426 NEW YORK STATE MUSEUM 



genus in the following particulars. The mandible has but one 

 large bristle or curved spine at the apex (in all specimens exam- 

 ined); the papillae of the maxillae are elongate and sharply 

 pointed; and the blood gills at the posterior end are only two 

 in number. 



The characters of the species are as follows: Head rounded, 

 somewhat flattened; eyes very small, round, and black; rota- 

 tory fan conspicuous; antennae slender, uniformly pale in color, 

 the lateral tuft represented by a single seta, its terminal appen- 

 dages short, consisting of two or three slender setae, a blunt 

 spine and the usual short terminal joint [pi. 47, flg.l]. The man- 

 dibles [fig.2«(] are shaped like those of Culex but appear to have- 

 but one stout, curved seta at the apex; the bearded process 

 caudad of the teeth has a stouter base than in Culex; maxillae 

 [flg.2.r] elongate, pointed papillae and several terminal setae 

 besides the usual long hairs. The labrum resembles that of 

 Culex, the clypeus with a pair of rather elongate blunt spines. 

 Epipharynx as in Culex, though with but two instead of four 

 spines. The labium triangular with a long central tooth and 

 nine teeth on each side of this [flg.2?.] . The gula is apparently 

 without setae. On the dorsal surface of the head between 

 the bases of the antennae in a transverse row are four 

 small setae, and caudad of each of the two inner ones 

 is another. Thorax quadrate, wider than long, lateral margin 

 sinuous; dorsal hairs short, those of the three lateral groups 

 long; abdomen slender, segments subequal in length, the 

 long lateral hairs about of equal length, those on the 

 anterior segment, four to six in number, diminishing in 

 number caudad, so that on the last two segments there are 

 usually but two on each side. The dorsocaudal and ventro- 

 caudal tufts short and composed of two or three hairs. The 

 lateral combs of the eighth segment consist of 15 to 20 stout 

 teeth arranged in a single somewhat irregular transverse row. 

 The air tubes rather short, about three times as long as its 

 greatest diameter; with four rows, each with five or six long 

 setae [flg.6]. The two longitudinal rows of teeth which are 

 present in Culex are entirely wanting. The anal segment is 

 short, with two inflated translucent blood gills and with dorso- 

 caudal, laterocaudal and ventrocaudal tufts of long hairs; the 

 ventral brush wanting. 



The pupa has the posterior margin of the swimming paddles 

 ciliate with short hairs instead of terminating with a single 

 bristle as it does in Culex. Near the anterior margin of the 

 thorax is a pair of long setae, caudad of which are two pairs 

 of short forked hairs. The breathing trumpet [flg.4] is like 



