444 MOSQUITOES OF NOETH AMERICA 



Type. No. 10871, U. S. National Museum. 



Nearly allied to Culex imitator Theobald, but the thoracic markings less silvery 

 and the tarsal bandings narrower. 



We describe this form as a variety of Culex jenningsi Dyar & Knab, in which the 

 thorax is ornamented. The basal abdominal bands of jenningsi are lost in this form, 

 but may be seen under the microscope as 3 or 4 scales at the bases of the segments. 

 The white rings on the tarsi are of a different width. 



The larva Is closely similar to that of Culex rejector Dyar & Knab, unbred, found 

 in Bromelias at Cordoba, Mexico. It is possible that the species is the same, but we 

 await the receipt of adults from Mexico before a final decision. 



Desceiption of Female, Male, and Larva of Culex jenningsi: 



Synopsis of Varieties. 



Thorax adorned with yellowish silvery gray markings gaudeator Dyar & Knab 



Thorax unadorned, uniformly brown-scaled jenningsi Dyar & Knab 



Female. Proboscis slender, uniform, labellge conically tapered; vestiture 

 bronzy black, setag minute, curved, black, those on labellse more prominently out- 

 standing. Palpi short, less than one-fourth as long as proboscis, slender, bronzy 

 black. Antennffi moderate, joints subequal, rugose, pilose, black ; hairs of whorls 

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

 luteous, darker within. Clypeus rounded triangular, brown, nude, small. Eyes 

 black. Occiput blackish, clothed broadly with shining, pale ochraceous, narrow 

 curved scales, the ocular margin white scaled ; many slender, erect, forked, dark 

 brown scales dorsally ; cheeks clothed with broad, flat, silvery white scales. 



Prothoracic lobes elliptical, remote dorsally, brown, clothed with narrow 

 whitish scales and black bristles. Mesonotum dark brown, a median impressed 

 line, on either side of it a narrow bare stripe ; vestiture of small, narrow, curved, 

 uniformly bronzy-blackish scales, or the scales on anterior and lateral margins 

 and a pair of spots on middle of disk shining pale yellowish, those surrounding 

 ante-scutellar space grayish white. Scutellum trilobate, clothed with narrow, 

 curved silvery scales, each lobe with a group of black bristles. Postnotum 

 elliptical, prominent, dark brown, nude. Pleurae green, with a transverse 

 dark band under the wing and another across the middle ; some patches of small, 

 elliptical silvery white scales ; coxae pale greenish. 



Abdomen subcylindrical, depressed, truncate at tip; dorsal vestiture black 

 with a deep bronzy reflection, a row of narrow basal segmental white bands, or 

 median dorsal basal segmentary patches of white scales, or unhanded, a row of 

 lateral, basal, segmental, triangular white patches, joining bands when present; 

 first segment with a patch of black scales and many pale hairs ; venter whitish 

 scaled. 



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

 as its cell, that of second posterior cell as long as its cell ; basal cross-vein dis- 

 tant more than its own length from anterior cross-vein; outstanding scales of 

 veins rather long, linear, brown, those on the costa blackish with a bronzy and 

 blue luster, scales on fork of second vein denser, but all linear, truncate at tips. 

 Halteres whitish, with black knobs. 



Legs slender, long; vestiture black with a blue and bronzy reflection; hind 

 femora broadly white beneath nearly to tip ; knees white ; tibiae narrowly white 

 at base and apex ; hind tarsi with narrow white rings at bases of all the joints, 

 broad in some specimens; fore and mid tarsi unhanded. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 3.5 mm. ; wing 2.5 mm. 



Male. Proboscis gradually enlarged towards apex. Palpi about as long as 

 the proboscis, slender, uniform, the tip blunt, with a few stout hairs towards 

 tip; vestiture uniformly black. Antennae plumose; last two joints long and 

 slender, rugose, pilose, black, the others short, whitish, with black rings at 



