Subfamily Culicinae, genus Culex. Subgenus Lasiosiphon is monobasic. See Culex classification, Subgenus Lasiosiphon). Subgenus abbreviation – Las.
ADULTS – Small yellow-brown mosquitoes without special ornamentation; scales of vertex, antepronotum and scutellum all narrow; maxillary palpus of females short, less than 0.25 length of proboscis, maxillary palpus of males shorter than proboscis, slender, without setae; proboscis slightly longer than forefemur; lower mesepimeral seta present; wing with linear scales, vein R2+3 shorter than cell R2 in females, about same length in males; hindtarsomere 1 somewhat shorter than tibia; ungues of females simple, fore- and midungues of males each with a tooth, hindungues simple; pulvilli rudimentary; abdominal terga with narrow inconspicuous apical pale bands or apical lateral pale spots only. MALE GENITALIA – Gonocoxite without scales; subapical lobe prominent, setae not highly modified, without foliform seta; gonostylus simple; paraprocts with exceptionally long basal arm, spicules of crown numerous but short and weak; phallosome consists of 2 pairs of slender rods (distinction from all other Culicini). LARVAE – Antenna noticeably longer than head capsule; setae 5,6-C minute (distinction from all other Culicini); integument of thorax and abdomen densely covered with minute spicules; siphon moderately long with about 16 long seta 1-S in single slightly zigzag posterior row extending from near base to near apex and 2 very small setae inserted on distal half on either side of posterior row; saddle narrowly incomplete ventrally; ventral brush (seta 4-X) strongly developed, with one precratal seta. PUPAE – Seta 7-I,II very long, seta 7-I longer than seta 6-I; seta 2-II inserted far mesad of seta 1-II; seta 5-IV–VI longer than following tergum; seta 1-IX absent; paddle very large, ovoid; seta 2-Pa absent. See genus Culex.
The affinities of Lasiosiphon are uncertain, but it appears to be more closely related to subgenera Afroculex and Maillotia than to other taxa in the Palaearctic and Afrotropical Regions. Members of these subgenera were placed in the same clade in the equally weighted and Bayesian analyses of St John (2007) and the parsimony analyses of Harbach et al. (2012) based on morphological data.
Larvae are found in clear freshwater pools with rocky bottom. Nothing is known about the bionomics of the adults, but females are unlikely to feed on humans.
The single species of subgenus Lasiosiphon is of no medical importance to humans.
Desert areas of northern Africa and southwestern Asia.
adairi Kirkpatrick, 1926