MOSQUITO BIOLOGY 176 



grayish on sides. Abdomen blackish brown with narrow bands of yellow- 

 ish white. Legs dark brown, narrowly banded with silvery yellowish.] 



DESCRIPTION 



Howard, Dyar, and Knab (12) give the following description: 



"Female. Proboscis long, uniform, labellae conically tapered; vesti- 

 ture black, with a bronzy luster, labellae brownish ; setae small, curved, 

 black, those on labellae more prominently outstanding. Palpi short, 

 one-fifth as long as proboscis, clothed with blackish scales, the tips yel- 

 lowish scaled, with many short, stiff setae. Antennae long, the joints 

 subequal, rugose, pilose, black, second joint slightly enlarged; hairs of 

 whorls rather short, sparse ; tori subspherical with a cup-shaped apical 

 excavation, yellowish, brown on inner side. Clypeus rounded triangular, 

 blackish, nude. Occiput dark brown, rather sparsely clothed with 

 coarse, narrow, curved, pale yellow scales, denser towards the sides, 

 margins of eyes and the cheeks white scaled, scales on lower part of 

 sides flat ; many very slender, erect, forked black scales, most numerous 

 on the nape and sublaterally ; setae along margins of eyes rather short, 

 curved, black. 



"Prothoracic lobes elliptical, remote dorsally, with narrow white 

 scales and many black setae. Mesonotum dark brown, reddish brown in 

 two approximated longitudinal bare convex stripes and two others 

 posteriorly at sides of antescutellar space; vestiture of short hair-like 

 bronzy brown scales in two broad stripes at outer sides of bare sub- 

 median stripes and on posterior half of disk, coarser pale yellowish ones 

 in a median stripe ; on sides of disk anteriorly, about lateral depression, 

 about the antescutellar space, and along the posterior bare stripes. 

 Scutellum trilobate, brown, clothed with narrow, curved, shining pale 

 yellow scales, each lobe with a large group of brown bristles. Postnotum 

 elliptical, prominent, brown pruinose, nude. Pleurae and coxae luteous, 

 with darker spots and patches of lanceolate whitish scales and rows of 

 pale bristles. 



"Abdomen subcylindrical, depressed, truncate at tip ; dorsal vesti- 

 ture of blackish brown shining scales, bases of segments with pale yel- 

 lowish narrow bands ; first segment with a small patch of white scales in 

 the middle and with many pale hairs ; venter sparsely clothed with pale 

 dirty yellowish scales, and numerous dark hairs. 



"Wings ample, hyaline ; petiole of second marginal cell much shorter 

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

 vein distant almost its own length from anterior cross-vein ; scales 

 brown, those on costa black, the outstanding ones numerous, broadly 



