i8o 
remains to be shewn that Anophelinae , thus introduced, 
ever effect a permanent habitation, even when the 
removal by this means is from one portion of the 
tropics to another. 
2. Locally, streams and canals may carry larvae 
and ova long distances, perhaps miles. 
3. Winds .—The maximum distance that the 
Anophelinae can be carried in this way is quite un¬ 
certain. Nearly all of the excessive distances that 
have been given as possible flights refer to Culicinae. 
It appears certain, moreover, that the Anophelinae 
dislike wind and seek shelter from it. 
4. Trees , Plantations , ‘ Bush’ Jungle. —These 
elements undoubtedly hinder the flight of Anophelines , 
and, on the contrary, open spaces promote their 
diffusion. It is necessary to bear this fact in mind, 
where a belt of jungle screens off a source of Ano¬ 
phelines (larvae), which may find an opportunity of 
becoming infected later. 
‘Domestic’ and ‘Wild’ Anophelines 
Anophelines are mostly found in association with 
native dwellings where there is abundance of food 
(blood). Anophelines are also generally abundant 
where cattle are kept. 
Certain species are distinctly ‘ domestic ’ in their 
habits, e.g ., Mym. rossi , Pyr. costalis , Nyss. stephensi , 
and others. They are found resting in the daytime 
in the thatch of huts, and they breed close at hand 
in the nearest puddle. They may, however, fly up to 
half a mile if there are no breeding places closer. 
Other species are not peculiar to houses, but are 
also found breeding in streams and pools in the jungle 
far from habitations. Such species are Nyss. maculatus , 
Nyss. theohaldi. 
