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American Midland Naturalist Monograph No. 3 



on outer aspect and numerous long setae on inner ventral margin; basal lobe 

 (B-L) prominent, conical, directed mesad, with numerous small apical setae 

 and a stout slightly curved lateral spine; apical lobe (A-L) a prominent thumb- 

 like projection bearing fine setae. Dististyle (Ds) a little broader medially, 

 approximately two-thirds as long as basistyle; terminal claw (Ds-C) slender, 

 nearly one-fourth as long as dististyle. 



LARVA. (Fig. 101). Head broader than long. Antenna moderate in length, 

 spinose; antennal tuft multiple, inserted a little before middle of shaft. 

 Head hairs: Preantennal (A) long, multiple, nearly reaching tip of anten- 

 na; lower (B) double, sometimes triple; upper (C) triple, postclypeal (d) 

 small, branched; sutural (e) trans-sutural (f) and supraorbital usually double. 

 Upper lateral abdominal hairs usually double on segments III to VI. Comb 

 of eighth segment of numerous scales in a patch; individual scale with lateral 

 spines nearly as long as apical spine. Siphon a little more than three times as 

 long as wide; pecten of numerous evenly spaced teeth not reaching middle of 

 siphon; subventral tuft large, multiple, barbed, inserted beyond pecten. Anal 



Fig. 101. Larva of Aedes grossbecl^i Dyar and Knab. A, Terminal 

 segments. B, Comb scale. C, Pecten tooth. D, Head. 



