CHARLES W. METZ. 115 



cheeks shallowly, striate-punctate. Mesoscutum very finely, densely 

 punctate, somewhat granular in appearance ; scutellum similarly but 

 more sparsely punctured ; metanotum finely rugose. Propodeum 

 lightly sculptured ; enclosure small ; bowl rather stout, surface not 

 pitted, almost smooth ; lateral face and sides almost smooth, micro- 

 scopically wrinkled ; posterior face not bordered by a raised ridge, 

 but rounded off. Mesopleura finely, densely punctured, rather rugu- 

 lose, like mesonotum ; metapleura similar. Abdomen impunctate, 

 dull, not shining. 



Yellow Markings. — Lateral face marks very large, filling lateral 

 areas, extending above in a broad projection following orbit, diverg- 

 ing from eye at level of base of antennal sockets, ending in a great 

 rounded, swollen apex, nearly as large as the scape, the two coming 

 quite close together above antennal sockets, (fig. 91). Scape with 

 front entirely yellow ; collar, except for small space at center, tuber- 

 cles and spot on tegulae yellow. Legs with front of fore tibiae, base 

 and apex of middle and hind tibiae, and all tarsi yellow. 



Genitalia. — Armature of the same type as that of P. rudbeckice but 

 much larger, (fig. 15). Seventh ventral plate large, similar to that of 

 P. riidbeckics, but wings long, with long, narrow basal portion as in 

 P. varifrons ; the tooth-like processes are short and only extend along 

 about half of the margin, (fig. 44). Eighth ventral plate identical 

 with that of P. rudbeckice, except in size, (fig. 49). 



Female. — Very similar to male in size, form, and sculpture. Scape 

 normal ; clypeus unusually narrow at base, being narrower than lateral 

 areas at that level ; supraclypeal area very short and broad (fig. 135). 



Sculpture. — Practically identical with that of male. 



Yellow Markings. — Lateral face marks short, broad, filling most of 

 lateral areas, but not extending above antennal sockets; spot on cly- 

 peus usually present. Thoracic markings as in the male. Marks on 

 legs limited to the base of tibiae. 



Habitat. — Ormsby county, Nev., and Santa Clara county, 

 Calif. Type locality the former. 



Specimens examined : 150. 



This species is nearest related to P. rudbeckice, but differs 

 very markedly in face marks, proportions of face, position 

 of antennal sockets, size of scape, long wings of seventh 

 ventral plate, etc., as shown above. The 150 specimens 

 from Nev. and Calif, show practically no variation, and are 

 all easily distinguished by the characters mentioned. The 

 peculiar, fine, granular puncturation of the thorax is very 

 characteristic, and not found in any other species. The 

 species is much larger than even the extreme forms of P. 



TRANS. AM. ENT. SOC, SXXVII. 



