind tarsi, with silvery 

 pubescence. 



Habitat.— h-AS Cruces, N. M., Aug. 11 (C. T. H. Townsend). 



This is quite a distinct species. In Viereck's and Cockerell's table of 

 New Mexico Cerceris {]n. N. Y. Ent. Soc, Sept., 1904), it runs out at 7 

 because of the yellow clypeus and truncate pygidium. 



