. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 52 examination of the saddle shows characteristic arcuate or broken beam-like thickenings 25-50 fx or more in length, arranged in ir- regular rows parallel to the longitudinal axis of the anal segment. Similar thickenings are seen in the central one-third length of the saddle in the fourth ins tar larvae of C. morsitans (Fig. 29A) or along the extreme ventral surface in the fourth ins tar larvae of C. silvestris (Fig. 29B).Later, very tiny denticles (1-5 ?) are seen initially in the distal re
. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 52 examination of the saddle shows characteristic arcuate or broken beam-like thickenings 25-50 fx or more in length, arranged in ir- regular rows parallel to the longitudinal axis of the anal segment. Similar thickenings are seen in the central one-third length of the saddle in the fourth ins tar larvae of C. morsitans (Fig. 29A) or along the extreme ventral surface in the fourth ins tar larvae of C. silvestris (Fig. 29B).Later, very tiny denticles (1-5 ?) are seen initially in the distal region on these thickenings and these gradually diminish in number, but elongate to 25-30 ? in C. morsitans and up to 10-12 /u in C. silvestris (Fig. 29).. J-^ A . ? ? Fig. 29. Microscopic structure of saddle in Culiseta morsitans (A) and C. silvestris amurensis (B). a—types of denticles and b—arrangement of denti- cles (according to types) on saddle surface, (anterior-posterior regions). On the saddle of the first instar larva of Allotheobaldia longi- areolata, in its posterior half, we find minute, sparsely arranged, paired denticles scattered without a definite arrangement, set on beam-like thickenings of the cuticle and slightly denser along the dorsal margin (Fig. 30). In the second instar larva, the spine forma- tion begins even in the mid-posterior region, that is, in the posterior one-third of the saddle where minute denticles are seen initially; later triple and paired denticles also arise; finally, the anterodorsal region of the dorsal plate is covered almost exclusively by single, short (6-10 /i) or long (15-20 /?) setae (Fig. 30). The saddle of the third and fourth instar larvae of A. longiareolata almost all along its length has a smooth cuticle and only its anterodorsal margin is covered with fairly numerous, long (up to 150-180 ? in L )* and *L4 = fourth instar larva [Editor].. Please note that these images are extracted from scanned page images that may have b
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Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectmosquitoes
