.::; ENTOMOLOGICAL NEWS. [March 



Pronotum black. 



Face with a triangular white spot at lower angle of inner 

 orbits; clypeus white bidentate anteriorly, the anterior 

 edge and teeth black; mandibles except tips white; an- 

 terior femora beneath their tibia? and tarsi, and the mid- 

 dle and hind tibia? and tarsi, rufous. 



(3) D. bidentatus Asm., n. sp. 



Face black; clypeus anteriorly rulous, simple, not dentate; 

 mandibles except tips, anterior and middle tibia? and 

 tarsi, hind tarsi and usually the tip of abdon ci.. rufous. 



(4) I), foxii Atl.n:., n. sp. 



(1) D. ferrugineus, u. sp. 



$ Length 4.6 mm. Uniformly pale ferruginous, except apex 

 of mandibles, a spot between the ocelli and base of metathorax 

 above, which are black. The three or four apical abdominal seg- 

 ments are also more or less dusky or blackish. Wings hyaline, with 

 a large smoky blotch behind the third cubital cell and including 

 the apical half or more of the cell. Head and thorax, except meta- 

 thorax, smooth, polished. 



Hab. Colorado. Type, No. 5061, U. S. N". M. (Baker Toll.) 



(2) D. bidentatus, n. sp. 



9 Length 7 mm. Black; face with a triangular spot at base of 

 inner orbits, a narrow line beneath the eyes, the clypeus except 

 anterior margin, and the mandibles except tips, white. Clypeus 

 produced .anteriorly into two black teeth ; flagellum brownish 

 beneath ; legs black, the anterior femora beneath and all tibia? and 

 tarsi, rufous. The head anteriorly is closelv punctate, the vertex 

 coriaceous, with some scattered or sparse punctures; thorax .shining, 

 but sparsely punctate. Metathorax rugulose, opaque; abdomen 

 shining, but veiy delicately microscopically reticulated . Wings 

 hyaline, with a large smoky cloud behind the marginal cell and in- 

 cluding the apex of the cell ; stigma and veins piceous or dark 

 rufous. 



Hab. Colorado. Type, No. :><><;:;. I . S. N . M . ( Baker Coll. > 



(3) D. foxii, n. sp. 



$ Length 56.5 mm. Bhu-k: mandibles, except tips, the ante- 

 rior and middle tibite and tarsi, hind tarsi and terminal ahdrminal 

 segment, rufous. Wings subhyaline, with a dusky cloud behind 

 the truncate marginal cell. Hind tibia? behind. Avith a white line 

 formed of silver y white hairs. Head and thorax, except metathorax, 

 polished, impunctate; metathorax finely rugulosc. 



Hab. Colorado. Type, No. r.O*)!'. I" . S. X . M . < I'.akcr ( Wl.) 



