Wyeomyia Theobald, 1901

Subgenus Wyeomyia is difficult to characterise because most species are poorly known and probably do not comprise a monophyletic group (see below); consequently, some of the characteristics listed here are unlikely to be shared by all species currently included in the subgenus. ADULTS ‒ Proboscis short, shorter than forefemur, slightly enlarged distally; mesopostnotal setae present; paratergite with or without scales; lower mesokatepisternal setae not extending above dorsal margin of mesomeron; upper calypter of wing without marginal setae. MALE GENITALIA ‒ Tergum IX lobes weakly developed, each bearing 2 or more unmodified setae; gonocoxite elongate, lateral and ventral surfaces with numerous scales, basal mesal lobe and tergal triad present; gonostylus with distinct stem and large head comprised of variously developed lobes, large median lobe M always present, lobe A indistinct to well developed, lobe E present, absent or not differentiated from lobes A or M, lobes B and C present or absent; aedeagus longer than wide, apical tergal arms not separate, not forming an apical tergal bridge; proctiger normal, paraproct with ill-defined apical teeth, cercal setae present, sometimes numerous and longer than usual. LARVAE ‒ Setae 4‒6-C single or branched, 5-C inserted posterior, more or less on level or anterior to seta 7-C; seta 1-A single or branched, inserted on distal 0.25 of antenna, sometimes very near apex; maxilla nearly as broad as long, without prominent apical tooth, seta 3-Mx not borne in lateral cup-like notch, seta 4-Mx single, simple, hypostomal sclerite fused (partially?) with maxillary body; seta 14-C moderately well developed, single or with relatively few branches, generally 2‒4 times as long as seta 15-C (14-C very long with numerous branches in Wy. nigritubus), inserted more or less on level with or slightly anterior to seta 15-C at approximately mid-length of labiogula; seta 1-P usually multi-branched, inserted mesad to posteromesad of setae 2,3-C approximately midway between these setae and midline of thorax; seta 4-P multi-branched, shorter to longer than seta 3-C; seta 4-T relatively large, multi-branched (except in Wy. nigritubus); seta 11-P,M,T branched (single in Wy. nigritubus), branches flexible; seta 13-T multi-branched, long, about 0.75 to full length of thorax; insertions, positional relationships and development of setae 1,2,13-I‒VII varied, seta 1 generally inserted more posterolaterad than usual, seta 2 generally inserted far anterior to anteromesad of seta 1; seta 9-I‒VI with 2 or more branches; seta 13-I inserted far anterior to other ventral setae but seta 9-I sometimes inserted more or less at same level, 13-II‒VI inserted posterior to other setae (except in Wy. nigritubus); comb plate absent, comb a single long row of close-set spine-like scales; siphon without pecten, seta 1-S inserted on proximal 0.25 of siphon, setae la,2a-S each a more or less straight row of many to numerous elements (few elements in Wy. nigritubus); saddle with or without posterolateral spicules; seta 4-X multi-branched, usually about 0.5 length of seta 1-X (shorter in Wy. nigritubus). PUPAE ‒ Cephalothorax and abdomen, especially anterior terga, with pattern of pigmentation (except Wy. nigritubus); trumpet short, laterally expanded; seta 1-I strongly developed, dendritic; seta 2-II‒VII inserted anterior, anteromesal or mesal to seta 1; seta 3-V,VI inserted anterior to anteromesad of seta 1 (anterolateral in Wy. nigritubus); seta 6-II single, as long as to slightly longer than tergum III, 6-VII inserted on tergum posteromesal to seta 9-VII (inserted on sternum in Wy. corona); paddle variable, longer than wide, length usually >1.5x width, usually distinctly longer than tergum VIII, outer part distinctly wider than inner part, narrowed apically, apex and at least distal margins minutely spiculate (margins fringed with long spicules in Wy. mitchellii). See genus Wyeomyia.