INDEX. 



237 



X. 



Xanthagrion erythroneurum, preda- 

 ceous on mosquitos in Australia, 

 94. 



Xenopsylla aequisetosa, on rats in 

 the Gold Coast, 48. 



Xenopsylla astia, on rats in Ceylon, 

 150. 



Xenopsylla cheopis, intermediate 

 host of Hymenolepis spp., 14 ; 

 and plague in South Annam, 51 ; 

 on Perameles macrura in Australia 

 41 ; on Mus decumanus in 

 Britain, 179 ; on rats in Ceylon, 

 150 ; on rats in the Gold Coast, 

 48 ; on rats in Java, 65 ; on 

 rats in Panama Canal Zone, 140 ; 

 effect of temperature on, 151. 



Yaws, carried by flies, 49. 

 Yeasts, effect of, on hatching of 

 Stegomyia fasciata, 156. 



Yellow Fever, measures against, in 

 Trinidad, 17; measures against, 

 on ships, 61, 86 ; possible disap- 

 pearance of, from failure of the 

 human host, 135 ; and Stegomyia 

 fasciata, 49, 135, 152, 153. 



z. 



Zanzibar, new mosquitos from, 53 ; 



Polyplax calva on Cricetomys 



gambianus in, 69 ; bionomics of 



mosquitos in, 147. 

 Zebra, immune to rinderpest, 172. 

 Zinc Sulphate, in formula against 



mange on sheep, 116. 

 Zinc Oxide, and menthol, as a 



repellent for mosquitos, 188. 

 Zululand, relation between game 



and Glossina in, 172, 186. 

 Zyline,possibilities of, as a fumigant, 



132. 



(C456) 



