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American Midland Naturalist Monograph No. 3 



ADULT MALE. — Coloration similar to that of female. TERMINALia (Fig. 

 152A). Lobes of ninth tergite (IXT-L) rounded, about as long as broad, sep- 

 arated by about twice the width of one lobe, each bearing several setae. Tenth 

 sternite (X-S) crowned with short blunt spines, arranged in a somewhat comb- 

 like row. Phallosome (Ph) formed of a pair of stout columnar structures 

 (lateral plates) strongly joined like a U-bolt at base and with a narrow trans- 

 verse bridge at apical fourth; apex of each column blunt, crowned with numer- 

 ous small denticles. Claspette absent. Basts tyle (Bs) about two and one-half 

 times as long as basal width, with apex narrow, bluntly rounded; vestiture of 

 numerous setae, longer on outer aspects. Subapical lobe (S-L) prominent, 

 undivided, bearing two strong rods with tips pointed and recurved; four smaller 

 flattened recurved spines, three of which are serrated on one side; and two stout 

 setae. Dististyle (Ds) about half as long as basistyle, curved, slightly con- 

 stricted at basal third, a little broader at apical third, then tapered to apex; 

 terminal claw (Ds-C) about one-fifth as long as dististyle, with tip blunt and 

 somewhat flattened. 



LARVA. (Fig. 153). — Head much broader than long. Antenna about as 

 long as head, constricted beyond antennal tuft, with portion before constriction 

 spinose, portion beyond constriction darker and with coarser and fewer spines; 



B 



-Ds-C 



-IXT-L 



Fig. 152. Culex apicalis Adams. A, Male terminalia. B, Abdomen of female. 



