192 WILLIAM J. FOX. 



16. Group hispid i(s. 



A single .species', differing from those of ater group by the broad, 

 non-excavated pygidium, and from those of mimiims group by the 

 very low triangle which the ocelli form, hairy head and thorax, and 

 the recurrent vein being received by the submarginal cell in its apical 

 third. The S is unknown, but will probably present group charac- 

 teristics similar to those of the female. 



77. Crabro hispidus n. sp. 



^ . — Clypeus strongly carinated, the anterior niargiu with the hroadly produced 

 portion incurved medially ; vertex finely puuctured, tbe front above the depres- 

 sion opaque, and has the appearance of being striato-puuctate ; frontal depression 

 broad and glabrous ; ocelli in a low triangle, but not quite forming a curved line, 

 space between hind pair somewhat less than that between them and the nearest 

 eye-margin ; first joint of flagellum about one-third longer than the second ; 

 pronotnm at the sides anteriorly with a blant tooth ; dorsulum with rather coarse, 

 shallow punctures, longitudinally striated apically; mesopleurae with sparse 

 punctures ; middle segment without a basal enclosure, rugose, particularly above, 

 the longitudinal furrow on upper surface not reaching the base and bounded by 

 a strong ridge at either side, lateral ridges of posterior face indistinct, sides of 

 middle segment tolerably smooth ; tibiae strongly spinose ; wings fusco-hyaline, 

 iridescent, nervures and stigma black, the recurrent vein received by the sub- 

 marginal cell between middle and apex ; abdomen microscopically punctured, 

 apical segments most distinctly, ventrally almost impunctate; pygidium trian- 

 gular, rounded apically, coarsely punctured, flat. Black ; tarsi and apical margin 

 of ventral abdominal segments testaceous; head, particularly between frontal 

 depression and vertex, and thorax above with coarse, dark fuscous hair, that on 

 under part of thorax and femoi-a, pale ; clypeus only with silvery pubescence. 

 Length 9 mm. 



Mt. Hood, Oregon. One specimen. 



17. Group insolens. 



Pronotum anteriorly with a strong crest, which terminates later- 

 ally in a sharp tooth or projection ; abdomen short, ovate, first seg- 

 ment broad ; pygidium narrowed to the apex, acute, depressed or 

 excavated apically. The head is almost square above, but this may 

 be but a specific character. 



78. Crabro insolent u. sp. 



9 .—Head broader than the thorax, almost square above, in consequence of its 

 length almost equaling its width, apparently impunctate; ocelli forming a trian- 

 gle, the space between the hind pair slightly greater than that between them and 

 the nearest eye-margin ; frontal depression deep, but no impressed line extending 

 to the fore ocellus; pronotum with a strongly marked, transver.se impression on 

 each side, anteriorly with a strong crest, which terminates laterally in an acute 

 tooth or projection, and is highest medially ; dorsulum impunctate, without the 



