262 MOSQUITOES OF NORTH AMERICA 



the last two joints somewhat thickened and clothed with long black hairs ; vesti- 

 ture entirely of black scales above, beneath with shining silvery scales, except at 

 tips of the joints. Antennae plumose ; last two joints long and slender, rugose, 

 pilose, black, the others short, whitish, with black rings at insertions of hair- 

 whorls; hairs of whorls long, dense, black. Coloration similar to the female. 

 Abdomen elongate, subcylindrical, somewhat broadened apically, basal pale 

 bands somewhat broader than in the female; without distinct lateral ciliation, 

 but with numerous coarse hairs on apical portion. Wings narrower than in the 

 female, the stems of the fork-cells longer, vestiture less abundant; basal cross- 

 vein less than twice its length from anterior cross-vein. Claw formida, 

 1.1-1.1-0.0. 



Length : Body about 3.5 mm. ; wing 3 mm. 



Genitalia (plate 13, fig. 95) : Side-pieces three times as long as wide, tips 

 conically tapered, marginal appendages on a long, narrow, truncated, subapical 

 prominence, consisting of two rods, the outer one much longer and thicker. 

 Clasp-filament strongly inflated in the middle, on the outer side with a long, 

 slender, terminal appendage. Harpes furcate, inner lobe broad, produced, bear- 

 ing a crown of spines. Harpagones divided into several plates. Basal appendages 

 remote, rounded, bearing several short setse. 



Larva, Stage IV (plate 100, fig. 331). — Head rounded, slightly wider than 

 long; antennae long, stout, spinulate, a large tuft at apical third, the part 

 beyond it slender, smooth; upper pair of dorsal head-hairs in fours, lower 

 pair in threes, the ante-antennal tuft multiple. Body with the thorax finely 

 spicidate; lateral abdominal hairs in twos after the first segment. Comb 

 of eighth segment of many spines in a triangular patch. Air-tube seven times 

 as long as wide, pecten short, not reaching the basal third, followed by four 

 tufts, either two or three haired, the subapical one removed out of line and 

 situated beyond outer third of tube; terminal hooks minute. Anal segment 

 about as long as wide, ringed by the plate; dorsal tuft of four hairs of different 

 lengths on each side; lateral hair small, single; ventral brush confined by the 

 chitinous ring. Anal gills small, shorter than the segment, equal. 



Type : No. 12198, TJ. S. Nat. Mus. 



The larvae live in crab-holes containing fresh water. Mr. Busck found them 

 in a deep crab-hole near a river, and in a hole in marshy land along a river, 

 possibly originally a crab-hole. 



Island of Santo Domingo, West Indies. 



Santo Domingo, August 7 and 8, 1905 (A. Busck). 



CULEX HABILITATOR Dyar & Knab. 

 Culex hatilitator Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 206, 212, 1906. 

 Obioinai, Descbiption of Cuuex habilitatob: 



Antennae with the tuft at outer third, all dark. Head hairs, the upper tuft in four 

 or five, the lower in three. Body pilose; lateral hairs in twos after the second ab- 

 dominal segment; subdorsal hairs in threes on segments 3 to 7. Air tube very long, 

 8X1, the pecten reaching nearly one-third. 



The larvae were collected by Mr. Busck in a small pool in a cave in coral cliffs near 

 the ocean in San Domingo and in a large crab-hole in a lagoon along a river, but these 

 last are referred here with doubt as the condition of the skins is imperfect. The 

 specimens were named " Gulex secutor Theob." 



The following is an abstract of the table : 



1. Antennae with the tuft outwardly placed, the part beyond slender. . 5 

 5. Air tube four times as long as wide or over 7 



7. Anal appendages four, normal g 



8. Air tube with four paired tufts posteriorly outwardly (sometimes 



increased by additional ones basally), the subapical one 

 moved laterad out of line, usually situated at the outer third 

 of the tube 14 



