Rachionotomyia Theobald, 1905

ADULTS ‒ Unornamented mosquitoes; vertex of head with broad dark decumbent scales, sometimes with subdued bronzy reflections; ocular scales white or whitish, sometimes with subdued blue reflections (species of the Affinis Subgroup with brilliant blue reflections); 2‒4 ocular setae (usually 3) on either side (often 4 in species of the Nepenthis Subgroup); maxillary palpus of both sexes at most 0.17 (one-sixth) length of proboscis (0.33 in Tp. edwardsi); scutum with broad scales except in midline; dorsocentral setae absent; prescutellar setae present or absent; postpronotal setae absent (present in Tp. edwardsi); scales of thoracic pleura white or whitish (with silvery reflections in species of the Affinis Subgroup); subspiracular scales present; wing veins mostly with narrow scales, broader distally on veins R2 and R3; femora pale ventrally, anterior surface entirely dark-scaled or narrowly pale ventrally at base, tibiae and some tarsomeres often paler ventrally; hindungues paired; pale scaling of abdominal terga white or whitish (with silvery reflections in species of the Affinis Subgroup). FEMALE GENITALIA – Postgenital lobe with or without shallow apical emargination; insula with single row of 8 or fewer marginal setae on either side (double row and more numerous in species of the Affinis Subgroup), with 2‒7 basolateral setae on each side; 3 spermathecal capsules. MALE GENITALIA – Small, inconspicuous, retracted, not normally fully exposed; ninth tergal lobes with stout relatively short setae (long and slender in Tp. rozeboomi); gonostylus rather stout, slightly if at all tapered toward apex (more slender in Tp. dofleini; highly modified in Tp. rozeboomi); lateral plate of aedeagus with spiculate sternal lobe. LARVAE – Maxilla with short apical tooth and typical maxillary brush; hypostomal suture conspicuous, complete to posterior tentorial pit; seta 15-C inserted far posterior near collar; setae 6-M and 7-T single, short, stout and rigid; seta 8-M,T strongly developed (except in Tp. dofleini); seta 14-I‒VI usually strongly developed (minute or absent in Tp. dofleini and species of the Nepenthis Subgroup); siphon with or without lateral seta, similar to seta 2a-S when present. PUPAE – Seta 1-CT very long, double (single in Tp. nepenthis); seta 1-I strongly developed, multi-branched, seta 1-III‒VI usually slender and delicate, sometimes multi-branched and conspicuous; seta 3-II,III strongly developed, much longer than seta 5-III, seta 3-VII much shorter than segment VIII (except in species of the Affinis Subgroup); seta 5-IV long, stout, conspicuous, much longer than seta 1-IV; seta 6-III‒V short and delicate; punctures present on terga III‒V or IV and V; seta 9-VII,VIII long, multi-branched; paddle with apex at most bluntly pointed. See genus Tripteroides.