306 MOSQUITOES OF XOETH AMERICA 



CULEX BISULCATUS (Coquillett) Dyar & Knab. 



Micraedes Msulcatus Coquillett, Proc. Ent. Soc. Wash., vii, 185, 1906. 



Culex Msulcatus Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 208, 1906. 



Culex Msulcatus Dyar, Proc. Ent. Soc, Wash., viii, 18, 1906. 



Micraedes Msulcatus Coquillett, U. S. Dept. Agr., Bur. Ent, Tech. Ser. 11, 24, 1906. 



Culex Msulcatus Pazos, Sanidad y Ben., ii, 49, 558, 1909. 



Micraedes Msulcatus Theobald, Mon. Culic, v, 486, 1910. 



Original Desceiption of Micraedes bisulcatus : 



Scales of palpi and proboscis black, those of the occiput yellow. Mesonotum 

 brown-scaled, a pair of subdorsal bare lines on its anterior three-fourths. Abdomen 

 black-scaled, the front angles of the segments whitish-scaled. Scales of the legs 

 black, those on under side of femora basally whitish; claws of the front and middle 

 tarsi of the male with a tooth under one claw, none under the other, those of the hind 

 feet simple; female with all the claws simple. Scales of wings brown. Length 

 about 3 mm. 



Guadeloupe and Santo Domingo, West Indies. Two males and one female, collected 

 by Mr. A. Busck. 



Type. No. 8291, U. S. National Museum. 



Tlie larva differs widely from that of Aedes fuscus; the body bears many large 

 clusters of rather short, stiff hairs, and there are about eight tufts on the breathing 

 tube. 



Description of Female, Male, and Laeva of Culex bisulcatus: 



Female. Proboscis moderate, slightly swollen at apex, labellae conically 

 tapered; vestiture black, with a purplish reflection throughout; setae minute^ 

 curved black, those on the labellae more prominently outstanding. Palpi long, 

 brown, two-fifths as long as proboscis, three-jointed, last joint longer than the 

 two preceding, with some outstanding setse at base. Antennas moderate, joints, 

 subequal, rugose, pilose, black, second joint stout, swollen; tori subspherical, 

 with a cup-shaped apical excavation, pale, yellowish-brown within ; hairs of 

 whorls sparse, black, and rather short. Clypeus triangiilar, convex, bro^^^l. Eyes 

 black. Occiput black, rather sparsely clothed with narrow, curved, pale scales, 

 in middle, white along margin of eyes and lower parts of sides, many erect, 

 forked brown scales on vertex ; a row of bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, clothed with narrow, curved, pale 

 scales and brown bristles. Mesonotum pale brown, with two narrow, bare, im- 

 pressed lines ; vestiture of coarse but rather sparse narrow, curved bronzy brown 

 scales; bristles brown, long. Scutellum trilobate, pale, clothed with narrow 

 pale brown scales, each lobe with a group of brown bristles. Postnotum ellip- 

 tical, luteous, brown in the middle, nude. Pleurae pale luteous, with rows of 

 brown bristles. 



Abdomen subcylindrical, depressed, truncate at tip, clothed dorsally with 

 black scales, with a slight bronzy and blue-metallic reflection, a row of lateral, 

 triangular, basal, segmental, dull- white spots ; venter clothed with dirty yellow- 

 ish-white scales, tips of posterior segments blackish; apical part of abdomen 

 with coarse brown bristles. 



Wings moderate, hyaline ; petiole of second marginal cell nearly one-fourth as 

 long as its cell, that of second posterior cell considerably shorter than its cell ; 

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

 scales of veins brownish black, with blue luster on costa, long, linear. Halteres 

 white with black knobs, stems slender, the knobs large. 



Legs slender, rather long ; femora black above, basally whitish beneath ; tibiae 

 black, with bronzy and blue luster; tarsi black scaled, with bronzy and blue 

 reflection ; femora and tibiae both dark at tips. Claw formula, 0.0-0.0-0.0. 



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



Male. Proboscis straight, gradually enlarged towards apex. Palpi two-fifths 

 as long as proboscis, slender, uniform, without hairs, vestiture of brown scales, 

 without markings. Antennae with last two joints long and slender, rugose, 



