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American Midland Naturalist Monograph No. 3 



ADULT MALE. — Coloration similar to that of female, except that the abdo- 

 men usually has narrow white basal bands dorsally, at least on some segments. 



TERMINALIA (Fig. 119A). Lobes of ninth tergite (IXT-L) about as long as 

 broad, separated by approximately the width of one lobe, each bearing several 

 short spines. Tenth sternite (X-S) prominent, heavily sclerotized beyond 

 middle. Phallosome (Ph) stoutly conical, about one and three-fourths times as 

 long as broad, rounded apically, open ventrally, closed dorsally. Claspette stem 

 (Cl-S) pilose, slender, curved, extending beyond basal lobe. Claspette filament 

 (Cl-F) nearly as long as stem, expanded blade-like, tapered and curved beyond 



C.KAiTan 



Fig. 119. Aedes trivittahis (Coquillett). A, Male terminalia. 

 B, Scutum and scutellum. 



middle; the blade-like portion with a large sharp retrorse projection arising 

 from its basal margin; one or more minute accessory retrorse spines occasional- 

 ly present on inner margin of the large projection or between the large projec- 

 tion and the non-expanded basal portion of 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 numerous short 

 setae apically and a large curved spine on dorsal side; apical lobe (A-L) 

 rounded, not prominent, its vestiture consisting of a few fine short setae. 



