6 INSECUTOR INSCITL^i MTvNSTRUUS 



comb of the eighth segment of many spines in a patch four 

 rows deep, the anterior spines small, the posterior ones large 

 and well separated. Air-tube very long and slender, flared at 

 the base, straight and uniform beyond, some ten times as long 

 as wide; a three-haired small tuft at basal third, a two-haired 

 one near middle and a longer two-haired one at apical third. 

 Pecten of about nine large well separated teeth on basal fourth 

 of tube. Anal segment long, ringed by the plate ; dorsal hairs, 

 two long ones on each side. 



The pupa has long air-tubes, which are pale with two black- 

 ish bands. 



Cotypes, No. 21047. U. S. Nat. Mus., one male and two 

 females, bred from larvae in epiphytic Bromeliacese ; Com- 

 pagnie des Mines d'or. Lawa River, Dutch Guiana (Mrs. J- 

 Bonne-Wepster). March, 1917. 



This species belongs to the subgenus Microculex Theobald. 

 The structure of the genitalia ally it to C. inimitabilis D. & K. 

 and C. ocellatus Theob.. being nearer to the former. The col- 

 oration of the legs, however, is different from that of any 

 species known to us. being in that respect nearest to C. daiimas- 

 tocampa D. & K.. next to which it should be placed. 



Culex ocossa, new species. 



Proboscis and palpi black ; occiput with narrow flat white 

 scales on the sides, narrower at the vertex and mixed with 

 black ones there ; many erect forked black scales. Mesonotum 

 brown, clothed with fine hair-like bronzy brown scales and 

 black bristles ; some of the bristles very long, coarse and dark 

 brown ; median grooves slight ; antescutellar space bare. 

 Abdomen blackish brown above, the segments somewhat paler 

 at the bases on account of the pale bristles, but without bands ; 

 lateral quadrate white basal segmental patches ; venter pale, 

 the segments with apical blackish bands. Legs blackish brown, 

 the femora whitish beneath, unmarked. Wing scales ovate, 

 blackish, with a few linear outstanding ones. 



Male genitalia. Side pieces conical, about twice as long as 

 wide, emarginate at base ; clasp filament simple, tapering out- 



