AEDES OSWALDI 817 



before the apex, white-scaled; both ends of the first joint of the middle and hind 

 tarsi, covering nearly the entire joint on the middle tarsi, and base of the second 

 joint, white-scaled; claws of front and middle tarsi with one tooth under one of the 

 claws, none under the other, claws of hind tarsi simple. Wing-scales brown. 

 Length 3.5 mm. 



Trinidad, West Indies. Five males collected by Mr. August Busck. 



Type. No. 8290, U. S. National Museum. 



The genus Verrallina Theobald was founded on female specimens only and was 

 referred by its author to the subfamily Aedeomyinae, but the present species clearly 

 belongs to the Culicinae. 



Description of Female, Male, and Larva of Aedes oswaldi: 



Female. Proboscis rather long, slender, subcylindrical, uniform; labellae 

 conically tapered; vestiture black; setas short, curved, black, those on labellae 

 more prominently outstanding. Palpi short, about one-fifth as long as the 

 proboscis, rather slender ; vestiture, black, the setae moderate. Antennae fili- 

 form, the joints subequal, rugose, pilose, black; tori subspherical with a cup- 

 shaped apical excavation, brown; hairs of whorls moderate, sparse, black. 

 Clypeus rounded, triangular, depressed, blackish-brown, nude. Eyes black. 

 Occiput blackish, clothed with rather broad, curved scales, broader flat ones on 

 the sides, silvery white, a small black patch well up the sides near eye-margin, 

 many erect forked pale scales on the nape; setae along margins of eyes black, 

 those projecting between eyes pale. 



Prothoracic lobes elliptical, remote dorsally, blackish, with broad silvery 

 scales and brownish-black bristles. Mesonotura dark brown, clothed with 

 narrow, curved dark bronzy-brown scales, anterior halves of lateral areas 

 covered by large patches of silvery-white broader scales which are divided by a 

 narrow median stripe and narrowly continued along margins to roots of wings ; 

 a very narrow median white line between the humeral patches. Scutellum trilo- 

 bate, blackish, clothed with narrow curved dark brown scales, each lobe with a 

 group of brownish-black bristles. Postnotum elliptical, prominent, blackish 

 brown, nude. Pleurae black, coxae brownish luteous, clothed with patches of 

 elliptical silvery white scales and rows of dark bristles. 



Abdomen subcylindrical, flattened anteriorly, tapering and compressed pos- 

 teriorly, the venter with a median ridge and with the fifth, sixth and seventh 

 segments apically expanded ; dorsal vestiture violet-black, a row of lateral, seg- 

 mental, basal silvery-white patches, their dorso-apical angles near middles of 

 segments ; venter black-scaled, banded with silvery white at bases of segments. 

 Cerci black. 



Wings moderate, hyaline; petiole of second marginal cell shorter than its 

 cell, that of second posterior cell also slightly shorter than its cell ; basal cross- 

 vein distant more than its own length from anterior cross-vein ; scales dull 

 brown, costa with a bluish reflection, a line of silvery scales at base extending 

 about one-seventh the wing-length; the outstanding scales of veins narrowly 

 ligulate, those on forks of second vein dense and broader. Halteres whitish. 



Legs slender, rather long; vestiture violet-black; front and mid femora with 

 a silvery-white line beneath except at extreme base and apical third, mid pair 

 silvery-white at apices; hind femora white, with a narrow black ring near base 

 and a broad one near apex, the apex broadly silvery- white ; fore tarsi with a 

 minute white spot at base and tip of first and at base of second joint; mid 

 tarsi with the first joint white, very broadly ringed with black mesially, the 

 second joint white on basal third ; hind tarsi with apical fourth of first joint 

 and basal third of second joint white, a white spot at base of first joint. Claw 

 formula, 1.1-1.1-0.0. 



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



