THE CAUDAL TUFTS OF MALAYAN ANOPHELINE LARVAE. 97 



ConclKsions. 



1. The larvae of certain Anophelines, particularly .1. maculatiis, A. kancari and 

 A. aitkeni, occur in streams so swift that their presence would have appeared 

 impossible. 



2. Some mechanism must be looked for which would enable larvae to maintain 

 their position in the water. 



3. A piir of the dorsal tail brushes, terminated by booklets, })rovides this mechanism ; 

 and there is a counterpart, in the case of certain pupae, in the form of a pair of hooks 

 terminating the paddles. 



The writer's acknowledgments are due to Mr. M. C. Chuen, Laboratory Assistant 

 at the Malaria Bureau, Kuala Lumpur, for the care and skill he has exercised in 

 preparing from living specimens, the drawings which illustrate this note. 



Kuala Lumpur, F.M.S. 

 Sept. 1920. 



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