AQI'ATIC INSECTS IN NEW YORK STATE 423 



two or three short teeth near the base, the two or three elongate 

 distal spines being separate from the others and from each 

 other. Breathing tube about two and one half times longer than 

 wide. The setae of the ninth segment extend forward from the 

 barred area. 



Pupa. The plane of the margin of the breathing trumpet 

 makes about a 30° angle with its long axis. Specimens taken 

 July 10, 1902, Ithaca N. Y. 



Culex triseriatus Say 



Plate 46 



Acad. Sci. Phila. Jour. 3:12. 4 Compl. Wr. 2:40; Wiedemann, 1:11, 12 



Female. Length 4^-mm. Antennae uniformly grayish, the 

 large basal joint yellowish, the joints of the flagellum ver- 

 ticillate, with a few long, black hairs, besides which the 

 shaft is covered with sparse grayish white, downy hair; pro- 

 boscis fuscous, including its base and the epistome. Palpi 

 one fourth as long as proboscis, cylindric. Occiput covered 

 with silvery white scales; dorsum of thorax with a very 

 broad black stripe, widened posteriorly, where it covers the 

 space to the base of the wing excepting a spot of white 

 scales in the middle line on a line with the bases of the 

 wing; scutellum and metanotum black; the sides of the an- 

 terior part of the dorsum, and the pleura, covered with white 

 scales; abdomen covered with deep black scales. The anterior 

 margin of the dorsal surface of the segments are fasciate with 

 dark brown scales, and the anterior margin of all segments on 

 the ventral surface fasciate with white scales. These latter 

 fasciae extend to the sides and their extremities are just visible 

 on the dorsal aspect. The last segment is yellow, genitalia 

 black; the legs black, the coxae, the flexor surface of all the fem- 

 ora, the bases of the first and second pairs, the basal two thirds 

 of the hind pair, and all the knees, white; tarsi sometimes dark 

 brown. The fore and middle i>air of tarsal claws each with a 

 tooth, those of the hind pair simple. Wings smoky, the scales 

 black, those on the posterior margin brown. Venation as in 

 figure 7. Halteres white. 



Male. Antennae wanting. Like the female in all respects 

 excepting as follows. The black dorsal stripe slightly narrower; 

 the long palpi are black, hypopygium prominent, the front tar- 

 sal claws of unequal size, one long and curved, the other shorter 

 and nearly straight; both with a single tooth on the underside, 

 the middle claws each with a tooth, hind ones simple. Described 

 from specimens bred July 1901. Ithaca N. Y. 



Larva. Length 7 to 8 mm. Head [fig.3] is round, in color 

 brown; in the transverse row between the bases of the anten- 



