318 MOSQUITOES OF NOETH AMERICA 



We have described Culex delys from a single adult without knowing the larva, 

 since it seems so distinct. The character of narrow scales on the occiput is very 

 unusual in the species with which it groups on other characters. Of snch species 

 only Culex melanurus possesses similar scale? but is otherwise not allied to the 

 present form. 



CULEX PECCATOR Dyar & Knab. 



Culex peccator Dyar & Knab, Smiths. Misc. Colls., quart, iss., lii, 256, 1909. 

 Culex peccator Thibault, Proc. Ent. Soc. Wash., xii, 20, 1910. 



Oeiginal Description of Culex peccator: 



Proboscis rather long and slender, very slightly enlarged towards the apex, black- 

 scaled; palpi short, black. Occiput clothed with broad, flat, bronzy black scales. 

 Mesonotum clothed with bronzy black scales. Abdomen subcylindrical, truncate at 

 the tip, clothed above with dull black scales; a row of white lateral triangular basal 

 segmental spots; venter whitish, the last two segments with dark apical bands. 

 Wings with the outstanding scales of the veins dense, spatulate on the forks of the 

 second and fourth veins and on the third vein. Legs dark-scaled, the femora pale 

 beneath. Length, 3 mm. 



Eleven specimens, Scott, Lonoke County, Arkansas, September 30 to October 8, 

 1908 (J. K. Thibault, jr.). 



Type no. 12192, U. S. N. M. 



Description of Female and Male of Culex peccator (Larva Unknown) : 



Female. Proboscis rather long and slender, somewhat expanded towards tip, 

 labellre conically tapered ; vestiture black, paler beneath, labellas pale, with small 

 outstanding setae. Palpi short, one-sixth as long as proboscis, blackish brown. 

 Antennae moderate, joints subequal, rugose, pilose, black, hairs of whorls sparse, 

 moderate, black ; tori subspherical with a cup-shaped apical excavation, luteous 

 brown, darker on inner side. Clypeus rounded triangular, blackish, nude. Eyes 

 black. Occiput black, clothed with narrow, curved, pale bronzy scales on nape, 

 flat ones over sides to vertex, blackish brown above, white below, and numerous 

 erect, forked black ones on vertex; margins of eyes dark scaled ; a row of coarse 

 black bristles along margins of eyes. 



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

 and dark bristles. Mesonotum dark brown, vestitnre of lanceolate dark-brown 

 scales with a slight bronzy luster and stiff brown bristles. Scutellum trilobate 

 with vestiture similar to that of mesonotum, each lobe with a tuft of dark brown 

 bristles. Postnotum elliptical, prominent, dark brown, nude. Pleurae brown, 

 coxas luteous, with patches of white scales and rows of pale bristles. 



Abdomen subcylindrical, depressed, truncate at tip ; dorsal vestiture of dull- 

 black scales, a row of lateral basal segmental yellowish-white triangular spots ; 

 venter yellowish-white scaled, last segment blackish ; hind margins of segments 

 with yellowish hairs, the end with numerous bristles. 



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

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

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

 scales of veins narrowly ovate, denser and broader on forks of second and fourth 

 veins and apical half of third, brown with blue reflection on costa. 



Legs moderate, femora whitish beneath ; tibiae and tarsi black with a slight 

 bronzy reflection, paler beneath, tips of tibiae black. Claw formula, 0.0-0.0-0.0. 



Length : Body about 3 mm. ; mng 3 mm. 



Male. Proboscis long, straight, very slightly swollen towards apex, bronzy 

 black. Palpi exceeding the proboscis by the length of the last joint, slender; last 

 two joints with a few fine black hairs; vestiture entirely of blackish scales. 

 Antennae rather long, plumose ; last two joints long, the last one slightly swollen, 

 rugose, pilose, black, the others rather short, whitish, with black rings at in- 

 sertions of hair-whorls; hairs long, dense, black. Coloration similar to the 



