Stegomyia Theobald, 1901

Stegomyia is characterized and distinguished from other genera of subfamily Culicinae by the following combinations of characters. Characters that diagnose the type species in the phylogenetic study of Reinert et al. (2009) are indicated with an asterisk (*). ADULTS ‒ Ornate mosquitoes, usually dark with white or silver markings; vertex of head with broad decumbent scales, erect scales restricted to occiput, usually few in number; clypeus bare or with scales; *lateral surface of antennal pedicel with scales; proboscis usually about as long as forefemur; maxillary palpus with white scales; maxillary palpus of females about 0.15–0.30 length of proboscis, comprised of 3 or 4 palpomeres, palpomere 4 minute when present; maxillary palpus of males longer than 0.5 length of proboscis, comprised of 5 palpomeres, palpomeres 4 and 5 subequal, slender, *up-turned, with few setae, their combined length at least 0.4 combined length of proximal palpomeres; scutum entirely or mainly covered with narrow scales; acrostichal setae absent; scutellum usually with broad decumbent scales; paratergite usually with scales; mesopostnotum bare; antepronotum usually with broad decumbent scales; *lower proepisternal scales present; prespiracular setae absent; postspiracular setae present; lower mesepimeral setae usually absent; postprocoxal membrane without scales; wing with narrow plume scales, *some pale scales near base of costa; hindtarsus with basal white band on one or more tarsomeres; ungues of fore- and midlegs toothed or simple, those of hindleg usually simple, anterior fore- and midungues of males larger than posterior ungues; laterotergite of abdominal segment I with scales. FEMALE GENITALIA ‒ Segment VIII retractile, somewhat compressed, sternum VIII with prominent rounded lateral lobes; segment IX with wide and deep posterior emargination, shorter than cercus; cercus broad and rather short, with scales; postgenital lobe with shallow caudal emargination; insula tongue-like, longer than broad, with minute setae and 2–10 larger setae on apical 0.25–0.50; 3 spermathecae, one larger than the other 2. MALE GENITALIA ‒ *Sternum IX bare; gonocoxite sometimes with membranous mesal area, gonostylus usually simple, gonostylar claw present, inserted apically or subapically, *developed as relatively narrow spiniform, *truncate, rarely slightly rounded; claspette well developed, with numerous setae; aedeagus strongly toothed; aedeagus comprised of distinct lateral plates, each with numerous teeth; paraproct without teeth; cercal setae absent. LARVAE ‒ Antenna without spicules; setae 4–6-C far forward, inserted cephalad of antennal base; seta 4-C well developed, branched; setae 5,6-C seldom strongly branched; seta 4-C closer to seta 6-C than to seta 5-C, cephalad and mesad of seta 6-C; seta 6-C cephalad of setae 5-C and 7-C; seta 6-M branched; *seta 7-C inserted at approximately same level as seta 5-C; *seta 4-P branched; *seta 5-P longer that seta 6-P; seta 12-I not developed; seta 2-VIII distant from seta 1-VIII; comb scales usually in single row; saddle complete or incomplete; *seta 2-X single or double, rarely triple; ventral brush (seta 4-X) with 4 or 5 pairs of setae on grid or boss, without precratal tufts. PUPAE ‒ Generic characters not evident; seta 8-C well posterior to trumpet, at least halfway between trumpet and mesonotum. See Aedini.