300 



INDEX. 



213, 215, 233, 242, 243, 262, 263, 



269, 272, 274. [See Descriptions of 



types.] 

 Wings, origin of, 30, 31, 56, 57. 

 Woodchuck, 265. 

 Worker ant, 238. 



bee, 223. 



Worms, 12, 15, 47. 

 Wyman, 228. 



Xenos, 20. 



X. 



Young lepidopterous larva, 



Zittel, 



