570 



INDEX 



lor venustus, 363; hosts of tsetse 

 flies, 490, 498. 



WILLIAMS, ANNA, 144, 194. 



Wohlfartia magnified, 521-522. 



Woodrats, host of Triatoma protracta, 

 112. 



Woodtick, see Dermacentor. 



WORCESTER, D. C., 320. 



Worms, 196-206; classification, 196; 

 flatworms 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 macrocarpwn, mites on 



leaves of, 341. 

 Xenopsylla cheopis, identification, 



408; and plague, 411, 412; 



intermediate host of Hymeno- 



lepis, 414; distinguished from 



Pvlex irritans, 415; habits, etc., 

 417. 



X-ray, for ulcerating granuloma, 73; 

 for Schistosoma infections, 215. 



YAKIMOFF, 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; para- 

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

 bution, 182-183; course of, 184- 

 185; treatment and prevention, 

 185; transmitting mosquito, 443- 

 448. 



Yellow fever group of parasites, 169, 

 182. 



Yellow fever mosquito, see Aedes 

 calopus. 



YERSIN, A., 411. 



Yokagawa yokagawa, 228. 



YORKE, W., 100, 494, 496. 



YOSHIDA, 222, 223. 



Yquitos, reduction of yellow fever, 

 185. 



Zambezi, danger of spread of Glossina 



palpalis to, 498. 

 Zebu, possible intermediate host of 



Tcenia africana, 245. 

 ZENKER, F. A. VON, 7. 

 ZEPEDA, P., 452. 



