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



387 



practical importance in the transmission of malaria. Liihe 

 (1906) gives the following table of comparative results of 

 dissections by different authors of Anopheles culicifacies and 

 Anopheles rossii captured in malarial houses in India : 



Table I. — Malaria parasites found in Anopheles culicifacies and Anophelea 

 rossii caught in houses in India. 



Place. 



ObBerver. 



Anopheles (Myzo- 

 ■myia) culicifacies. 



Anoplieles {Myzo- 

 myia) rossii. 



Dis- 

 sected. 



With spo- 



rozoites 



in the 



salivary 



glands. 



Dis- 

 sected. 



With spo- 



rozoites 



in the 



salivary 



glands. 



Mian Mir 



Stephens and Christophers. 

 James _ ... 





Per cent. 



324 

 496 

 364 



18 

 35 





 

 





 



Do 



259 

 69 



12-4.6 

 6-8.6 



Ennur (fishing village near 

 Madras) .» 

 Do.b... 



Stephens and Christophers. 

 James 



NearMadrasc 





25 



4-16 







" Anopheles rossii very rarely in the houses. Anopheles culicifacies incomparably less 

 frequent ; the 69 specimens are the total collection for almost a week. 

 * In one of these 18 specimens, however, oocysts were found. 

 " Both species of mosquito were collected in the same houses and under the same eonditiona. 



James (1902), however, states that he has obtained positive 

 results in experimental infections of Anopheles rossii with sim- 

 ple tertian, malignant tertian, and quartan malarial parasites. 



Schiiffner (1902) worked on the experimental transmission 

 of malaria at Deli, Sumatra, with a mosquito which he designates 

 as "Anopheles I." From his description and especially from 

 his figures of this mosquito it is very probable that it was Ano- 

 pheles rossii. Eysell (1910) is also of this opinion. Schiiffner 

 obtained undoubted infections of this species of mosquito with 

 both tertian and subtertian malaria, as the excellent figures of 

 sections of the mid-gut and salivary glands in his plates demon- 

 strate, and he was successful in transmitting the infection with 

 both types of malaria to healthy persons by bites of the experi- 

 mentally infected mosquitoes. 



Banks (1907) was the first investigator to determine experi- 

 mentally the ability of identified specimens of Anopheles ludlowii 

 to transmit malaria. He succeeded in infecting, and securing 

 development of the malarial parasites up to the sporozoite stage 

 in, mosquitoes which he found as larva in brackish water at Olon- 

 gapo, Luzon, P. I., and which he identified as Myzomyia ludlowii 

 by feeding them on the blood of a patient infected with subter- 



