. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 94. pv . Fig. 52. Structure of stigmatic plate (surface view) (after Monchadskii, 1930). pv, Iv and av—posterior, lateral and anterior valves; /—lever; al and pi— anterior and posterior arms of lever; psp—posterior process; stp—stigmatic process; n—lever arm (?, ? and J) and 1-5—numbers of setae. 75 (subgenus Culicella), the anal segment is longer and the ratio of its length to diameter is about The integument of the anal segment has a heavily sclerotized section—saddle—which in all larv
. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 94. pv . Fig. 52. Structure of stigmatic plate (surface view) (after Monchadskii, 1930). pv, Iv and av—posterior, lateral and anterior valves; /—lever; al and pi— anterior and posterior arms of lever; psp—posterior process; stp—stigmatic process; n—lever arm (?, ? and J) and 1-5—numbers of setae. 75 (subgenus Culicella), the anal segment is longer and the ratio of its length to diameter is about The integument of the anal segment has a heavily sclerotized section—saddle—which in all larvae of younger stages (lst-3rd) covers only the dorsal portion of the anal segment in the form of a ring. The 4th-instar larvae of A. longiareo- lata with only the dorsal peak are an exception (Fig. 98, d).. There is a weak seta on the surface of the saddle in the median line or close to its posterior margin. Apart from this seta, there are two pairs of caudal setae posterior to the saddle on the dorsal surface of the anal segment (Fig. 48). Of these, the outer ones are much longer, thicker and less branched than the inner ones, often seen as an intensely developed flabellum consisting of 15-20 or more branches. Both the outer and inner caudal setae are simple only in Theomyia fraseri (Fig. 97, b). The ventral portion of the anal segment has one of the most important organs of movement, the ventral brush (Fig. 48, m and n2). This is absent only in the first instar larva (Fig. 49). The ventral brush consists of a group of flexed and specially branched setae of different lengths. The branching of each seta in Culisetina larvae occurs in the same plane, longitudinally, on both sides of a short main shaft (Fig. 31). Together the ventral brush forms an asymme- trical flabellum set perpendicular to the frontal body plane and set downwards and posteriorly (Fig. 48). Furthermore, the setae are not. Please note that these images are extracted from scanned page images th
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