CHARLES W. METZ. 133 



distance above antennal sockets, narrowing to eye margin. Thoracic 

 markings as in the male. Legs with very small spot at base of each 

 tibia, remainder black. 



P. episcopalis var. subtristis (Swk. and Ckll.). 



Male. — Differs from typical specimens only in having no 3'ellow on 

 scape, collar, or tegulse, and very little on tubercles, and having less 

 on labrum, mandibles and legs. 



Female. — Differs from typical form in having variable, smaller, face 

 marks, no yellow on collar, tegulse, or legs, except base of hind tibiae, 

 and in having more sparse punctures on abdomen. The extremes of 

 this are very large, rather stout, black forms, quite similar to females 

 oi P. varifrojis, (fig. 132). 



P. eiu.scopalis var. coquillettii (Ckll.). 



jl/a/i?.— Differs from typical episcopalis in having long lateral face 

 marks, extending almost to top of orbit, (fig. 104), almost entirely 

 yellow fore and hind tibise and tarsi, coarsely, confiuently punctured 

 abdomen, and smaller size. 



Female. — Abdomen almost impunctate ; pleura heavily punctured; 

 markings like those of typical form. Almost indistinguishable from 

 same sex of P. zizice, (fig. 139). 



Habitat. — So far as known the Western, and Southern 

 vStates. 



Specimens examined about 100, from Colo., N. M., Nev., 

 Calif., and Tex. Recorded on flowers of Pentstemon, Sym- 

 phoricarpus, Malvastrian, and DrymocaUis. Altitude records 

 range from 1000-8000 feet. 



This species apparently supplants modestiis and zizice in the 

 extreme Western States, and partly on the east slope of the 

 Rocky Mountains. Like the eastern species to which it is 

 nearly related it is quite variable in a number of characters. 

 The greatest difference between this and the eastern species 

 is its coarsely, shallowly punctured abdominal segments, 

 and the noticeably raised apices of these segments. These 

 characters are uniform in the series of fifty males before me, 

 except in the variety coquillettii , which can be distinguished 

 in other ways. The face markings of the male are quite 

 constant thruout, but the thoracic markings show a wide 

 variation. Present material falls into two groups on these 

 characters ; eleven specimens from Colorado agreeing with 

 the typical form, and thirty odd specimens, nearly all from 

 Ormsby county, Nevada, differing as follows : Somewhat 



TRANS. AM. ENT. SOC.XXXVIl. (17*) 



