14 S. W. WILLISTON. M. I». 



the latter more brownish red. Wings hyaline in the basal half, distinctly clouded 

 with brownish on the distal half; the veins from the margin of the second longi- 

 tudinal to the beginning of the posterior basal transverse, narrowly but distinctly 

 clouded with brown, the veins at base of the second submarginal, and the first 

 and second posterior cells less distinctly clouded. 



One specimen, Mt. Hood, Oregon. 



This species will fall with -C. profusKS in Osten Sacken's synoptical 

 table, but its relationship is apparently closer to C. posit itinm 0. S. 



20. Cyrtopogon ? nebulo Osten Sacken, West. Dipt., .309. 



Two specimens from Washington Territory I believe belong here ; they 

 agree perfectly with the description, except that the style is a trifle shorter 

 than the third joint. 



21 ? Cyrtopogoii n. sp. (Plate I, fig. 11.) 



Resembles mhpdo very much, but has the third joint of the antennae 

 and the style very slender, linear, the face less gibbose, deep shining 

 greenish black abdomen, and the body more thickly pilose. The size and 

 wings are the same. I identified it at first as nebulo before I had seen 

 the Washington Terr, examples. Ten specimens, Como, Wyoming, (alt 

 8000 ft. ). 



22. ?Cyrtopogon [f D.iulopogon) n. sp. (Plate I, fig. 10.) 



Has the wings of the two preceding, but the face more gib- 

 bose. the gibbosity rather lower, and the style of antennae a trifle 

 shorter. The dorsum of thorax has the markings similar, but is more 

 convex and compressed, and the median stripe from the very front thickly 

 clothed with long, erect hair, giving the thorax a peculiar mane- like 

 appearance, as in some species of Asilinae. The abdomen has ap- 

 parently posterior cross-bands of gray pollen. The convexity of 

 the face does not reach quite to the base of the antennae, and it may be 

 the species would be better placed under Danlopogon. 

 One specimen, Como, Wyoming. 



2.3. ? CJyrtopogoii gibber n. sp. (Plate I, fig. 9.) 



f ? Holopogon f appendicidatuni Bigot, Annales Soc. Ent. Fr., 187cS, 438. 

 9 . — Dorsum of thorax strongly convex ; front much excavated, facial gibbosity 

 slight, hind tibiae and tarsi thickened. — Black; abdomen with narrow interrupted 

 anterior cross-bands and small lateral spots, wings hyaline, cross-vein and costal 

 cell at tip narrowly clouded with dark brown : anterior branch of the third vein 

 angulated. Length 7 mm. 



Face in. profile only a little convex below, gray pollinose and with whitish bris- 

 tles on the oval margin of the same color, but more pile-like above. Antennae 

 black, the first two joints of nearly equal length, the third joint not twice as long 

 as the first two together, not very slender, style acute, about half as long as the 

 third joint, the tip with a bristle. Front much excavated on the sides of the 

 ocellar tubercle which has a few black bristles, pile f)f the occiput below white. 



