84 THE CANADIAN ENTOMOLOGIST 



Cerceris snowi, n. sp. 



Males from Tucson, Arizona (Snow) and San Diego Co., Cal., (Van Duzee). 

 Black; lateral face marks, scape beneath, two spots on pronotum, the post- 

 scutellum, tegulse, apical bands on the second and following segments, cream 

 yellow, those on face nearly white; band on second segment much broader 

 than others which are narrow and may be broken each side; tibiae and extreme 

 tips of femora pale, a dark spot behind on mid and hind tibiae, the basitarsi 

 pale. Flagellum of antennae rather rufous beneath, especially toward tip. 

 Face below densely white-haired; clypeal margin at middle faintly tridentate; 

 enclosure smooth; the pygidial area elongate, about as in C. kennicotti. Head, 

 thorax, first and second segments very plainly hairy. One specimen has two 

 small spots on first segment, two have faint lateral spots on the scutellum. 



Length 8 mm. 



By small size and coarse punctuation related to C. erigoni and C. acan- 

 thophila, but distinct by having clypeus all black. 



Cerceris inter jecta, n. sp. 



Male from Lake Point, Utah, 18 July, (Titus). 



Black marked with yellow; first abdominal segment red above and below. 

 Face with middle clypeal spot not reaching lower margin, and lateral spots 

 yellow, sides of clypeus and the mandibles black; basal part of flagellum slightly 

 rufous beneath; two spots on pronotum, the postscutellum, and broad abdominal 

 bands, yellow, that on the second segment occupying one-half of the segment, 

 not emarginate; third, fourth and fifth broadly emarginate in front, but on sides 

 reaching the front margin of the segment, sixth with a small basal, median dark 

 spot; venter all black; legs black, the tibiae yellow in front, tarsi dark brown; 

 stigma yellowish; pygidium mostly rufous. Face very broad; clypeal margin 

 slightly rounded, hair-lobes very small; last joint of antenna as long as pre- 

 ceding, slightly curved; enclosure large, smooth, polished; pygidial area once 

 and one-half longer than broad, sides nearly parallel. Body moderately, coarsely 

 punctate; abdomen broad, basal segment. 



Length 10 mm. 

 Cerceris abbreviata, n. sp. 



Males from Yakima River, Little Spokane, and Umatilla, Washington, 

 June and July, (S. Henshaw). 



Black, marked with yellow, face, base of mandibles, scape beneath, dot 

 behind eyes, pronotum, tegulae, postscutellum, two spots on basal segment, 

 narrow bands, all about of the same width on following segments, yellow; three 

 pairs of ventral spots, usually connected; legs yellow, front and mid femora with 

 black spot near base, hind femora and tibiae black near tips; stigma yellowish; 

 flagellum rufous beneath, last joint of antenna rufous, slender, curved. Face 

 is narrower than C. occipitomaculata, the lateral lobes of clypeus being pro- 

 portionately higher. Clypeal margin truncate; enclcsure plainly longitudinally 

 striate, but on sides more oblique; basal segment of abdomen very broad ; pygidial 

 area elongate, the sides parallel; head and thorax short-haired. 



Length 8 mm. 



In appearance a C. nigrescens marked with bright yellow instead of white, 

 but a slightly smaller, and shorter bodied species. 



