12 PROCEEDIlSrGS OF THE NATIONAL, MUSEUM. vol.60. 



punctate below, very sparsely, weakly so above ; mesopleural furrow 

 not crenulate ; propodeum barely arched, polished behind and medi- 

 ally at base, without carinae but with a weak median furrow ; punc- 

 tation, impressions, and elevations of tergites weak, the first tergite 

 practically noncarinate, the carinate flattened beyond the anterior 

 angles; ovipositor shorter, more slender and tapering, and less 

 strongly curved. 



Face black except for minute reddish spot below each antenna and 

 an orbital spot opposite these; upper orbits narrowly yellow from 

 inner eye emargination to top of eye with a brief interruption oppo- 

 site the ocellus; thorax black with mesopleura, except large spot 

 below posterior wing, mesosternum, metapleura, scutellum, parap- 

 sides, and anterior lateral angles of prescutum, testaceous ; scutellum 

 and postscutellum tipped with j^ellowish white ; white dorsal margin 

 of pronotum extending beyond notauli ; legs similarly colored except 

 that apical annulus of tibia is prolonged below to base and the tarsi 

 are not distinctly annulated. 



A single female paratype differs from the type only in size, having 

 the following measurements : length, 5.5 mm. ; antennae, 4 mm. ; 

 ovipositor, 1.25 mm. 



Type locality. — Mountain View, California, 



Host. — "On spider nest." 



Type.—Q^i. No. 20059, U.S.N.M. 



Described from the above two specimens reared from the host in 

 July, 1898 (Ehrhorn), under No. 8524o\ 



CLISTOPYGA MANNI, new species. 



Closely related to nigrifrons Cushman, but larger, more slender, 

 and with more slender legs. Compared with the above description 

 of maculifrons Cushman differs as follows: 



Female. — Length 8 mm., antennae 6 mm., ovipositor 1.6 mm. Face 

 wealdy punctate, frons polished, impunctate ; malar space as long as 

 basal width of mandible ; postocellar line distinctly longer than ocell- 

 ocular line, the latter subequal to greatest diameter of lateral ocellus ; 

 thorax highly polished, only very obscurely punctate; propodeum 

 weakly arched, with a median groove but without carinae; meso- 

 pleural furrow not crenulate; nervellus broken at lower fourth; 

 abdomen shining, the punctation sparser and less deep ; first tergite 

 with dorsal carinae obsolete beyond summit; apical impression and 

 lateral elevation less distinct; ovipositor slender, straight to beyond 

 middle. 



Head black with distinct orbital markings extending from top of 

 eye to malar space; cheeks also white; a small spot on face below 

 each antenna; clypeus, mandible at base, palpi, scape and pedicel 

 below whitish ; thorax mostly red, with pronotum below, propleura, 



