Subgenus Kerteszia Theobald, 1905

Subgenus Kerteszia is most closely related to subgenus Nyssorhynchus. The two subgenera are very similar in overall morphology, but the following features easily distinguish the adults, larvae and pupae of Kerteszia. The scutum of adults has four distinct longitudinal lines of dark pollinose integument and a few scales in patches on the lateral and/or anterior areas. The scutellum is normally void of scales (a few rarely occur medially) and the mid- and hindfemora have a stripe of white scales on the distal third of their anterior surfaces. The wings are distinct in having crossveins sc-r and r₁-r_s relatively far apart (distance about half the length of the sector dark spot on the costa and radius-one), a spot of dark scales where the humeral crossvein intersects the radius, the subcosta ending before the subcostal pale spot, vein R4+5 dark-scaled apically, vein CuA mostly dark-scaled with a basal dark spot and the anal vein normally entirely dark-scaled (rarely wit one or two small pale spots). The gonocoxite, claspette and aedeagus of the male genitalia exhibit a number of differential and diagnostic features. The gonocoxite lacks a subapical seta, two subequal accessory setae are inserted beyond mid-length, the internal seta is very stout and inserted far basad of the accessory setae, and the parabasal seta is considerably longer than the internal seta. The ventral lobes of the claspette are narrowly joined separate structures, the dorsal lobes each bear two distinct groups of specialised setae, and the aedeagus is slender and uniformly tapered to a narrowly rounded apex. Larvae exhibit many distinctive features, which include, but are not limited to, seta 1-A single and inserted dorsolaterally, seta 2-C inserted on same level or slightly posterior to seta 3-C, seta 4-C inserted posterolateral to seta 3-C, hypostomal suture undeveloped or very short, absence of a sclerotised tubercle at the base of seta 4-C, long seta 4-M (about as long as seta 6-M), weakly plumose setae 8-M,T and 6,7-I,II, single seta 2 on segments I-IV, absence of seta 14-III, seta 2-IV inserted lateral to seta 4-IV, weakly developed seta 1-S (single, with 2 or 3 branches or weak terminal branches or aciculae) and nine pairs of seta 4-X. Salient features of Kerteszia pupae include a trumpet with a short pinna (less than half as long as the trumpet) and no meatal cleft, seta 9-I shorter than a third the length of seta 6-I, weakly developed setae 1-I-VII and 5-V-VII (less than half as long as the segment), seta 14-III absent, seta 2-IV,V inserted anterior and nearly in line with seta 3, seta 3-VI inserted lateral to seta 1-VI, seta 10-VI present and seta 1-Pa stout and shorter than seta 2-Pa (absent in An. neivai).  See genus Anopheles.