196 Journal New York Entomological Society. [Voi. x. 



slightly tapered, infuscated ; a double posterior pecten, small tuft and 

 several pecten teeth beyond the tuft. Anal segment with a small 

 dorsal plate, dark, not reaching the middle of the sides ; ventral brush 

 confined to the barred area* which is roundedly elevated. Anal 

 finger-shaped processes long, sometimes very long, with conspicuous 

 tracheal branches. Lateral comb a long triangular patch of small 

 spines about five rows deep. 



Pupa. — As usual, rather small, dark, the tubes funnel-shaped, 

 moderate. The pupa is heavier than usual, rising but slowly and 

 sometimes even resting on the bottom of the pool without moving. 



Culex sylvestris Theobald. 



Egg. — Laid singly or in groups, adherent by capillary action only, 

 floating for a time, ultimately sinking to the bottom. Elliptical, 

 fusiform, the ends rounded, pointed and about alike, the microfiylar 

 one differentiated by a slight apical flattening ; one side more flattened 

 than the other. Smooth, shining black, free of mucilage and without 

 granules, coarsely reticulate, the reticulations much elongated in the 

 length of the egg, forming long lines or < hains. Length, .6 mm. ; 

 width, .2 mm. 



Stage IV. — - (PI. XVL Fig. 3.) Head rounded, light brown ; an- 

 tennae slender, moderate, slightly tapering, the small tuft before the 

 middle ; infuscated outwardly, pale at base. Body hairs short, stout, 

 the thoracic ones from large infuscated tubercles, the abdominal ones 

 double. Tube moderate, about two and a half times as long as wide, 

 slightly tapered, with double posterior pecten on basal half, their 

 spines dark and three-branched (Fig. 3, A'), the terminal two usually 

 detached and larger, the tuft beyond rudimentary. Anal segment 

 very broadly plated, almost, but not quite ringed, the plate pale brown. 

 Dorsal tuft and ventral brush normal, the latter with several small 

 tufts before the barred area. Lateral comb of about twelve large 

 thorn-shaped spines in an irregular, partly double row (Fig. 3, B). 

 Anal finger-shaped processes normal, tapered, but the tips rather 

 bluntly rounded. 



Pupa. — Normal, rather large, the tubes slender, funnel-shaped, 

 moderate. 



* There are tufts before the barred area in stages II and III, but they are absent 

 in stage IV in all larvae examined except one. These small tufts are present in cana- 

 densis, with which this species is nearly allied, in stage IV as well as earlier. 



