viii LIST OF ILLUSTRATIONS. 



229. Insects as Architects 295 



230. PODURA 296 



231. ErEBOM ASTER 296 



232. Case Worm 303 



233. Ant Lion and its pit 303 



234. Cave Grasshopper 304 



235. Young Seventeen -year Cicada and its nest 305 



236. Sumac Gall 3o5 



237. Cock's-comb Gall 307 



238. Attelabus 307 



239. Willow Gall 308 



240. Cabbage Willow Gall 308 



241. Manv-chambered Grape Gall 309 



242. Filbert Grape Gall 310 



243. Clothes Moth 311 



244. Basket Worm 312 



245. Chrvsis 313 



246. Driver Ant 314 



247. Ant Nest in Thorns 317 



248. Philanthus 319 



249. Nest of Ceratina 320 



250. Nest of Carpenter Bee 320 



251. Female, worker and soldier Termes 322 



252. Female CEcodoma 333 



253. Major worker CEcodoma 333 



254. Vespa maculata 342 



255. Andrf.na vicina 344 



236. Cells of Mason Bee in a gall . 345 



237. Cells of Leaf Cutter Bee 346 



258. Leaf Cutter Bee at work 347 



259. Cells of Humble Bee 34* 



260. Nervous System of Corydalus 35^ 



