﻿IX, B, 5 Walker and Barber: Malaria in the Philippines 389 



from salt or brackish water, to be the chief carrier of malaria 

 in the Andamans. The author is doubtful whether any part is 

 taken in the transmission of malaria here by the other common 

 species, Nyssomyzomyia rossii and Myzorhynchus barbirostris. 



Stanton (1913) states that a large series of dissections and 

 infection experiments, carried on by him in the Federated Malay 

 States, failed to show any development of malarial parasites in 

 Anopheles rossii. 



Anopheles barbirostris is a common Malayan species, having 

 the following synonymy: 



Anopheles barbirostris van de Wulp, 1884. 

 Myzorhynchus barbirostris Theobald, 1903. 



This species is reported in the Philippines by Banks (1906) 

 and Ludlow (1908). We have found it breeding scatteringly 

 but widely spread in Laguna Province. It was first found 

 breeding in December in a semistagnant pool, which was densely 

 shaded and contained growths of duck week, pond lilies, and algse. 

 Later it was found breeding in open rivers and brooks, asso- 

 ciated with Anopheles rossii, and to a lesser extent in shaded 

 brooks, associated with Anopheles febrifer. Larvae of this 

 species are particularly to be found in collections of driftwood 

 and dead leaves at the lower end of the semistagnant pools and 

 under overhanging vegetation along the banks of open streams. 

 The larvffi are rarely numerous and are usually found only 

 scatteringly. 



James (1902) states that he was successful in infecting and 

 securing development of oocysts and sporozoites of the malarial 

 parasite in Anopheles barbirostris. 



Schiiffner (1902) describes and illustrates as "Anopheles 11" 

 an anopheline which is apparently Anopheles barbirostris. He 

 was unsuccessful in attempts to transmit malaria with this 

 species. 



Stephens and Christophers (1906) do not include this species 

 among those known to transmit malaria. However, Luhe (1906) 

 states that Stephens and Christophers believe from the geograph- 

 ical distribution of this species that it may be a carrier of malaria. 



Stanton (1912) was unable in eight trials to infect the Malayan 

 strain of this species with the parasites of subtertian malaria. 



Anopheles sinensis is another oriental species closely related 

 to Anopheles barbirostris. Its synonymy is as follows: 



Anopheles sinensis Wiedemann, 1828. 

 Myzorhynchus sinensis Theobald, 1901. 

 Anopheles jesoensis Tsuzuki, 1902. 

 Myzorhynchus peditaeniatus Leicester, 1908. 



