Sierracapnia hornigi (Baumann and Sheldon 1984)

(Figs. 5-8)

Sierracapnia hornigi (Baumann and Sheldon 1984):30 .

Holotype ♂ (USNM). Type locality: Nevada, Esmeralda Co., Middle Creek, White Mountains .

Material Examined. USA, California: Inyo Co., Cottonwood Creek, White Mountains, 5700’, 30- XII-1985, D. Giuliani, 1♂ (BYUC) . Mono Co., Millner Creek, White Mountains, 6800’, 21-II-1985, D. Giuliani, 4♂, 11♀ (BYUC); Willow Creek, 10 mi S 6 mi E Benton, 7000’, White Mountains, 5-III- 1986, D. Giuliani, 1 ♀ (BYUC) . Nevada: Esmeralda Co., Chiatovich Creek, White Mountains, 11-II- 1986, R.W. Baumann & B.J. Sargent, 1♂ (BYUC); Leidy Creek, White Mountains, 7400’, 18-III-1999, A.L. Sheldon, 1♂, 10♀ (BYUC); Middle Creek, White Mountains, 10-II-1977, A.L. Sheldon, 12♂, 41♀ (BYUC); Middle Creek, White Mountains, 4- III-1979, C.E. Hornig, 14♂, 17♀ (BYUC); Middle Creek, mouth of canyon, 11-II-1986, R.W. Baumann & B.J. Sargent, 7♂, 11♀ (BYUC) .

Male. Tergum 7 knob narrow and slightly notched, knob width 11-16% of segment 7 width (Fig. 8). Epiproct in dorsal view increases in width between neck and anterior half; maximum width 17-24% of epiproct length; maximum width occurs anterior of mid epiproct; apex rounded and with median posterior-projecting triangular lobe; dorsal membrane light colored (Figs. 5, 7). Epiproct in lateral view slightly convex dorsally, deeply keeled ventrally; maximum depth 19-24% of length; maximum depth occurs anterior of mid epiproct; neck narrow (Fig. 6). Epiproct dorsolateral horns closely appressed to main dorsal surface; horn length 15-18% epiproct length; horn tips extend forward to 76-85% epiproct length (Fig. 7, Table 1).

Female. Subgenital plate heavily sclerotized and dark; plate covers full width of sternum 8 from posterior to anterior edge; posterior of sternum 7 sclerotized (Fig. 224, Nelson and Baumann 1989).

Distribution. Sierracapnia hornigi occurs in the White Mountains of Mono Co., California, and Esmeralda Co., Nevada (Fig. 39).