282 MOSQTJITOES OF NORTH AMEiffCA 



Wings moderate, hyaline ; petiole of second marginal cell less than half as long 

 as its cell, that of second posterior cell about as long as its cell ; basal cross-vein 

 twice its own length distant from anterior cross- vein ; scales blackish brown, the 

 outstanding ones linear, densest on forks of second vein. Halteres whitish. 



Legs moderate, femora white beneath almost to tip; knees white; tibiae and 

 tarsi brownish black, with a slight bluish and bronzy reflection ; tarsi with white 

 bands at base and apex of each joint, very narrow in fore and mid tarsi, rather 

 broad on hind ; tips of tibiae white. Claw formula, 0.0-0.0-0.0. 



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



Male. — ^Proboscis straight, enlai^ed towards apex, vestiture black, with an 

 indistinct paler ring near middle. Palpi exceeding the proboscis by more than 

 the length of the last joint, bron2y brown, end of the long joint and last two 

 joints with long, dense, black hairs, the long joint with a white ring at basal 

 third and a broad pale shade on apical third. Antennae plumose ; last two joints 

 long and slender, rugose, pilose, black, the others short, pale, with black rings at 

 insertion of hair-whorls ; hairs long, dense, dull brown. Coloration similar to 

 the female. Wings narrower than in the female, the stems of the fork-cells a 

 little longer, vestiture more sparse. Abdomen long, slender, with distinct white 

 bands at bases of segments dorsally ; lateral cUiations long but rather irregular, 

 pale yellowish. Claw formula, 1.1-1.1-0.0. 



Length : Body about 4 mm. ; wing 3 mm. 



Genitalia (plate 16, fig. 117) : Side-pieces over twice as long as wide, coni- 

 cally tapered at tip ; marginal appendages on a subapical, low, rounded promi- 

 nence consisting of three rods with hooked tips and a leaf-like appendage and a 

 seta. Clasp-filament slender, rather long, curved, with a small articulated 

 appendage. Harpes furcate, lower branch curved, with a rounded tip, outer 

 bearing a dense terminal tuft of teeth with one large one. Harpagones furcate, 

 the outer one divided into five short teeth. Basal appendages rounded, setose, 

 very short. 



Larva, Stage lY (plate 107, fig. 358). — ^Head rounded, widest through eyes: 

 antennae long, a tuft at outer third, part beyond slender ; shaft dark throughout, 

 spicular; both pairs of dorsal head-hairs in threes. Body glabrous, lateral hairs 

 in twos after second segment ; lateral comb of eighth segment of many spines in 

 a large triangular patch. Air-tube about six times as long as wide, pecten small 

 and covering basal fourth; eight tufts approximately in line along posterior 

 margin. Anal segment a little longer than wide, ringed by the plate; dorsal 

 tuft of three hairs of different lengths on each side ; ventral brush lai^, con- 

 fined by the chitinous ring. Anal gills moderate, upper pair nearly twice as long 

 as the lower pair, all with rounded tips. 



The larvae frequent water in artificial receptacles and probably also pools or 

 tree-holes. Mr. Tower obtained them in tubs which he exposed for the purpose 

 of obtaining mosquito larvae. 



Island of Porto Eico, West Indies. 



Mayaguez, September ( W. V. Tower) . 



CULEX SECUTOR Theobald. 

 Culex secutor Theobald, Men. CuUc, U, 321, 1901. 

 Oulex secutor Giles, Gnats or Mosq., 2 ed., 406, 1902. 

 Oulex secutor Theobald, Mon. Culic, iii, 183, 1903. 

 Culex secutor Blanchard, Les Moustiques, 300, 1905. 

 Culex secutor Dyar, Journ. N. Y. Ent. Soc, xiil, 26, 1905. 

 Culex secutor Theobald & Grabham, Mosq. or Culic. Jamaica, 22, 1905. 

 Culex secutor Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 219, 1906. 

 Oulex secutor Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 23, 1906. 

 Oulex guasisecutor Theobald, Mon. Culic, iv, 398, 1907. 

 Oulex secutor Peryassfl, Os Cullcid. do Brazil, 203, 1908. 

 Culex secutor Theobald, Mon. Culic, v, 355, 1910. 

 Oulex guasisecutor Theobald, Mon. Culic, v, 355, 1910. 



