INDEX 



341 



Wasps, 24, 266, 308, 321. 

 common, 266. 

 German, 266. 

 sand, 24. 

 Weevils, 18, 25, 83, 34, 35, 42, 216, 



217. 



apple, 34. 

 biscuit, 267. 

 cotton-boll, 18, 33, 42. 



control, 50. 



damage, 43. 



distribution, 49. 



food plants, 45. 



history, 42. 



life-history, 45. 



oviposition, 47. 



rate of development, 49. 



Weevils, cotton-boll, related species, 



45. 



systematic position, 42. 

 palm, 209. 

 Wilt disease, 35. 



Xenopsylla cheopsis. see Plague Flea. 

 Xestobium tessellatum, see ' ' Death 



Watch." 



Xyleborus dispar, 36, 267. 

 perforans, 35. 



Yaws, 126. 



Zeuzera sesculi, see Wood Leopard 

 Moth. 



