Index 



reflex arc, 86; Fig. 58 



actions, 107 



flight, 83 

 regional patterns, in insects, 118 

 respiration, 34 

 respiratory movements, 37 

 reproduction, 48 

 retinaculum, 75 

 retinulae, 593 Fig. 36 

 rhinoceros-beetle, 114 

 robberflies, 20, iii; Figs. 50, 72 

 Robinson Light Trap, 91 

 royal jelly, 103 

 running, 74 



saliva, 46 

 Saltatoria, 10 

 sawflies, 21; Fig. 57 



larvae of, 119 

 scale insects, 16 

 Scarabaeidae, 55 

 scarabaeiform larvae, 55; Fig. 33 

 sclerites, i 

 scorpionflies, 19, 81 

 scorpions, 3 

 seaweed flies, 71, 120 

 secondary sexual characters, 115 

 secondary structures, 26 

 segments, i, 29; Fig. 15 

 sensory hairs, 62; Fig. 38 

 shellac, 16 

 shrimps, 3 

 sight, 58 



silk-moth. Fig. 37 

 silk, spinning by insects, 20, 29 

 silkworm, 130 

 silverfish, 4, 9 



siphon, of aquatic insects, 38, 76, 115 

 Siphonaptera, 21; Figs. 17, 55, 56 

 Siricidae, 22 

 size of insects, 33 

 skaters, 16, 25, 76; Fig. 19 

 slaves of ants, 107 

 sleeping sickness, 128 

 sleepy sickness, 128 

 smell, sense of, 68, 69; Fig. 42 

 snakeflies, 16 

 soaring flight, 84 

 social Hymenoptera, 100 

 social insects, 14, 22, 95 

 solitary bees and wasps, 22j Figs. 60, 6 



solitary phase of locusts, 89 



speed of flight, 84 



spermatheca, 48 



Sphecidae, 100 



spiders, 3 



spinners, 13 



spiracle, 35; Figs. 15, 17 



spittlebugs, 16 



spread of insects by wind, 85 



Spring Cankerworm, 20 



spring-tails, 9 



jumping of, 75 

 stadium, 53 

 stag-beetles, 114 

 stemmata, 62 

 sternum, 29 

 stigma, 35 



stick-insects, 10, 112 

 stings, 22, 51 

 stink bugs. Fig. 10 

 Stomoxys ochrosoma, 87 

 stone-flies, 12; Fig. 3 

 stored produce, damage to, 125 

 Strepsiptera, 25 

 stridulation, 12, 65 

 structure of insects, 26 

 Sty lops, 25 

 subimago, 13 

 sucking lice, 15 

 sucking mouthparts, 116 

 sutures, 26 

 swarming, 89 

 swarms of bees, 104 

 swimming, 76 

 Symphyla, 4 

 Symphyta, 21 



taenidia, 35 

 Tardigrada, 3 

 tarsus, 29; Fig. 14 

 taste, 68, 71 

 tergum, 29 

 termitaria, 14, 97 

 termite, queen, 98; Fig. 9 

 termites, 14, 97; Fig. 7 

 Therioaphis maculatay 120 

 thorax 3, 26, 27 

 thrips, 15, 122 

 Thysanoptera, 15, 122 

 Thysanura, 9 

 I tibia, 29; Fig. 14 



138 



