56 ENTOMOLOGICAL NEWS. [March 



Pronotuni black. 



Face with a triangular white spot at lower angle of inner 

 orbits; clypeus white bidentate anteriorly. Ihe anferior 

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

 terior femora beneath their tibiae and tarsi, and the raid- 

 die and bind tibiag and tarsi, rufous. 



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



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

 mandibles except tips, anterior and middle tibiae and 

 tarsi, hind tarsi and usually the tip of abdon:cL, rufous. 



(4) D- foxii AfLu!., n. sp. 



(1) D. ferrugineus, n. sp. 



9 Length 4.6 mm. Uniformly pale ferruginous, except apex 

 of mandibles, a spot betweeu 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 snioky 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, Xo. 5061, U. S. N. M. (Baker Coll.) 



(2) 0. bidentatus, n. sp. 



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

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

 anterior mai'gin, and the mandibles except tips, white. Clypeus 

 produced anteriorly into two black teeth ; flagellum brownish 

 beneath ; legs black, the anterior femora beneath and all tibiae and 

 tarsi, rufous. The head anteriorly is closely 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 lai'ge 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. 5063, U. S. :N^. M. (Baker Coll.) 



(3) D. foxii, n. sp. 



9 Length 5—6.5 mm. Black; mandibles, except tips, the ante- 

 rior and middle tibiae and tarsi, hind tarsi and terminal abdominal 

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

 the truncate marginal cell. Hind tibiae behind, with a white line 

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

 polished, imjiunctate; metathorax finely rugulose. 



Hab.— Colorado. Type, Xo. 5062, U. S. N. M. (Baker Coll.) 



