134 S. A. ROHWER. 



The tridentate mandibles would run this into Fox's group 

 asopus, but it lacks the ventral carina on the second segment 

 which that group has. Of the species in that group it is most 

 closely related to asopus Cress., but is at once distinguished 

 from that species by its smaller size and the black hair of the 

 second segment. Disregarding the mandibles, it should, I 

 think, be placed in group occidentalis. If sought for in this 

 group it would run to bioculata Cress., but differs from that 

 species in the entirely ferruginous first and second abdominal 

 segments, the larger punctures of the second segment. The 

 presence of the facets on the eyes seem to exclude it from the 

 occidentalis group. Perhaps the group asopus should be made 

 to include this species. 



Proctotrypes florissantensis n. sp. 



Female. — Length of body 4 mm.; length of stylus 1.5 mm. Clypeus 

 produced into a broad, rounded lobe; eyes large, ovate; palpi long, 

 fourth joint the longest. Head smooth, polished; a distinct furrow 

 from the anterior ocellus. Metanotum shining, covered with short, 

 white hair. Mesopleurae finely transversely striated. Metathorax 

 coarsely rugose; a distinct median carina; sloping off gradually pos- 

 terior to some distance beyond the attachment of the posterior coxae. 

 Posterior femora somewhat enlarged at apex; a little shorter than the 

 posterior tibias. Discoidal nervures visible as fuscous streaks. An- 

 tennae simple; third and fourth joints equal. Abdomen and stylus 

 smooth, highly polished. Black; mandibles, tegulas, legs beyond the 

 coxae (femora somewhat piceous) , small spot at base of abdomen above, 

 and stylus rufous; palpi brownish; venter of abdomen ferruginous. 

 Wings slightly dusky-hyaline, iridescent; stigma and nervures dark 

 fuscous. 



Male. — Length 5 mm. The male differs from the female in having 

 the lateral ocelli on small tubercles, having a large rufous spot on the 

 abdomen above, and the wings somewhat clearer. The antennas are 

 simple; the carina of the metathorax is quite distinct. 



Habitat.— Florissant, Colo., 9 , June 22, 1908 (S. A. Roh- 

 wer), % , June 13, 1908 (T. D. A. Cockerell), $ , June 28, 1908 

 (S. A. Rohwer). 



In Ashmead's monograph of the N. Am. Proctotrepidae 

 (Bui. 45, U. S. Nat. Mus.) P. florissantensis run out between 

 P. californicus Holmgr. and P. obliquus Ashm. It differs 

 from both in having the rufous spot on the dorsal, basal part 

 of the abdomen, and from P. californicus in having the an- 

 tennae of the S simple. From P. obliquus it may be known 

 by the central carina on the metathorax. 



