140 HYMENOPTERA. 



abruptly, slightly concave, with sharp ridge on lateral and superior 

 borders as in asininus. Scape short, stout, but not swollen ; poste- 

 rior side concave, flagellum normal ; clypeus long, broad at apex, 

 almost touching eyes, making apices of lateral face marks very narrow 

 and pointed below ; face rather broad, narrowed rapidly below. 



Sculpture. — Head, thorax, and abdomen heavily punctured. Front, 

 vertex, and occiput with immense, confluent punctures, like those of 

 asinhius, continuing quite heavy down on to cheeks. Mesoscutum 

 with large, round, deep punctures, smaller than those of front, sepa- 

 rated by less than the diameter of one puncture, usually very much 

 less ; scutellum similarly but more sparsely punctured ; metanotum 

 narrow, roughened. Propodeum similar to that of asininus but pits 

 smaller. Mesopleura mainly punctured like mesoscutum, but becom- 

 ing rugulose dorsad and cephalad ; metapleura rugose striate. Abdo- 

 men coarsely punctured, first segment siinilarly to mesoscutum, but 

 punctures slightly smaller and more separated ; punctures on remain- 

 ing segments still smaller, but quite dense. 



Yellow Markings. — Face marks clear cut, distinct ; supraclypeal 

 mark extending above antennal sockets, longer than broad ; lateral 

 marks very narrow at apex of clypeus, filling lateral areas, following 

 outline of antennal sockets, broadening slightly above, then tapering 

 off evenly to tip on eye margin, about two-thirds the length of scape 

 above antennal sockets. Base of clypeus slightly narrower than lateral 

 marks at same level. Yellow on collar broken in center; tubercles, 

 tegulae, and wing bases with yellow spots. Anterior tibiae in front, 

 middle and hind tibiae, except a subapical ring, and all tarsi yellow, 

 (fig. 111). 



Genitalia . — Armature similar to that of P. asininus ; seventh ventral 

 plate without any membranous attachments ; each wing being pointed 

 at tip, broadening medially, and lobed at base ; lobe short and sparsely 

 pubescent, (fig. 60). Eighth ventral plate similar to that of P. asini- 

 nus, but short and stout, (fig. 68). 



Female. — Very small, with dense puncturation similar to that of 

 male, except on abdomen where the punctures are small, fine and 

 close on all but basal segment. Differs from female of P. cressoni in 

 puncturation, yellow on collar, and face marks; from female of P. 

 wootoni by its very small size, heavy, large punctures, especially on 

 head and pleura, and in the short, narrow lateral face marks, (fig. 

 116). 



Habitat. — Type of male from Filmore Canyon, Colo., Aug. 

 27, (Coll. Cockerell). Female from White Mountains, N. M. 

 (Coll. Townsend, in Cockerell Collection). 



The unique male type of this species is marked " P. asini- 

 nus var." by Professor Cockerell, but is quite distinct from 



