Culicoides hawsi Wirth and Rowley

(Fig. 91, 145, 224, 276)

Culicoides hawsi Wirth and Rowley, 1971: 159 (numerical characters; key; female, male; fig. female antenna, palpus, eye separation, spermathecae, male genitalia, parameres; Washington, Utah: Cache, Uintah counties). Wirth et al. 1985: 26 (numerical characters; fig. female wing).

Diagnosis. (Tables 14, 15) Wing pattern reduced; r 2 dark; distal pale spots faint or absent from r 3, m 1, m 2; scutellum about same brown as scutum; faint pale band apical on fore femora; fore and hind tarsomeres with apical spines; spermathecae unequal by ≥1.3; elongate, sometimes faint; sclerotized ring on spermathecal duct; ventral apodeme of gonocoxite simple; gonostylus about evenly curved, not abruptly bent, entire lateral contour convex; aedeagus V-shaped, median process tapering to tip ~0.4 as wide as basal arm spread; parameres separate, apices abruptly bent ventro-laterally with simple sharp tip.

Distribution. Washington, Oregon, California, Utah (Cache, Grand, Uintah counties).

Adult behavior. The mandibular and lacinial teeth on the female and collection in CO 2 -baited traps indicate it feeds on vertebrate blood; however, its hosts are unknown.