324 NEW YORK STATE MUSEUM 



which form a line along the posterior margin of the eyes; erect 

 black scales rather sparse. Prothorax light brown, with distinct, 

 narrow, median and submedian lines, each bordered by a rather 

 thick row of golden yellow scales; other portion of prothorax 

 rather sparsely clothed with golden yellow scales and ornamented 

 laterally with long, black setae. Plenra clothed with irregular 

 patches of silvery' w^hite scales. Scutellum slaty brown, with 

 median and lateral patdies of golden yellow spines; postcutel- 

 lum smooth, pinkish. Base of halteres semitransparent, pinkish, 

 apical portion capitate, dark brown. Abdomen dark brown, pro- 

 fusely ornamented with orange and yellowish white scales in the 

 form of broad, basal bands, the median portion being narrow and 

 composed of orange scales, while the lateral portion extends 

 almost the entire length of each segment and forms a nearly 

 complete, lateral, yellowish white line ; median and posterior por- 

 tions of each segment dark brown with a few orange and yellow- 

 ish white scales, the latter nearly covering the antepenultimate 

 segment. Abdomen clothed laterally with long, silky, white hairs ; 

 ventral surface suffused with silvery white scales. Wings hyaline, 

 clothed with dark brown scales, the fringe being a slaty gray and 

 composed of scales of various length, as in O. p i p i e n s , and the 

 costa and subcosta flaked with silvery white scales. Petiole of 

 first submarginal cell nearly one half the length of the cell, that 

 of the second about three, fourths. Posterior cross vein close to 

 the mid cross vein and sometimes almost interstitial. Coxae 

 whitish, semitransparent; under surface of femora and tibiae 

 whitish, other portions dark brown flecked with yellowish white 

 scales and with apical white bands; tarsi black, sparsely flecked 

 with white scales, claws simple. 



Described from a freshly bred specimen. 



The larva of this species was found in association with those of 

 Anopheles punctipennis, Culexterritans and 

 C. sylvestris. It was easily recognized in the water by 

 its size and dark color, it being about as large as the larva of 

 C. can tans or 0. c i nereob o rea li s, and occurred singly 

 in water several inches deep, comin,g to the surface only after 

 rather long intervals. 



Antennae rather stout, slightly curved and somewhat en- 

 larged at the base, apical portion fuscous; a well developed 

 tuft of plumose hairs slightly before the middle; two long 

 subapical, two long apical spines and a short, stout process 

 on the tip. Labial plate broadly rounded, triangular, with about 



