Genus Nyssorhynchus. 99 



those on the abdominal segments. They figure the larva 

 (Plate IV.). 



Nyssorhynchus fuliginosus. Giles (1900). 



Anopheles fuliginosus. Giles (1900). 



Anopheles jamesii. Liston (non Theobald) (1901). 



Anopheles leucopus. Donitz (1901). 



Gnats, p. 160 (1900), 1st ed., Giles; Mono. Culicid. I., p. 122 and II., p. 307 

 (1901), Theobald; Ind. Med. Gaz., p. 441 (1901), Liston; Insk. Borse, 

 XVIII., p. 37, 4 (1901), Donitz; Proc. Roy. Soc, Eng. LXIX., p. 370 

 (1902), Theobald; Beit. z. Kenntn. d. Anop.,p. 73 (1902), Donitz; Ind. 

 Med. Gaz. XL., Jan. (1903), Adie; Mono. Culicid. III., p. 93 (1903), 

 Theobald; Bombay N. H. Soc. Journ. XV. 2, p. 265 (1903), Manders; 

 Spolia Zeylandica, II., VIII., p. 169 (1905), Chalmers ; Ind. Med. Gaz. 

 XXXVIII., July (1905), Adie. 



Variety. — A specimen sent from Chingelput, S. India, shows 

 the following variations from the type : the black on the base of 

 the first long vein spreads underneath both basal white spots, 

 whilst it is white at the base ; the pale areas on the fifth are 

 much larger, and the apical black spot of the sixth is very long, 

 the two basal ones small. The dark lines of the thorax are very 

 pronounced, and also the white thoracic scales. 



The specimen was taken in March, I fancy by Captain James, 

 I.M.S. 



The variation in this species is somewhat marked. Major 

 Adie, I.M.S., writing to me, states that it shows marked seasonal 

 variation. He has shown that at the end of the autumn the 

 typical form is replaced by one with four white palpal bands and 

 two white hind tarsi, and that in the spring it returns to the 

 typical form. The form with four pale palpal bands and two 

 white hind tarsi occurs in the Punjab all the winter (vide Indian 

 Med. Gaz., xxxviii., July 7, 1903, and 4 Jan., 1905, Adie). 



The typical fuliginosus flourishes from the middle of March 

 to the beginning of January, the variety from about the middle 

 of November to the end of April. 



This species is found in frequent company with M. culicifacies, 

 Giles. Major Adie asks an interesting question in his valuable 

 paper. " It would be interesting to know why a fuliginosus is 

 better able to get through the winter with four white palpal 

 bands and two white hind tarsi than with the ordinary three 

 white bands and three white hind tarsi. Is it that in their 



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