452 GNATS OR MOSQUITOES — CHAPTER XIII 



106. CULEX UNCUS, Theobald (Monog. II, p. 53). 



Tarsi black. Thorax chestnut-brown, with tawny and black 

 scales and a few lateral pale ones. Abdomen brownish-black, 

 with basal white patches, which extend in some cases nearly 

 across the segments, to form incomplete bands. Clypeus very 

 blunt and broad. Knobs of the pale halteres, hook-shaped. 



? . — Head and appendages black, save for narrow creamy orbits, which 

 are wider behind, and expand below to join with the lateral tiat-scaled 

 patches of the back of the head, which are of the same colour. Pleurte 

 yellowish-brown, with whitish patches. Legs nearly black, except the pale 

 undersides of the femora. Venter white banded. Length. — 4 mm. 



Habitat. — Straits Settlements ; amongst plantaiiis in the Klang 

 jungle. 



107. CULEX PRUINOSUS, Theobald (Monog. II, p. 32). 

 (Rapt. Liverpool School Trop. Med. 1901.) 



Tarsi uniformly brown. Thorax covered with frosty-grey 

 scales, with traces of two parallel darker lines. Abdomen with 

 the last three segments with basal lateral white spots, almost 

 forming bands, bases of the other segments slightly paler, in the 

 3 , with more or less distinct banding. Wings with fork of II 

 over four times the length of its stem ; that of IV more than twice ; 

 3 and 4 forming a very acute angle. Tarsal claws of $ , equal 

 and simple ; those of ^ , very unsymmetrical, each with an extra 

 claw in fore and mid legs. 



Head brown, clothed with hoary, narrow curved, and numerous 

 ochreous upright forked scales ; clypeus and proboscis, deep brown ; 

 antennie brown, basal joint paler; palpi of $ , nearly black ; those of J", 

 ochreous, with dark brown scales, and black brushes on the last two joints, 

 with a narrow pale band near the base. Scutellum frosty ; pleurai 

 ochreous, darker above. Legs nearly brown, saving the nearly white 

 undersides of the femora. Halteres ochreous. Length. — About 5 mm. 



Habitat. — West Africa. 



108. CULEX SERICEUS, Theobald (Monog. II, p. 147). 



Tarsi uniformly brown. Thorax rich dark brown, with narrow 

 curved dusky-bronze scales, with a narrow median dusky line, and 

 a linear dusky patch on each side in front. Abdomen dark brown, 

 with dull ochreous basal bands, often indistinct. A broad grey 

 band round the head in front. 



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