CHARLES W. METZ. 131 



lateral face marks broadened and squarely truncate at ends ' ' , 

 (fig. 102), and quite strongly punctured first abdominal seg- 

 ment, (not always true). The seventh ventral plate, at least 

 in some specimens is broader than usual, (fig. 30). 



Habitat. — About the same as that of P. niodestiis. 



Specimens examined : About 60. Localities represented : 

 111., Mass., Me., Kans., N. J., La. and Queb. Recorded on 

 flowers of Solidago, adtivated raspberry, cultivated blackberry , 

 Castanea, Lornatiiim, Rubiis, Symphoricarpus, and Melilotus. 



The males of this species are usually very distinct and 

 easily recognized by their face marks ; and can always be 

 distinguished by the characters of the seventh ventral plate. 

 Some specimens lack the yellow stripe on the scape, and 

 many are without yellow on the tegulae and labrum. Appar- 

 ently the variation is less in this species than in P. niodestus, 

 but a much larger series will have to be obtained before this 

 can be established. In range it is not distinct from P. niodes- 

 t2is, as some writers have thought, but coincides with it, so 

 far as can be judged from the present data. 



In the female sex separation is much more difficult than 

 among the males, in fact it is only the well marked, typical 

 forms that can be separated with any certainty at all. I have 

 specimens taken at the same time and place with typical 

 males, but which are indistinguishable from specimens of P. 

 modestus. Probably many of those included under the latter 

 belong to this species, but as the other is the more variable 

 species in the males I have placed the questionable ones 

 under it. Unless some new characters are discovered for dif- 

 ferentiation these will have to remain as intermediates. 



PROSOPIS EPISCOPALIS Ckll. 1896. 

 m'^^. P. episcopalis, CU\. Psyche Supp. 7:29. 

 1901. P. episcopalis, Lov. Ent. News. 12:8. 



Syn. P. universitatis, Ckll. 

 1906. P. imiversitatis, Ckll. Ann. and Mag. Nat. Hist. Ser. VII. 

 17 :225. 



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

 1910. P. subtristis, Swk. and Ckll. Ent. News. 21 : 70. 



TRANS. AM. ENT. SOC. , XXX VH. 



