CULEX MICROSQUAMOSUS 403 



pale gray reflection iu some lights; some scales along ocular margin gray; a 

 patch of dull white scales well down the sides ; many erect, forked black scales 

 dorsally ; a row of bristles along margin of eyes. 



Prothoracic lobes elliptical, remote dorsally, clothed with narrow pale scales 

 and brown bristles. Mesonotum brown, clothed with narrow, curved dark 

 bronzy-brown scales and rows of dark brown bristles. Scutellum trilobate, with 

 similar vestiture to mesonotum, with a tuft of black bristles on each lobe. Post- 

 notum elliptical, prominent, brown, nude. Pleurae and coxas luteous shaded 

 with brownish, with patches of elliptical white scales and rows of brown bristles. 



Abdomen subcylindrical, depressed, truncate at tip; dorsal vestiture black 

 with a bronzy and blue reflection, a row of lateral, triangular, basal, segmental, 

 whitish patches ; venter blackish scaled, a broad whitish baud at base of each seg- 

 ment; apices of segments with rather coarse pale hairs; apex of abdomen, par- 

 ticularly beneath, densely hairy. 



Wings moderate, hyaline; petic^e of second maiginal cell one-third as long as 

 its cell, that of second posterior cell shorter than its cell ; basal cross-vein distant 

 twice its length from anterior cross-vein ; scales of veins brown, with a blue re- 

 flection along costa, dense, long, tips touching on centignous veins, most of the 

 outstanding ones outwardly on second to fourth veins and the upper branch of 

 fifth narrowly ovate. Halteres whitish, with blackish knobs. 



Legs moderate ; vestiture black, with a blue and bronzy reflection on tibias and 

 taisi; femoia whitish beneath except at tip. Claw formula, 0.0-0.0-0.0. 



Length: Body about 2.5 mm.; wing 2.5 mm. 



Larva, Stage IV (plate 112, fig. 380). Head transverse, much broader than 

 long, subquadrate, strongly convex at the eyes. Antennae long, rather slender, a 

 tuft at outer third, the part beyond slender. Upper pair of dorsal head-hairs 

 double, slight, lower pair single ; ante-antennal tufts multiple. Body with skin 

 glabrous ; lateral abdominal hairs in twos on third to sixth segments ; trachea? 

 very narrow. Lateral comb of eighth segment of about eight spines in a single, 

 curved row, lowermost spines very slightly dislocated. Air-tube over three 

 times as long as wide, tapering outwardly, slightly curved forward, terminal 

 hooks large and toothed; nine very long tufts along posterior margin, pro- 

 gressively shortening towards apex of tube, the basal one beyond middle of 

 pecten, all three to five haired; pecten reaching over one-third of tube, the 

 teeth long. Anal segment longer than wide, ringed by the plate; dorsal tuft 

 of two long hairs and a short one on each side ; ventral brush well developed, 

 confined by the chitinous ring. Anal gills moderate, lower pair considerably 

 longer than upper ones. 



The larvae live in ground-pools with aXgse. Mr. Van Duzee says : 



" They were found on top of algae at the side-wall of the inside of a large stone 

 tank in which there were fish. I could find quite a number along the side, but 

 did not find them on the algae towards the middle of the tank." 



Southern Florida. 



Estero, July, 1906 (J. B. Van Duzce). 



CULEX MICROSQUAMOSUS Grabham. 



Culex microsquamosus Grabham, Can. Ent, xxxvii, 407, 1905. 



Culex microsquammosus Dyar & Knab, Journ. N. Y. Ent. See, xiv, 207, 219, 1906. 



Okiginal Description of Culex microsquamosus: 



Adult larva. Collected In algas-covered pools at the Rio Cobre Canal Dam, near 

 Spanish Town, Jamaica, January 17th, 1905. Mentum a wide angle of many teeth, 

 one of the outer teeth on each side rising considerably above the others. Antennae 

 stout and relatively large, lateral tuft of many feathered hairs. Apical hairs simple, 

 2 long, 2 short, a wedge-shaped lamella at apex. 



