OSTEN SACKEN ON WESTERN DIPTERA. 259 



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for which the erection of a uew genus will perhaps be necessary. It 

 has the characters of Lordotus, eslcept the general shape of the body, 

 which is much less gibbose. The venation is exactly like that of 

 Lordotus, including the remarkable sweep of the second vein. The 

 second joint of the antennne is comparatively shorter, as it is but little 

 longer than broad. 



Male. — Thorax clothed with yellowish-gray, abdomen with whitish 

 pile ; legs and antenme black, the former densely clothed with an 

 appressed white scale-like tomentum. Length 7-8™™, 



AnteunjB black, the first two joints beset with black pile, especially 

 long on the under side ; cheeks and face with grayish pile, with an 

 admixture of black hairs in the mystax ; the small frontal triangle 

 clothed with whitish pollen ; occiput with pale yellowish-gray pile. 

 The grayish-black ground-color of the body is concealed under a dense 

 covering of dull yellowish -gray pile on the thorax and of white pile on 

 the abdomen. Knob of halteres yellowish-white. Wings subhyaline ; 

 veins brown, those nearer to the base and to the costa yellowish-brown ; 

 a darker spot on the first vein, at the junction of the cross-vein at the 

 proximal end of the first basal cell ; a similar spot, with a vestige of a 

 cloud, on the prsefurca; vestiges of clouds on the large and small 

 cross-veins. 



Mab. — Marin County, California (H. Edwards). A single male. 



Sparnopolius. 



1. Sparnopolius coloradensis Grote, Proc. Entom. Soc. Phil, vi, 

 p. 44:5. — Mr. Grote describes the female ; the male stands in the same 

 relation to it as the male of S. fulvus to its female ; it is more slender 

 in shape, and paler yellow; less fulvous in the coloring of its pile; the 

 hairs on the autenual scapus are black. In the female, those hairs are 

 variable in color, in some specimens black, in others mixed with bright 

 fulvous ones ; in others again the fulvous pile prevails. I have a num- 

 ber of specimens collected about Colorado Springs by Mr. Uhler. 



2. Sparnopolius brevicornis Loew, Centur., x, 43. — Waco, Texas ; 

 female. I have specimens of both sexes from the same locality. This 

 species is exceedingly like the preceding ; antennae and proboscis, in 

 my specimens at least, are shorter; the costal cell a little more yellow- 

 ish ; the fur a little less dense, especially in the female. I do not per- 

 ceive any other differences. 



3. Sparnopolius cujiatilis Grote, Proc. Entom. Soc. Phil., vi, p. 

 445. — Colorado ; female. I have never seen this species. 



4. Sparnopolius fulvus Wied., i, 347 (syn. Bomhylius Llierminieri 

 Macq., D. E., ii, 1, 103; Bomhylms brevivostris Macq., 1. c). — A well- 

 known species from the Atlantic States. 



