Genus Myzomyia. 47 



Myzomyia rossii. Giles (1899). 

 Anopheles rossii. Giles (1899). 

 Anopheles vagus. Donitz (1903). 



Journ. Trop. Med., (Oct. 1899), Giles; Handbk. Gnats, p. 149 (1900), and 

 2nd ed., p. 311 (1902), Giles; Mono. Culicid. I. p. 154 (1901) and III., 

 p. 45 (1903), Theobald; Les Moustiq., p. 178 (1905), Blan chard ; Ind. 

 Med. Gaz. XXXVI., p. 364 (1901), Liston ; Zeitschrift f. Hygiene XLL, 

 pp. 80 and 86 (1903), and XLIIL, p. 124 (1903), (vagus) Donitz. 



Additional localities. — Deesa (Major C. G. Nurse). Abundant 

 in Ceylon (E. E. Green). It may now be said to occur commonly 

 throughout India, Ceylon, Malay, the East Indies and Philippine 

 Islands. It may occur anywhere up to 5,000 feet altitude. 



Notes on Life-history. — The eggs have a broad fringe passing 

 completely around them. 



The larvae iu the Museum show the frontal hairs simple. 

 There are six pairs of palmate organs, each consisting of seventeen 

 to eighteen plates with very long terminal processes. 



In some districts it apparently breeds all the year. 



It is fond of entering trains, boats and carriages, and is thus 

 distributed over a wide area. 



The malarial parasites will develop in it, but it has not yet 

 been found infected naturally. 



Mr. E. E. Green considers it is the malarial carrier in parts of 

 Ceylon — especially the Batticaloa district. He found the larvae 

 breeding in the brackish lake at Batticaloa town, and on the 

 coconut estates he found them breeding in small water holes 

 used for watering the young coconuts, and on some estates in 

 earthenware chatties sunk at the base of the palms. (Tropical 

 Agriculturist, p. 84, xxvii. 1906). 



Myzomyia rossii. Giles. 



var. indefinita. Ludlow.* 



Canad. Entomo., p. 299 (1904). 



This obscure insect lies between M. rossii, Giles, and M. lud- 

 lowii, Theobald, but differs in the following characters : Wing 

 venation like rossii and very constant ; palpal banding and 

 general colour like ludlowii, also constant ; femoral markings like 



* Miss Ludlow now considers this a definite species. 



