470 A Monograph of Culicidae. 



scales, black on costa and on all the third long vein, on the 

 branches of the fourth and some on the sixth, all the rest dull 

 yellowish with a few dusky scales here and there. First sub- 

 marginal cell longer and narrower than the second posterior, its 

 base not nearer the base of the wing, its stem less than one-half 

 the length of the cell ; posterior cross-vein more than its own 

 length distant from the mid. 



In the Sudan specimen the yellow scales are confined to the 

 base of the first longitudinal vein and along the stem of the fifth 

 long vein, and a few may be detected here and there elsewhere. 



Length of 9 3 * 5 to 4 • 5 mm. ; $ 4 • 5 to 5 mm. 



The Sudan specimen came from the Blue Nile (Mr. Friedrichs). 

 This insect has evidently a wide distribution, for there seems to 

 be no difference between those from Africa and those from the 

 Malay States. Dr. Aubrey Hodges has recently written me that 

 it is common around Gondokoro and Mr. C. S. Banks and Miss 

 Ludlow that it occurs in the Philippine Islands. Mr. Banks 

 tells me the eggs are laid separately. 



Var. pallida, n. v. 



9 . Head deep brown, with narrow-curved pale grey scales 

 in the middle. 



Thorax deep brown, with a broad line of pale silvery grey 

 scales on each side diverging posteriorly and with four median 

 parallel narrow pale lines ; chaetae as in the type. 



Abdomen with traces of pale basal lateral spots. 



Wings with broad pale creamy scales on the sub-costal, base 

 of first long vein, on the fifth from the fork to base, narrow 

 lateral ones on the second and fourth, some appearing slightly 

 swollen at their apices. 



For the rest the same as the type. 



Length. — 4 * 5 to 5 mm. 



Habitat. — Inkutu, West Africa (Drs. Dutton and Todd). 



Observations. — Described from two 9 ? s. It resembles the 

 type, but the pale scales and median parallel pale lines at once 

 separate it. There are no structural differences observable. 



Var. albothorax. u. v. 



9 . Head with narrow-curved pale grey to white scales in 

 the middle, deep brown flat scales at the sides and then white 



OIK'S. 



