22 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol.60. 



Ferrnginoiis; face, clypeus, lower cheeks, scape and pedicel be- 

 neath, pronotum, sciitellum and postscutellum yellowish; mandibles, 

 annulus occupying flagellar joints 10-17, tegulae, and subalar spot 

 white; legs testaceous, trochanters, front and middle tibiae basally, 

 and all tarsi except apical joints white; wings hyaline, venation 

 brown. 



Type locality. — Montgomery County, Pennsylvania. 



Type.— C?it. No. 24624, U.S.N.M. 



One female captured June 21. 



Tribe CREMASTINI. 

 (OLIGOTMEMA) DEMOPHORUS PRIMA Cushman. 



Since the description of this genus and species was written I have 

 found in the miscellaneous material in the National Museum 3 

 additional females and 54 males. These are all from the Baker 

 collection and all from Colorado. 



The male differs from the female practically only in the form of 

 the abdomen. In the male this is narrower and has the tergites 

 beyond the third less strongly retracted, though together not much 

 longer than the third. 



I am indebted to Dr. A. Roman, to whom paratypes of this species 

 were sent, for the correct placing of the species in Demophorus 

 Thomson. 



CREMASTUS (ZALEPTOPYGUS) CHAMPLAINI, new species. 



Because of the entirely ferruginous coxae this species will not run 

 in my key ^^ to the neighborhood of its closest relative, doi^cdschemae 

 Cushman. 



The most striking differences between this and darcaschemae are 

 found in the clypeus and the petiole of the abdomen. In the present 

 species the clypeus is elevated medially just before the apex, some- 

 times almost conically, and impressed laterally (in dorcaschemae 

 there is the merest trace of this structure). In chaniplaini the petiole 

 is much more distinctly decurved than in dorcaschemae. 



Female. — Length. 10 mm. ; antennae, 6.5 mm. ; ovipositor, 2.5 mm. 



Head from above transversely oblong, the temples straight for 

 a short distance, then rather suddenly changing to nearly perpendi- 

 cular to the longitudinal axis of body; from in front transversely 

 suboval, distinctly broader than long, with the eyes large and 

 prominent, but separated by their own greatest length and slightly 

 divergent below ; head opaque, sparsely and finely punctate on f rons, 

 vertex, and temples, more densely and coarsely so on face; clypeus 

 shining, very weakly and sparsely punctate; malar space two-thirds 

 basal width of mandible; diameter of ocellus and postocellar and 



^ Proc. U. S. Nat. Mus., vol. 53, 1917, pp. 511-516. 



