432 GNATS OR MOSQUITOES — CHAPTER XIII 



77. CULEX RUSTICUS, Rossi (1790). 



= C. ptmctatus, Meigen (1818) ; = C. quadrimaculatiis, Macquart (1834). 



[Fu. Etrusca, torn. sec. Libarni. (1790), Rossi; " S. B," i, (1818) (= ptmc- 



tatus), Meigen; " F. R." p. 280 (1S9G) (= quadrimaculatus).'] 



Tarsi unhanded ; thorax brownish-grey ; abdominal segments 

 brownish, with black lateral spots. 



" Greyish, the abdomen with black spots. Antennte fuscous, witli 

 scanty verticillate hairs ; proboscis black. Thorax greyish ; all the 

 abdommal segments with black spots. Legs fuscous ; hind pair very 

 long ; femora paler, but the apex black. Wings dusky, with the internal 

 margin ciliated and the veins scaled, &c. Length. — 3i lines (Rossi)." 



Meigen describes G. punctatus as follows : — 



"Abdomen ashy-grey, with two rows of black spots, triangular in 

 form ; thorax brownish-grey, with four dark lines ; antennae and palpi of 

 the 3 ) dark brown ; proboscis brown, &c. Length. — 4 lines." 



Macquart describes C. quadrimaculatus as : — 



" Thorax black, with greyish-yellow tomentum, and with the abdomen 



with quadrangular black spots, &c. Length. — 3^ lines." 



Mr. Theobald has no doubt as to the above three names being 



synonymous. 



78. CULEX ALBIFASCIATUS, Macquart. 



(Dipt. Exot, i. 35, 4 (1838), Macquart; Dipt. Argentina, p. 44, ArribAlzaga 

 Verb, zool-bot. Gesell, xv, 596, 6 (1865), Phillipp.) 



Legs unadorned, clothed with brown and grey scales. Thorax 

 black, ornamented with narrow, reddish-brown curved scales, 

 with a median yellow-scaled line and a broad line of yellow 

 scales on each side in front, narrowing behind. x\bdomen dusky 

 brown, with a median yellowish-white line spreading out apically 

 on each segment, and with a basal patch of pure white scales on 

 each side of the segments. Ungues of the ? , equal, uniserrated. 



Head creamy in the middle, dusky at the sides, the linear and forked 

 scales of these areas being of corresponding colours ; lateral fiat scales 

 yellowish ; proboscis and palpi dark brown, in both sexes ; those of ^ , 

 with dense fuscous tufts. Pleurte dark brown, with numerous frosty 

 patches. Legs with the femora pale beneath, and with small white 

 knee-spots. Venter with numerous white scales, very dense apically. 

 Halteres with yellow stems and dusky knobs, covered with gi-eyisli white 

 scales. Length. — About 5*5 mm. 



Habitat. — South America; Brazil, Rio de Janeiro, Buenos Ayres, 

 Chili. " Bites during the daytime, but does not enter houses." 



