MONOGRAPH OF THE NORTH AMERICAN PROOTOTRYPID^E. 93 



TABLE OF SPECIES. 



FKMALKS. 



Entirely Mack, the lo-^s rufous 2 



Ferrns^iuons, ahdoiiieu alouo Ithick. 



Wiu,|?8 liyalinc, with a fuscidis band bcnoath Mtignia ('. atkivkntuis Cr. 



2. Wings liyaliuc, with a fuscous baud beneath the stigma. 



Clypeus rufous; mandibles rufous, 4-ilentate, 0. hf:nsiia\vi sjt. nov. 



Clypeus black; mandibles white, 3-dentate C. canadensis sp. nov. 



Chelogynus atriventris Creas. 



Dryiniia atriventris Cr., Trans. Am. Ent. Soc, iv, p, 193, $ ; Ashni., Ent. Am., 

 Ill, p. 74; Cr., Syn. Ilym., p. 216. 



9. Lengtli, 4.5""". Ferruginous, with palo glittering pubescence; 

 head much broader than thorax; face, mandibles, and base of scape 

 beneath, pale jellowisli; tips of antenna', blackish; pleura with dense 

 silvery pubescence; metathora.v rugulose, posterior face depressed and 

 transversely aciculated; wings liyaline, with a dusky band beneath 

 stiguni; posterior tibiae blackish at tips, their tarsi pale; abdomeu 

 black, smooth, and polished. 



Habitat. — Texas. 



Type ? in Coll. Araer. Ent. Soc. 



Chelogynus Henshaw^i sp. nov. 



9 . Length, 5'""'. Black, shining; head and prothorax ttnely rugose; 

 iiicsonotum and scutellum smooth, polished; metathorax coarsely ru- 

 gose. Antennie and legs pale rufims; the C terminal joints of the 

 antenna' fuscous, and the posterior femora towards apex above have a 

 large black spot. The antenna; are 10-Jointed, filiform, the first flagellar 

 joint the longest, alxmt one-third longer than the scape. Clypeus and 

 mandibles rufi)us, the latter 4 dentate. Mesonotum with two shaiply 

 d<'fined furrows. Tegular rufous. Wings hyaline, with two fuscous 

 I inds, one at the basal nervure^ the other below the upper half of the 

 stii^raa; veins pale brown. Anterior femora much swollen, the tarsi 

 with large pincher-like claws, as long as the tibijc, and fringed with stiff 

 bristles on the inside. 



Habitat. — Milton, Mass. 



Ty])e 9 in Coll. Ashmead. 



Described from a single s])e(!imen received from Mr. Saml. TIenshaw. 

 It is the only species I have seen with 4-dentate uuindibles. 



Chelogynus canadensis sp. nov. 

 (PI. VI, Fig. 1, 9.) 



5. Length, 2.5""". Black; head and collar vary finely punctate, 

 the mesonotum and scutellum smooth, the former with two furrows; 

 metathorax rugose. Face sparsely covered with glittering silvery 

 hairs. Mandibles and ]>ali)i white. Antenna' 10 jointed, brown, the 

 first flagellar joint about half the length of the scape, the remaining 



