. Bulletin of the United States Geological and Geographical Survey of the Territories. Geology. ^Blepharoptera defessa,n. sp., d" ?.—A sparse pubescence on the under side of the pleurae, a single vibrissa on each side of the epistoma, a single strong bristle above the middle tibi£e; costa beset with moderately long bristles; length 5-6'^^™. Antennte red, third joint brownish red ; arista rather long; front yellowish-red; frontal orbits grayish; a paler triangle on the vertex, bearing the brownish ocellar tubercle ; anterior frontal bristle short, the one behind not quite twice as
. Bulletin of the United States Geological and Geographical Survey of the Territories. Geology. ^Blepharoptera defessa,n. sp., d" ?.—A sparse pubescence on the under side of the pleurae, a single vibrissa on each side of the epistoma, a single strong bristle above the middle tibi£e; costa beset with moderately long bristles; length 5-6'^^™. Antennte red, third joint brownish red ; arista rather long; front yellowish-red; frontal orbits grayish; a paler triangle on the vertex, bearing the brownish ocellar tubercle ; anterior frontal bristle short, the one behind not quite twice as long. Thoracic dorsum yellowish-gray ; the eight large dorsal bristles are inserted on brown spots, which are sometimes confluent; the finer pubes- cence on very minute dark spots, an often faint brown stripe in the middle, and a still less distinct one on each side ; hume- ral callosities reddish, the flat scutellum likewise. Pleurte pale brownish-gray, darker below. Abdomen grayish-polli- nose, the ground color being blackish; male hypopygium yellow, with delicate black pile; tip of the female abdomen also yellowish; hind margins of segments pale. Halteres whitish. Wings with a brownish-yellow tinge ; bristles on the costa of moderate length; posterior cross- vein rather near the tip of the fifth vein, YiG. defessa, Ostein, SACKED, i^.sp. ^^^ j^g^. ^^^^^^^ ^^ ^^^^ ^^i^ ^^^^^ 1^^^ than half of the cross-vein. Legs reddish-brown or brown; knees and base of middle iemora paler. Habitat.—Hundred Dome Cave, near Glasgow, Ky. (F. G. Sanborn, Geological Survey of Kentucky, N. S. Shaler in charge); a male and two females. The specimens having been kept in alcohol were very much injured. The species is related to B. cineraria Lw. (syn. armipes Lw.), but is easily distinguished by the absence of the peculiar armature on the hind femora of the male, the much darker legs, larger size, &c. The anterior frontal bristles of jB. cineraria are much shorter, but the
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectgeology, bookyear1874
