446 GNATS OR MOSQUITOES — CHAPTER XIII 



dusky-brown scales, with basal dull white bands, and white scales 

 at the sides. 



? . — Head dark brown, depressed in the middle line, covered with 

 creamy curved scales and with ochreous upright forked ones behind, 

 black bristles, and a few yellowish ones projecting forwards between the 

 eyes ; eyes dark, with a narrow pale border ; face reddish ; palpi, reddish- 

 brown, with a few pale scales on the inside ; proboscis dark brown, very 

 long. Pleurte bright brown with scattered pale scales. Legs yellowish- 

 brown, with pale knee- spots, and the femora dusky above. Halteres 

 with ocln-eous stems and dark knobs. Length. — About 6'5 mm. 



Habitat. — America, from Colorado to Hudson's Bay. 



94. CULEX SYLYiE, Theobald (Monog. II, p. 96). 

 (Described as a sub-species of C. nigripcs, Zetterstedt. ) 



Tarsi uniformly black. Thorax black, with reddish-brown 

 scales in the middle, pale scales at the sides. Abdomen black, 

 with basal white bands, in both sexes. Palpi and proboscis 

 black ; posterior cross vein close to the mid cross vein. 



Head dark brown, with narrow curved, pale creamy scales, and dark 

 upright forked ones, flat creamy scales at the sides ; antennte black ; 

 basal joint black, with a few grey scales ; palpi of $ , black scaled, with 

 a few dull gi'ey ones at the tips, last joint broad ; those of ^ , black with 

 the third joint and the end of the fourth much dilated, rather shorter 

 than the proboscis, which is intensely black ; clypeus black. Plevu-ae 

 dark brown with white patches. Legs black, with white knee-spots ; 

 the undersides of the femora rather paler. Venter white. Male claspers 

 with spirally curved claws. Length. — About 5 lum. 



Habitat. — New Forest, Hampshire ; June. 



95. CULEX PERYIGILANS, Bergroth. 

 (Wiener Entomolog. Zeitung, p. 295 (1889), Bergroth.) 



Tarsi uniformly nearly black. Thorax dark brown, with dull 

 golden scales more or less longitudinally arranged, with traces 

 of two median parallel bare lines. Abdomen black, with basal 

 white bands ; venter white scaled with median black spots. 

 Ungues of the $ , small, much curved, equal and simple; in the 

 (J , the fore and mid ungues are unequal, uniserrated, the hind 

 equal and simple. 



Head yellowish, with mimerous black bristles projecting forwards and 

 narrow eye borders: palpi of $ , thick, black, with a few scattered scales ; 

 those of <y , longer than the proboscis by all the last and half the next 



