Miamyia  

ADULTS ‒ Proboscis short, expanded distally; mesopostnotal setae present, scales absent; paratergite with or without scales; lower mesokatepisternal setae not extended above dorsal margin of mesomeron; upper calypter of wing without marginal setae. MALE GENITALIA ‒ Tergum VIII strongly produced posterolaterally; tergum IX lobes usually not developed (small in Wy. oblita), with nearly continuous row of setae; gonocoxite with tergal triad (2 setae in Wy. sabethea); gonostylus with slender to stout stem, lobes M, AE and C developed; aedeagus longer than wide, apical tergal arms not fused (not forming apical tergal bridge); proctiger expanded near mid-length, with line of filamentous spicules extending and becoming longer from near apex to expansion, sometimes coalesced at expansion to form a unique process, cercal setae present. LARVAE ‒ Setae 4‒6-C single, widely separated, 5-C inserted posterior to seta 7-C, 6-C inserted anterior to seta 7-C; seta 1-A single, inserted near apex of antenna; maxilla longer than broad, with small apical tooth, seta 3-Mx of maxilla not borne in lateral cup-like notch, seta 4-Mx single, apically forked, hypostomal sclerite fused to maxillary body, seta 6-Mx branched, often stellate; seta 14-C inserted anterior to seta 15-C; thorax and abdomen with numerous conspicuous stellate setae on dorsal and ventral surfaces; seta 11-P,M,T single, hair-like; comb plate usually present, comb with single row of large spine-like scales and often variable number of much smaller scales anterior to their bases; siphon without pecten, seta 1-S single or branched, inserted within or beyond basal third of siphon, setae la,2a-S single, each in more or less straight row, 1a-S with 1‒4 and 2a-S with 2‒4 setae; saddle usually with conspicuous spicules on posterior margin; seta 4-X branched, length variable, usually much shorter than setae 1‒3-X. PUPAE ‒ Cephalothorax and abdomen without spots; trumpet short, laterally expanded above base; seta 1-I well developed, dendritic; seta 2-II‒VII inserted anterior to level of seta 1, 2-II inserted more or less midway between setae 1,3-II; seta 3-II,III inserted more or less directly lateral to seta 1; seta 6-II single, about as long as tergum III, seta 6-VII inserted on sternum ventrad of seta 9-VII; paddle short, not longer than tergum VIII, more or less flask- or pear-shaped, apex more or less truncate and fringed with relatively long spicules. See genus Wyeomyia.