AEDES SEXLINEATA 847 



standing. Palpi short, about one-fifth the length of the proboscis; vestiture 

 black, setse moderate, outstanding. Antennae filiform, the joints subequal, 

 pilose, black; second joint slightly thickened, fusiform, pale at base and bear- 

 ing a few black scales; tori subspherical, with a cup-shaped apical excavation, 

 ochraceous, blackish on inner side; hairs of whorls sparse, black, moderate. 

 Clypeus rounded triangular, convex, pale brown, nude. Eyes black. Occiput 

 pale brown, clothed entirely with broad flat scales except a narrow line of curved 

 lanceolate ones medianly, golden yellow, a large patch of black ones on either 

 side of median line and not reaching the eyes ; many erect forked golden yellow 

 scales on the nape ; bristles along margins of eyes black, those projecting between 

 the eyes pale brown. 



Prothoracic lobes elliptical, remote dorsally, ochraceous, with broad yellowish- 

 silvery scfdes and brown bristles. Mesonotum clothed with narrow, curved 

 scales, dark bronzy-brown, with lines of golden yellow; a narrow median line, 

 widening and dividing posteriorly to inclose the antescutellar space, a narrow 

 line on either side of it from anterior edge to posterior fourth, a slightly broader 

 line on sides of disk beginning at the middle and running to posterior border, 

 a broader area along lateral margin, slightly incised by the dark color at its 

 middle and disconnected behind to form a small spot at roots of wings ; bristles 

 coarse, brown. Scutellum trilobate, clothed with narrow, curved golden-yellow 

 and broad, flat black scales, the black scales on the mid lobe divided by basally 

 and apically broadened patch of golden scales ; each lobe with a group of brown 

 bristles. Postnotum elliptical, prominent, luteous, nude. Pleurse brown, coxae 

 luteous, clothed with patches of broad silvery-white scales and rows of brown 

 bristles, the anterior angles broadly clothed with narrow, curved golden scales. 



Abdomen subcylindrical, tapered posteriorly, fifth to seventh segments ex- 

 panded posteriorly beneath ; dorsal vestiture blue-black, a row of median, basal, 

 broadly triangular silvery spots on segments three to seven, the distal three 

 silvery white, the others golden ochraceous; a row of lateral, basal, segmental, 

 subquadrate silvery- white spots ; venter yellowish scaled, the last three segments 

 nearly entirely black-scaled. 



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

 as its cell, that of second posterior cell somewhat shorter than its cell; basal 

 cross-vein distant about its own length from anterior cross-vein ; scales brown, 

 a blue-black reflection on costa, outstanding scales broadly ligulate, narrowly 

 elliptical and denser toward apex of wing. Halteres whitish, with black knobs. 



Legs slender, moderately long; vestiture blue-black; femora white at base, 

 the hind pair silvery beneath for three-fourths their length ; knees of middle and 

 hind legs silver-scaled; tibiae blue-black; basal joint of tarsi white-ringed at 

 base, the other joints blue-black. Claw formula, 0.0-0.0-0.0. 



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



Life history and habits unknown. 



Nicaragua. 



Bluefields (W. F. Thornton). 



AEDES SEXLINEATA (Theobald). 



Stegomyia sexUneata Theobald, Mon. Culic, i, 308, 1901. 



Stegomyia sexUneata Giles, Handb. Gnats or Mosq., 2 ed., 377, 1902. 



Stegomyia sexUneata Theobald, Journ. Trop. Med., vi, 238, 1903. 



Stegomyia sexUneata Blanchard, Les Moustiques, 260, 1905. 



Hwmagogus sexUneata Dyar & Knab, Proc. Biol. Soc. Wash., xix, 166, 1906, 



Ch/mnometopa sexUneata Coquillett, Proc. Ent. Soc. Wash., vii, 183, 1906. 



Gymnometopa sexUneata Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 25, 



1906. 

 Oymnometopa sexUneata Theobald, Mon. Culic, iv, 210, 1907. 

 Gymnometopa sexUneata Theobald, Mon. Culic, v, 219, 1910. 



