Subgenus Carrollia Lutz, 1905

ADULTS – Dark scales of head, proboscis, maxillary palpus, legs and abdomen almost always with metallic iridescence; vertex of head with transverse band of broad decumbent scales anteriorly, narrow decumbent scales posteriorly on vertex and on occiput or absent, orbital line without scales; proboscis about as long or longer than forefemur; maxillary palpus of females scarcely 0.25 length of proboscis, with 3 palpomeres, palpomere 4 vestigial or absent; palpus of males about as long as proboscis, slender, bare, with 5 palpomeres; acrostichal setae usually absent; dorsocentral setae present or absent; lower mesepimeral seta present; wing entirely dark-scaled; femora with patches of metallic scales; tarsi all dark-scaled or hindtarsomere 4 with broad basal pale ring; ungues of females simple, subequal on fore- and midlegs; fore- and midungues of males enlarged and uneven, larger unguis of foreleg always and that of midleg sometimes with a tooth, both with very small pulvillus, smaller unguis of fore- and midlegs simple and without pulvillus; hindungues small, simple and equal as in females but with very short pulvillus; abdomen laterally compressed, especially in males, terga with basolateral spots of pale iridescent scales; tergum VIII of males very deeply emarginate in middle, almost divided; tarsi either dark-scaled or with a pale ring at base of hindtarsomere 4. MALE GENITALIA – Ninth tergal lobes approximated or widely separated, small, simple, conical or flattened and rounded, with setae largely directly laterad; gonocoxite with or without scales; subapical lobe subapical in position, proximal division always present, bearing 2 flattened apical setae and sometimes 1 subapical or apical relatively simple seta, additional setae sometimes present on stem and base, distal division poorly developed or absent, usually with 1 lanceolate seta when present, an accessory division frequently developed near base of proximal division as a simple long digitiform process, a complex lobe with broad dorsal expansion or 2 separate columnar processes; gonostylus usually enlarged, variously shaped; phallosome not columnar, much as in species of Melanoconion, lateral plate with basal hook; paraproct with crown comprised of a single row of blunt flattened spicules; cercal sclerite usually membranous, setae present or absent. LARVAE – Antenna with small seta 1-A inserted in middle third; median labral plate poorly differentiated; palatal brush normal; seta 2-C strongly developed, mesal of seta 1-C; seta 3-C nearly always absent, rarely represented by a spicule; seta 3-P shorter than setae 1,2-P, usually branched; seta 1-VII very strongly developed, extending beyond base of siphon; seta 7-II normally similar to seta 7-III–VI; comb scales apically fringed and in a patch or spine-like and in a single row; siphon moderately long, pecten restricted to proximal 0.5, spines with or without denticles or marginal fringe; seta 1-S in irregular double posterior row of 8–16 elements and 2 accessory elements, 1 lateral and 1 posterolateral; occasionally a third posterolateral element present; saddle short, complete; seta 1-X single or branched; seta 2-X always strong, branched; seta 3-X always strong, single; ventral brush (seta 4-X) with 4–6 pairs of setae on poorly developed grid without lateral bars. PUPAE – Meatus of trumpet without slit from proximal part of pinna; seta 2-II mesad or laterad of seta 3; seta 2-III,VI,VII mesad of seta 1; seta 9-VII distinctly larger than seta 3-VII; dorsal lobe of tergum VIII not overlying lateral part of tergum IX; seta 1-IX not developed; seta 1-Pa present, rarely absent, seta 2-Pa absent. See genus Culex.