GENERAL INDEX. 



329 



Water-supply, importance of pipe-'borne, 

 258 ; danger of wells for, 258. 



Wells, danger of, 258. 



West African Culieidae, larval and pupal 

 stages of, 7 ; habits of, 51. 



West African Hemiptera injurious to 

 Cocoa, 59, 177. 



Xenopsylla hrasilietisis, 92. 

 „ cheopis, 92. 



Xysirocera glohosa, injuring Albizzia, 121, 

 136. 



Yellow fever, relation to Stegomyia fasciata, 

 '2bQ>, 261 ; infective period of Stegomyia 

 for, 239 : mild forms of, mistaken for 

 malaria, 256 ; occurrence of, in West 

 Africa, 261, 262, m>^e ; negroes immune 

 to, in Para, 263. 



Zemiostigmata, 119. 



