. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 28. Fig. 19. Wing base of Culiseta. X—Remigium. Remaining labels are the same as in Fig. 18. British authors) in the form of a pointed process. The radial setae are 28 absent in the other members of the family Culicidae, except Culiset- ina, and thus represents one of the vital systematic features of the subtribe Culisetina*. The number of setae on the lower surface of the remigium** is often several dozen; their growth on the upper surface of the wing is poor. The thickened base of the anal
. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 28. Fig. 19. Wing base of Culiseta. X—Remigium. Remaining labels are the same as in Fig. 18. British authors) in the form of a pointed process. The radial setae are 28 absent in the other members of the family Culicidae, except Culiset- ina, and thus represents one of the vital systematic features of the subtribe Culisetina*. The number of setae on the lower surface of the remigium** is often several dozen; their growth on the upper surface of the wing is poor. The thickened base of the anal vein covers the base of the cubitus vein and serves as the second large arm of the base. Along its poste- rior margin the wide pterygium has a row of narrow, lanceolate scales. The wing alulae (squamae) have long setae. The thoracic setae are absent in Culisetina as in other mosquitoes of the family Culicidae. Without repeating the overall wing dimensions and forms dis- cussed elsewhere, some details of venation and its variability in the different species and groups of Culisetina are discussed below. The subcostal vein extends from the wing base parallel to the costal vein and joins it roughly at the boundary of the second vein and the last one-third of the wing length. The ratio of the length of the subcostal vein, measured from the humeral plate to the junction with the costal, to the length of the wing surface expressed as a percentage is called the subcostal index or the index of the subcostal vein. *The African Theomyia fraseri, in which the remigium is absent, is an exception. ??Considered as the lower surface of the subcostal vein by most later authors [Editor].. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Maslov, A. V; Ward, Ronald A. Washington : Smithsonian Institution Libraries : National S
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