

Anopheles aitkeni. 



Head black, with a few white spindle-shaped scales in front 

 and long narrow deep brown upright-forked scales behind. There 

 is no marked frontal tuft of hairs. Palpi covered with small black 

 scales and with no trace of banding. Antennae with long black 

 hairs at the joints. Proboscis brown. 



Thorax dark brown, with long brown hairs but without scales. 

 Scutellum with long dark bristles. 



Abdomen black, without scales, but with many long brown hairs. 



Wings with the veins completely clothed with dark scales. 

 The first sub-marginal cell is much longer and narrower than the 

 second posterior cell. 



The supernumerary cross vein is internal to the mid-cross vein. 

 Posterior cross vein internal to mid-cross vein and nearly opposite 

 supernumerary cross vein. 



Legs brown throughout. The coxae are pale. There is no 

 trace of banding at any of the joints. The hind first tarsal segment 

 (metatarsus) is longer than the tibia. 



Characters of the larva 'Fig. facing text 1. Median frontal 

 hairs stout and bifurcated like the prongs of a pitchfork ; external 

 angular hairs simple, short, and unbranched. Palmate hairs well- 

 developed on the second to the seventh segments. Terminal filament 

 of each leaflet not sharply marked off from the body and rather short. 



Habitat and observations. Collected near Karwar by Dr. 

 Cogill, and on the hills above Karwar (Goa frontier) by Mr. Aitken. 



This mosquito very closely resembles bifurcatus and algeriensis, 

 but according to Mr. Theobald it can be at once distinguished from 

 those species by the striking dissimilarity in the size of the fork cells. 



22. ANOPHELES IMMACDLATUS (Theobald). 



References : Theobald, Monog. Culicid., Vol. Ill, p. 23 ; James, " Malaria in 



India," p. 45. 

 Anopheles immaculatns (Theobald). 



The single representative of this species was caught by Dr. 

 Stephens, of the Royal Society's Malaria Commission, at Bnnur, 

 near Madras. The following is Mr. Theobald's description :- 



Thorax ashy-brown, with darker marks and pale hairs ; abdomen 

 brown, with golden hairs, most dense apically ; palpi shorter than 

 usual, brown, becoming ochraceous to almost white apically ; legs 



1 20] 



