. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 48. Fig. 27. Types of Culisetina eggs. 1—Moderately long, symmetrically ellipsoidal; 2—Moderately long, sym- metrical tapering; 3—Long and asymmetrical; 4—Moderately long and asymmetrical; 5—Short and symmetrical with stem; 6—Asymmetrical. The author's investigations of ovipositions in Far Eastern C. bergrothi and Central Asian C. alaskaensis indica, C. annulata sub- ochrea and A llotheobaldia longiareolata show a wide range of varia- tion in the pigmentation of developing eggs and in the val
. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 48. Fig. 27. Types of Culisetina eggs. 1—Moderately long, symmetrically ellipsoidal; 2—Moderately long, sym- metrical tapering; 3—Long and asymmetrical; 4—Moderately long and asymmetrical; 5—Short and symmetrical with stem; 6—Asymmetrical. The author's investigations of ovipositions in Far Eastern C. bergrothi and Central Asian C. alaskaensis indica, C. annulata sub- ochrea and A llotheobaldia longiareolata show a wide range of varia- tion in the pigmentation of developing eggs and in the values of the egg index. It has been noticed that the eggs at different sites in an egg raft (along the fringes and in the middle) may have extremely varying indices: for example, in C. bergrothi the values vary from to Pigmentation varies in the eggs according to the stages of larval development. Not all of these egg characteristics are presently useful as taxonomic features. Larva Body dimensions and color. The fourth instar larvae of Culise- tina mosquitoes attain a length of 15 mm or more. As in many other insects, the larval growth of mosquitoes does not proceed evenly. The heavily sclerotized body portions increase in dimensions only during molting, as long as the integument has not hardened. The dimensions of other body portions with soft integument initially increase (after molting) due to the lengthening of the cuticle within a period of ? to 16 hours. Later, growth ceases for some time and proper growth, typified by an even increase in dimensions, begins on the second day after molting and extends throughout the entire stage until the next molting. This property precludes the use of body length as a determining feature for dimensions, since the larvae of the fourth instar, a day after molting, differ sharply from the larvae of the same fourth stage surviving for 3 or 4 days. Moreover, as in. Please note that these images are extracted from scanned pa
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