INDEX 



295 



Myrctpetrct scutellaris 



longitudinal section through nest, 198 



as a honey gatherer, 198 

 Myrmecophilous, or ants'-nest beetles, 45 

 Myrmica Kirbii, 151 



NATURAL SELECTION, theory of, solves 

 principle of adaptive colouring, 205 



part played by, in association of bright 

 colour with distasteful qualities, 247 



and mimicry, 258, 262 

 Nectar of flowers, specially attractive to 



insects, 36, 62, 63 

 Nectarinia, admired globular nests of, 200 



where found, 200 



construction of nest, 200 



their flight of stairs, 201 



method of enlargement of nest, 202 



enormous cell-capacity of nest, 202 

 Need of insects of means of defence, 203 

 Nervous system, in insects, 23 



design of, constant, 23 



in vermiform larvae, 23 



modification of, for perfect insects, 24 

 Nests, wasps', principles of enlargement, 



i7S 

 Newport, on chitine, 20 



on moulting of skin, 20 

 Nurses, need of, by young of social 



hymenoptera, 47 

 Nursing bees, 48 

 Nutrition, instruments of, 58 

 Nymph, term for pupa stage, 10 



OAK especially liable to galls, 89, 91 

 Oak-apples, 91 



Occident ant of American plains, where 

 found, 140 



architecture, 140 



"clearing," reason for, 140 



path-ways absent, why, 141 



roofing of mound, entrances, 142 



interior of nest, 143 



habits different from Agriculturist, 

 140, 141, 142, 143 



Dr. McCook on, 143 

 Odynerus, 86, 267 

 lEcophylla sinaragdina, 152 

 Old world, has produced more advanced 

 forms of animal life than New, 164 



Meliponae, absence of, in, 166 

 Orchids, epiphytal, 150 

 Orthoptera, offensiveness of, 244 



mimicking coleoptera, 268 



protective resemblance in, 219 



mimicking hymenoptera, 267 



metamorphoses of, 3 

 O.smia, homes in shrubs, 81 



contrivances in snail-shells, under 

 stones, 8 1 



PAPILIOS, mimicry in African, 260 

 mimicry in South American, 259 

 mimicry in Asiatic, 260 

 as objects of mimicry, 260 

 Parasites, 37 



insect pests, and vegetables, balance 



of life between, 41 

 a protection to pur crops, 40 

 upon insects, mighty business of, 40 

 adult insects subject to, 40 

 Parasitic bees, 49, 273 

 Parasitic hymenoptera, 38, 49, 273 

 habits of, 38 ; unvarying, 39 

 condition of insects attacked by, 38 

 their power to detect victim concealed 



from sight, 39 

 their power to gauge appetites of 



young, 39 



eggs of insects attacked by, 40 

 Parasol ant, 134 



Patterns, similarity of, for warning, 250 

 Peckham, Elizabeth, on mimicry of ants 



by spiders, 269 

 Pelopaeus, 88 

 Pensile nests, of Crematogaster, 151 



of Formica elata, and Myrmica 



Kirbii, 151 



vlCEcophylla smaragdina, 152 

 Period of quiescence, the death-like, n, 33 

 Photographic sensitiveness of chrysalides, 



Meldola on, 233 

 Phytophagous insects, how kept in check, 



40 

 Pieridae, mimicking Heliconidae, 259 



females more beautiful than males, 



262 



Polistes, description of, 180 

 system of nidification, 180 

 shape of nest, variable, 181 

 nest protected by varnish, position 



&c., 1 80, 181 

 problems of economy of societies of, 



183, 184 



Polistes aterrima, 182 

 Polybia, nests of, 193 



P. palmar urn^ and seifiela, 193 



P. liliacea, 195 



P. rejecta, 196 



principle of enlargement of nests, 194, 



. J 9 6 . 



direction of cells, 196 

 communication in nests, 196 

 Possibility of enlargement in all honey- 

 feeding ants, 54 



Poulton, Mr., experiments on variable 

 protective resemblance, 233 ; deter- 

 mination of period of susceptibility, 

 234 ; of organ or part susceptible, 



2 35 

 on insects which mimic vertebrates 



271 



Power of locomotion, acquisition of, at 

 end of pupal period, 12 



