400 



Index 



Natural Selection, 141-47, 326. 

 Naucorid^, 190. 

 Neck, 19, 



Nematocera, 256-8. 

 Nemestrinida;, 261. 

 Nemopteridre, 204. 

 Nephridia, 373-4. 

 Nepids, 190-1, 291, 355. 

 Nerves, 31 ; structure of, 32 ; de- 

 velopment of, 94-6. 

 Nervures of wings, 27. 

 Nests of insects, 330-340. 

 Neuration, 27; of butterflies, 151- 



155- 

 Neurilemma, 32. 

 Neuroptera, 161, 163, 202-205, 



356-60. 

 Nitiduiids, 212. 

 Noctuids, 240. 

 Nomenclature, 151. 

 Notodontids, 242. 

 Notonectids, 191, 291. 

 Notum, 21. 



Nucleolus of egg-cell, 85. 

 Nucleus, 4; of egg-cell, 84, 86; 



segmentation, 89-90. 

 Nycteribiids, 267. 

 Nymph, 103. 

 Nymphalida;, 154, 248-250, 297. 



Obtect pupa:, 11 8- 119. 



Ocelli, 40, 105. 



Odonata, 163, 199-202, 350, 355. 



Odontopera, caterpillar, 318. 



OEdemerida;, 222. 



Qisophagus, 62. 



GJstrids, 264-5. 



Oligonephria, 164. 



Opticon, 39. 



Order, 156-157. 



Orders of insects — summary, 162- 

 164; details, 165-280 ; relation- 

 ships between, 344-363. 



Origin of species, 140-149. 



Orneodidae, 237. 



Orthoptera, 157, 162, 172-176, 



348-9. 353- 

 Orthorrhapha, 255-261. 



Osmylida, 205. 



Ovaries, 73-75 ; development of, ! 



99- j 



Oviducts, 73, 75, 99. I 



Ovipositor, 76-79. I 



Ovum, 73. ;j 



Owl-moths, 240. 1 



Pad of foot, 26. \ 



Pedogenesis, 126. 



Pairing of sexes, 125, 325-8. ] 



Palseodictyoptera, 353. ■'< 



Palp, 13, 15. . 



Panorpidje, 205, 360. 



Papilionidx, 248. j 



ParaglossE, 15. I 



Pararge, 155. i 



Parasites, 307-10. : 



Parnidse, 215. 



Parthenogenesis, 88-9. i 



Patagia, 22. J 



PediculidsE, 192. 1 



Pedigree of insects, 374-82. \ 



Peduncle, 36. 



Pelophila, larva of, 103-6. ; 



Penis, 82. . 



PentatomidsE, 187. 



Pericardium, 55. 



Periopticon, 39. 



Peripatida, 373. 



Perlaria (PerlidsE), 182-3. j 



Petiolata, 272-80. 



PhalacridsE, 212. j 



Phasgonurida, 175-6. : 



Phasmida, 174-5, 353. J 



Philopterida, 179. 1 



PhloeothripidjE, 184-5. 



Phoridz, 266-7. 



Phryganeida;, 227. 



Phthanocoris, 355, '. 



Phylum, 2. i 



Phyllodromia, 173-4- See also 



Cockroach. 



Piercing-jaws, 12. i 



Pierida, 248. j 



Pigment, 287, 319. I 



Pipunculidae, 262. I 

 Plant-lice, 195-6; jaws, 12-14; ! 



