xvi - CONTENTS. 



Page 



'2. Inxccts which attend their young when hatched - -# - 237 — 321 



Mason Wasp ..... 238 



Saw Fly .... - - 238 



Wood-boring Beetle - - - - - 238 



Field Bug - - - - - - 238 



Earwigs .... - - 239 



Spiders ...--. 239 



Ants . - . - - . 241 



Wasps ------ 245 



]kes ...... 247 



Humble Bees - - - - - 248 



Termites ----- - 249 



LETTER XIL 



Food of Insects ------ 251 — 261 



Insects which feed on vegetables - - - - 251 



animals - - . - 252 



both vegetables and animals - - 253 



Time of feeding . . . - - 256 



Instruments of nutrition . - . . - 257 



Proportion of food consumed .... 258 



Power of abstinence .... - 259 



LETTER XIII. 



Food of Insects — continued ----- 262 — 279 



Stratagems anployr.d in procuring it - - - - 262 — 279 



Threads of Spiders ----- 262 



Webs of House Spiders, &c. - - - - 265 



Nets of Geometric Spiders - . . . 266 



Renewal of Geometric nets .... 272 



Other Spiders' webs ----- 273 



Spiders which do not form webs or nets - - . 274 



Diving Spider ... - - 275 



Ant Lion ------ 276 



L'^ptis Vermilco ----- 279 



LETTER XI Y. 



Habitations of Insects ----- 280 — 303 



1. Of solitary insects forming them for their young - -280 — 292 



Clothier Bees ----- 282 



(Jarpenter Bees ----- 282 



Mason Bees _ . . - - 283 



Upholsterer Bees ----- 265 



Leaf-cutting Bees ----- 285 



Mason Wasp - - - - - 287 



Leaf-rolling Weevils ----- 288 



Gall Flies ------ 289 



2. Of solitary insects forming them for their own use - - 292 — 303 



In the interior of leaves - . - - 293 



Of leaves cut off and rolled up - - - - 293 



Silk ------ 295 



Lichen, Stone, &c. - - - - 296 



Grass, Bark, he. (rsychr) ... - 297 



Gnmmy cx^mcnt {Clythra) . - - - 297 



Wax (Galhria) ----- 298 



Wool or Hair (Caterpillars of Clothes moths) - - 298 



Cotton - - - - - - 299 



