Anopheles nigerritnus. 



Habitat and observations. This species occurs in the outskirts 

 of Calcutta and in several places in the plains of Bengal, in the 

 Central Provinces, in the Punjab (Lahore), in Assam, and in the 

 South of India. It has also been met with in Bombay and many 

 other parts of India where suitable breeding grounds are present. 

 Outside India it occurs in Burmah, the Straits Settlements and the 

 Malay States. Its larvae are usually found in deep dark pools with 

 much vegetation. In Lahore they occur in the lily ponds of the 

 public gardens. Tanks overgrown with green weed are also favorite 

 breeding grounds. It has been shown that, under experimental 

 conditions, human malaria parasites can develop in this species, 

 but it is doubtful whether it ever acts as a carrier in nature owing 

 to its rarity in houses. 



2. ANOPHELES NIGERRIMUS (Giles). 

 Coloured Plate III. 



References : Giles, Handbook Mosq., 1900, p. 161 ; 2nd Ed., p. 306, and Rev. of Anoph., 

 p. 38 ; Theobald, Monog. Culicid., Vol. I, p. 150 ; Donitz, Zeit. f . Hyg., XLTII, p. 228. 



Synonym, Myzorhynchus minutus (Theobald). 



This is a dark brown mosquito with thick palpi and rather 

 light wings, somewhat resembling A. barbirostris. 



Palpi with four light bands. The tips of the palpi are white, 

 then come a few dark scales, then again another light-scaled band. 

 The remaining two light bands occur at the joints between the 

 fourth and third, and third and second, segments of each palp. 

 There are also some light scales mingled with the dark scales on 

 the second segments of the palpi. 



The proboscis is covered with dark scales except at its tip which 

 is of a yellowish white colour. 



The head is covered with black and white upright scales, the 

 former predominating on the nape, the latter on the occiput. There 

 is a well-marked frontal tuft of white hairs. 



The dorsal surface of the meso-thorax is covered with light 

 brown and white scales and hairs. 



The abdomen is covered with light brown hairs, and there are 

 a few scales on its posterior extremity. 



The veins of the wings are covered with broad spindle-shaped 

 scales, not so broad, however, as those found on A. barbirostris. 



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