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American Midland Naturalist Monograph No. 3 



spines usually present on inner margin of the large projection and between the 

 large projection and non-expanded basal portion of the filament. Basistyle (Bs) 

 nearly four times as long as width across middle, bluntly rounded at apex, 

 clothed with scales and long setae (setae very numerous and long on inner 

 ventral margin); basal lobe (B-L) prominent, bluntly conical, bearing numer- 

 ous short setae apically and a large, curved spine on dorsal side; apical lobe 

 (A-L) rounded, not prominent, its vestiture consisting of a few short fine 

 setae. Dististyle (Ds) nearly two-thirds as long as basistyle, slightly broader 

 medially; terminal claw (Ds-C) slender, about one-fifth as long as dististyle. 



LARVA. (Fig. 103). — Head broader than long. Antenna slightly less than 

 half as long as head, sparsely spined; antennal tuft small, multiple, inserted 

 near middle of shaft, not reaching tip. Head hairs: Preantennal (A) multiple, 

 barbed, extending beyond insertion of antennal tuft; lower (B) and upper (C) 

 long, single, slightly barbed apically; postclypeal (d) small, multiple; sutural 

 (e) long, single; trans-sutural (f) shorter, double or triple; supraorbital single 

 or double. Body spiculate. Upper lateral abdominal hairs single on segments 

 III to V. Comb of eighth segment of about 15 to 22 thorn-shaped scales in a 

 patch; individual scale with apical spine three or four times as broad and about 

 twice as long as subapical spinules. Siphon about two and one-half times as 

 long as wide; pecten of numerous long slender evenly spaced teeth extending 



Fig. 102. Aedes infirmalus Dyar and Knab. A, Male terminalia. 

 B, Scutum and scutellum. 



