﻿IX, B, 5 Walker and Barber: Malaria in the Philippines 385 



projecting forward. Palpi dark brown, with two broad cream- 

 white apical bands, one of which is terminal, separated by a 

 narrow dark band, and one narrow white basal band. Probos- 

 cis dark brown with a tawny tip. Thorax light brown on the 

 back and dark brown on the sides, and covered with hairlike 

 curved scales. Wings spotted, with the light color slightly pre- 

 dominating; the front edge black, with 5 pale yellow spots and 

 a pale-yellow tip; the fringe with light spots at the end of all 

 of the veins except the sixth. Legs dark brown, with very 

 narrow light bands at the joints. Abdomen dark brown, hairy. 



The larvse of Anopheles febrifer were found very abundant 

 in shaded brooks of Laguna Province. They are found in 

 depressions of the bank or under overhanging portions of the 

 bank in the wooded streams, and especially where collections 

 of drift twigs and leaves or tufts of rootlets were projecting 

 into the water. This species also breeds in open brooks or 

 irrigation ditches, if they contain running water and there is 

 overhanging grass or other vegetation to furnish shade. As this 

 is a hitherto unknown species, there are no data on its suscepti- 

 bility to infection with, and its ability to transmit, malaria. 



Anopheles rossii was first described by Giles in 1899. It is 

 credited to the Philippines by Banks (1906) and Ludlow (1908). 

 The synonymy of this species is as follows : 



Anopheles rossii Giles, 1899. 

 Anopheles vagus Donitz, 1902. 

 Myzomyia rossii Theobald, 1903. 

 Pseudomyzomyia rossii Theobald, 1907. 

 Nyssomyzomyia rossii James and Listen, 1911. 



Anopheles ludloivii is a species nearly related to, if not a 

 variety of, Anopheles rossii. It was first discovered by Ludlow 

 in the Philippine Islands in 1903. She considered it to be a 

 new species and sent it to Theobald, who named it. The syn- 

 onymy of this species is as follows : 



Anopheles ludlowii Theobald, 1903. 

 Myzomyia ludlowii Theobald, 1903. 

 Nyssomyzomyia liidloivii James and Listen, 1911. 



The differential characters separating ludloiuii from rossii 

 are given by Theobald (1903) as follows: 



A very variable species, somewhat like rossii at first sight, but easily 

 told by the spotted (yellow) legs and much shorter fork-cells. The base 

 of the first submarginal cell is always slightly nearer the apex of the 

 wing, and the costal spots differ slightly, but are to some extent variable. 

 The cross veins are most unstable. The palpi are very similar, but the 

 apical band in rossii is rather longer. The chief difference is that in 



