INDEX 



467 



Cockroaches, legs and muscles, 

 51-53 *. jaw-muscles, 61-65 ; 

 flattened form, 269 ; 



parasites of, 409 ; association 

 with mankind, 424-425 



Cocoon, 108 



Coelom, 6, 154 



Coleoptera, forms of larvae, 177- 

 179 ; characters, 314 ; history 

 and relationships, 344-345. 

 See also Beetles. 



Collembola, distribution, 264-266 ; 

 cave-species, 266-267 ; sense- 

 organ, 267-268 ; of sea- 

 shore, 283-285 ; characters, 

 308, 310 ; relationships, 238 ; 

 of Spitsbergen, 381-382 



Colour, sensations, 90-91 ; adapta- 

 tion in caterpillars, 272-273 ; 

 protective, 369-371 ; warn- 

 ing, 371-374 



Compound eyes, 84-89 



Coniferous trees and Chermesidae, 



.390-391 

 Consciousness, 69-70, 96 

 Continuous variation, 353-355 

 Copris, family life, 212-213 

 Corrodentia, 311 

 Cossus, preparation for emergence, 



109 ; feeding of larva, 384 

 Cotton-feeding insects, 419-421 

 Courtship, 200-208 

 Crop, 25-27 

 Crustacea, 306-307, 348 

 Cucujidae, social life, 220-221 

 Culex, 277, 280-281, 436 

 Cultivation and insect pests, 419 

 Cuticle, 2 ; shedding of, 1 60-1 61 

 Cynipidae, 320 



Danainae, 371-372 

 Darwinian theory, 365-376 

 Death-watch beetles, 427 

 Dermaptera, 310. See also Ear- 

 wigs. 

 Descent with modification, 326 

 Diastatic ferments, 27 

 Digestion, 5, 23-32 

 Digging- wasps. See Ammophila, 



POMPILUS. 



Diplopoda, 306 



Diptera, jaws, 20-21, 23 ; ovi- 

 positor, 143 ; larvae, 180- 

 183 ; pupae, 193-194 ; birth 

 of larvae, 195 ; pupipara, 



195 ; precocious reproduc- 

 tion, 196 ; on seashore, 287- 

 292; characters, 316-317; 

 relationships, 336 ; fossils, 

 342 ; adaptation to flowers, 

 394-395 ; blood-sucking, 398, 

 411-414,429-436 



Discontinuous variation, 351-353 



Docophorus, 407 



Dolichopodidae, 281 



Donacia, aquatic adaptations, 274- 

 279 



Dorylus, 239-240 



Dragon-flies, wing muscles, 57 ; 

 pairing, 201-203 ; egg- 

 laying, 208-209 ; distribu- 

 tion, 264 ; larval respiration, 

 277 ; characters, 313 ; fossils 

 and relationships, 338-339 



Driver-ants, 239-241 



Drosophila, inheritance in, 128-130, 

 132-133. 136, 351. 355 



Dr>'ophanta scutellaris, 387 



Dyticus, 274, 277 



Ears, 78-82 



Earwigs, jaws, 17-19 ; family life, 

 2 1 0-2 1 1 ; variation, 354-355 

 Ectoderm, 152 

 Ecdysis, 11, 1 60-1 61 

 Economic study of insects, 422- 



423 

 Eggs, 10, 118-120, 151-152 

 Egyptian monuments and insects, 



439, 447 

 Embiidae, social life, 253 

 Embryo, 152-360, 359-361 

 Empis, courtship, 207-208 

 Empusa muscae, 396 

 Endoblast, 152 

 Endoderm, 155-158 

 Endopterygota, 176, 309, 314-318, 



329, 334-336, 340-345 

 Energy, transformation m body, 16, 



36-37 

 Envirormient, influence of, 272, 357, 



361-363 

 Enzymes, 27 

 Ephemeroptera, 313. 333-334- ^^^ 



also Mayflies. 

 Equilibration, 'j'j-'j^ 

 Eretmoptera, 288 

 Eruciform larvae, 186 

 Evolution, 325-379 

 Excrement, 32 



