188 WILLIAM J. FOX. 



but not dilated, hind and medial tibia" but feebly spinose ; abdomen longer than 

 head and thorax united, last dorsal segment most strongly punctured. Black; 

 scape entirely, clypeus, mandibles, palpi and surrounding parts, pi-onotum, tuber- 

 cles, spot on scutellum, prosternum, mesosternum anteriorly, fore and medial 

 coxse and trochanters, fore femora, except a line behind, medial femora in front 

 and a medial stripe behind, fore and medial tibige, except a stripe within, hind 

 tibije basally and on inner side, fore and medial tarsi and greater part of hind 

 pair, bright yellow: clypeus with silvery pubescence: thorax beneath with pale 

 pubescence; abdomen with a sparse, silvery sericeous pile. Length about 6 mm. 



Nevada (Morrison). May be the % of incavus, but the fact of 

 color markings being so strikingly different induces me to consider 

 it as different. 



70. Crabro iiicavus n. sp. 



9- — Anterior margin of clypeus indistinctly dentate laterally, with a niedi il 

 production ; head finely punctured, the front less strongly than in the other spe- 

 cies of this section ; space between hind ocelli somewhat less than that between 

 them and the nearest eye-margin ; a distinct impressed line runs back from the 

 fore ocellus; first joint of flagellum nearly one-third longer than the second; 

 pronotum indistinctly crested; at the sides obtusely angular ; dorsulum with the 

 punctures less close than those of the front; episternal suture of mesopleurie 

 sinuous; middle segment with the basal excavated portion including at least one- 

 half of the enclosed area and with coarse, somewhat radiating strife, the medial 

 furrow of upper surface broad, with a few transverse strise basally, posterior face 

 not striated or roughened, the lateral ridges distinct, particularly beneath, their 

 outer furrow not foveolated or strongly marked; abdomen about as long as head 

 and thorax united, at auy rate not longer, microscopically punctured, the first 

 segment almost evenly united with the second ; pygidium with large, scattered 

 punctures. Black ; mandibles apically, reddish ; scape in front, line on pronotum, 

 tubercles, minute spot on scutellum, fore and medial femora at tips, anterior tibiie 

 in front, the remaining pairs basally, first two joints of fore and medial tarsi and 

 first joint of hind tarsi, except apex, yellowish; clypeus, inner orbits beneath, 

 cheeks and thorax on sides and beneath sparsely, with silvery pubescence ; legs 

 and abdomen with a sparse, silvery sericeous pile ; wings subhyaline, i)aler basally, 

 iridescent, nervures brownish. Length 5.5 mm. 



Colorado (Morrison ). The characters of the metatliorux distin- 

 guish this species at once from its allies. 



71. Crabro niiiiiinu!« Pack. 



Blepharipus minimus Pac^kard, Proc. Ent. Soc. vi, p. 377, 9 % ■ 

 9 . — Anterior margin of clypeus dentate laterally and with a distinct promi- 

 nence medially ; head punctured as usual in species of this section ; no im])ressed 

 line extending from fore ocellus to occiput; first joint of flagellum distinctly 

 longer than the second ; pronotum narrowly crested, at the sides angular ; punc- 

 tures of mesopleurse a little stronger and more separ'ated than those of the dor- 

 sulum. the episternal suture a little curved ; basal excavation of middle segment 

 well marked, and, with the lines forming the enclosure, foveolate, the longitu- 

 dinal fui-row, however, not foveolate, the convexities within the enclosure micro- 

 sco])ically striated as in projiinqiuis. posterior face apparently finely roughened, or 



