AEDES WALKERI 849 



middle, the tips broadly silvery-white. Antennae filiform, the joints subequal, 

 rugose, pilose, dark brown, second joint slightly thickened, clothed with black 

 scales on inner side; tori subspherieal, with a cup-shaped apical excavation, 

 luteous, black and with a group of small, flat silvery-white scales on inner 

 side. Clypeus elliptical, prominent, convex, flattened in middle, dark brown, 

 nude. Eyes black. Occiput clothed almost entirely with flat appressed scales, 

 a few lanceolate ones along median line, bluish-black, a narrow silvery-white 

 median line and a broader lateral one, cheeks silvery- white ; bristles along 

 margins of eyes black, those projecting between the eyes pale. 



Prothoracic lobes elliptical, remote dorsally, brown, clothed with black scales, 

 a ridge of white scales in the middle, and with many dark bristles. Mesonotum 

 black, clothed with narrow, curved, dark blackish-brown scales and with six 

 narrow, longitudinal, about equidistant lines of pale-yellow scales, running 

 from anterior margin to scutellum ; the median pair nearly parallel, converging 

 slightly towards antescutellar space; second pair wavy, curved outwardly on 

 anterior half; outer pair marginal and enclosing a dark spot before roots of 

 wings; bristles coarse, the anterior ones black, those over roots of wings 

 and about antescutellar space pale yellow. Scutellum trilobate, brown; 

 vestiture of broad, flat, blackish-brown scales, the mid lobe with a median line 

 of narrower white scales, each lobe with a group of pale yellow bristles. Post- 

 notum elliptical, prominent, blackish, nude, with a slight pruinosity. Pleurse 

 and coxae blackish, clothed with patches of flat, elliptical, silvery-white scales 

 and a small patch of black ones on each coxa ; bristles small, pale. 



Abdomen subcylindrical, tapering posteriorly, sixth and seventh segments 

 expanded apieally beneath ; dorsal vestiture of blue-black scales, a band of yel- 

 low-white ones at base of each segment, broadest at middle and not attaining the 

 lateral margins, those on last two segments silvery ; a series of large, triangular, 

 silvery-white lateral patches, showing in a dorsal view on posterior segments, 

 their hind margins transverse and one point reaching base of segment; venter 

 black-sealed, the segments with broad basal bands of yellowish or silvery-white 

 scales; bristles coarse. Cerci not prominent. 



Wings moderate, hyaline; petiole of second marginal cell about one-third 

 as long as its cell, that of second posterior cell only a little shorter than its cell ; 

 basal cross-vein more than its own length from anterior cross-vein ; scales deep 

 brown, those on costa black with a bluish reflection, the outstanding ones ligu- 

 late, with rounded tips, those on second vein dense and much broader. Halteres 

 whitish, with dark Imobs. 



Legs slender, moderately long; vestiture black, marked with white; femora 

 with a narrow yellowish line beneath which terminates in a silvery-white lateral 

 spot at outer third, tips of anterior pair narrowly, of middle and posterior pairs 

 broadly silvery-white; front and middle tibiae with a narrow yellowish line on 

 outer side, on inner side in hiud pair, bases broadly white beneath ; hind tarsi 

 with a white ring at base of each joint except the last two, which are entirely 

 dark, the ring on the third joint broadest, extending to apical third ; front and 

 mid tarsi with first two joints broadly ringed at base. Claw formula, 0.0- 

 0.0-0.0. 



Length : Body about 4 mm. ; wing 3.5 mm. 



Life history and habits unknown. 



Island of Trinidad, West Indies. 



Ag-ua Santa, July 10, 1899 (P. W. Uriah) ; Trinidad, June, 1905 (A. Busck). 



AEDES WALKERI (Theobald) Dyar & Knab. 



Culex (Stegomyiaf) walkeri Theobald, Men. Culic, 1, 424, 1901. 

 Howardina walkeri Theobald, Men. Culic, ill, 287, 1903. 

 Howardina walkeri Dyar, Journ. N. Y. Ent. See.,, xiii, 27, 1905. 

 Culex walkeri Blanchard, Les Moustiques, 312, 1905. 



