570 



INDEX 



tor venustus, 363; hosts of tsetse 

 flies, 490, 498. 



Williams, Anna, 144, 194. 



Wohlfartia magnifica, 521-522. 



Woodrats, host of Triatoma protracta, 

 112. 



Woodtick, see Dermacentor. 



Worcester, D. C, 320. 



Worms, 196-205; classification, 196 

 ilatworms in general, 196-198 

 roundworms in general, 198-199 

 annelids in general, 199-200 

 parasitic habitats, 200; life 

 history and modes of infection, 

 200-201; effects of parasitism, 

 201-204; nutriment absorbed, 

 202; toxic effects, 202; infection 

 of wounds made by, 204; rela- 

 tion to appendicitis, 204; diag- 

 nosis, 201; eggs of, 205. See 

 also Intestinal worms and various 

 species. 



Wrigglers, 431. 



Wright, R. E., 306. 



Wyeomyia smithii, hibernation, 436. 



Xanthium macrocarpum, mites on 



leaves of, 341. 

 Xenopsylla cheopis, identification, 



408; and plague, 411, 412; 



intermediate host of Hymeno- 



lepis, 414; distinguished from 



Pidex irritans, US; habits,^ etc., 

 417. 

 X-ray, for ulcerating granuloma, 73; 

 for Schistosoma infections, 215. 



Yakimofp, W. L., 377. 



Yaws, 63-66; distribution, 63; spiro- 

 chsetes of, 63; course of, 63; 

 treatment, 64-65; prevention, 65. 



Yellow fever, in Panama, 2; relation 

 of mosquitoes to, 7, 443; parar 

 site of, 169, 184; 182-186; distri- 

 bution, 182-183; coittse of, 184- 

 185; treatment and prevention, 

 185; transmitting mosquito, 443- 

 448. 



Yellow fever group of parasites, 169, 

 182. 



Yellow fever mosquito, see Aides 

 calopus. 



Yersin, a., 411. 



Yokagawa yohagawa, 228. 



Yobke, W., 100, 494, 496. 



YosmDA, 222, 223. 



Yquitos, reduction of yeUow fever, 

 185. 



Zambezi, danger of spread of Glossina 



polpalis to, 498. 

 Zebu, possible intermediate host of 



Tarda africana, 245. 

 Zenker, F. A. von, 7. 

 Zepeda, p., 452. 



