Culicoides Latreille and Leptoconops Skuse biting midges of the southwestern United States with emphasis on the Canyonlands of southeastern Utah (Diptera: Ceratopogonidae) Author Phillips, Robert A. 2962 Desert Road Moab, UT 84532 USA text Insecta Mundi 2022 2022-01-28 2022 907 1 214 journal article 10.5281/zenodo.6391684 1942-1354 6391684 CBD29188-143B-44DF-BE21-1654D50D8621 Culicoides oregonensis Wirth and Rowley Culicoides oregonensis Wirth and Rowley, 1971: 162 (numerical characters; key; female, male; fig. female antenna, palpus, eye separation, spermathecae, male genitalia, parameres; Oregon ). Wirth et al. 1985: 26 (numerical characters; fig. female wing). Diagnosis. ( Tables 14 , 15 ) Wing pattern reduced; r 2 dark; pale spots only at tip of costa, on r-m crossvein; scutellum about same brown as scutum; spermathecae ovoid, subequal, without sclerotized necks (as in Fig. 277 C . palmerae ); ventral apodeme of gonocoxite simple; gonostylus not abruptly bent to an L-shape, entire lateral contour convex; aedeagus broadly Y-shaped, median process narrow, nearly parallel-sided, <0.1 as wide as basal arm spread, ~5× longer than median width; parameres separate, with hooklike bend at ~0.8 and sharp tip. Distribution. Oregon , Northern California . Adult behavior. The mandibular and lacinial teeth on the female indicate it feeds on vertebrate blood; however, its hosts are unknown. Remarks. No C. oregonensis were examined.