. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 74 mediary form. In no instance is the ventral surface flat. From the outer margin, the maxillary body gradually rises in the form of a Shuster's lean-to up to the center or further toward the inner margin and is interrupted immediately thereafter forming a fairly distinct median rib (Fig. 41). The surface of the maxillary lobe adjoining the inner margin is thus noticeably below its outer surface. The median rib in some cases extends almost longitudinally while in other cases, it is curved to
. Blood-sucking mosquitoes of the subtribe Culisetina (Diptera, Culicidae) in world fauna. Mosquitoes. 74 mediary form. In no instance is the ventral surface flat. From the outer margin, the maxillary body gradually rises in the form of a Shuster's lean-to up to the center or further toward the inner margin and is interrupted immediately thereafter forming a fairly distinct median rib (Fig. 41). The surface of the maxillary lobe adjoining the inner margin is thus noticeably below its outer surface. The median rib in some cases extends almost longitudinally while in other cases, it is curved toward the outer margin or shows other features. In Allotheobaldia longiareolata larvae, the ventral wall of the maxil- lary lobe forms a typical upturned flap (Fig. 42, 0). The characteristics of the form of the maxillary lobe are expressed as a maxillary index, that is, the ratio of its length to width. In typical periphytophages, the value of this index is about one or even less, that is, the maxillary lobe is quadratic in form or slightly broad-. 59 Fig. 41. Structure of maxillae of larvae with universal type of feeding. atg—articular maxillary tooth of gena; ge—gena; gus—gular suture; Imx— lobe (body) of maxilla with filaments; mxp—maxillary palp; prmt— prementum (asterisk points to the articulation of prementum with gular suture); st—stipes; 1—apical tuft of filaments; 2—marginal crest; 3— digitate appendages; 4—ventral crest; 5—labial articular process; 6— ventral median rib; 7—terminal sensory appendage of 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 Science Foundation
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