INDEX 



Parasite, definition, 42 



Parasitic: ants, 158-68; humble bees, 

 see Psithyrus; termites, absence of, 

 168; wasps, 152-4 



Pardi, 60, 62 



Path-finding: see Way-finding 



Pelopaeus: see Sceliphron 



Pheidole: megacephala, 121; determina- 

 tion of castes, 14 1-2; soldiers, 140 



Philanthus: hunting, 27; nest-finding, 

 29 



Planta, von, 107 



Plath, 87, 88,95, 155 



Polarised light: sensitivity of ants to, 

 149; of the honey bee to, 117 



Polistes, 59; abortion of brood, 61; 

 behaviour in different climates, 

 61-2; economics of swarming, 63-4; 

 hibernation in S. America, 63; 

 parasitic species, 152-4 



Pollen: stored by honey bee, no; 

 stored by humble bees, 88 



Polybia rejecta, 69 



Polybia wasps, 65; egg production, 71; 

 food, 70; nests, 67; relations with 

 ants, 67-9; size of colonies, 69-70 



Polyergus (Amazon ant), 161-2 



Polymorphism in ants, 140 



Polyrhachis, 128 



Ponerine ants, 124 



Progressive provisioning, 44 



Propolis, no 



Prorhinotermes, 183 



Protozoa in gut of termites, 176 



Pseudacanthotermes, 173 



Psithyrus (cuckoo humble bee), 154-7 



Pupa, definition of, 24 



Queen cells: in honey bees, 104; in 



wasps, 52 

 Queens: see Castes, Halictus, Honey 



bee, Humble bee, Termites, Wasps 



R 



Red Admiral, 25 

 Red ant: see Myrmica 

 Red clover, 93-5 

 Repletes, 129 



Reproduction, 23; control of, 192-7; 



disruptive effect of, 194 

 Respiration, 17 

 Ribbands, 109 

 Rigidity of behaviour in insects, 32, 



207 

 Rosch, in 

 Rove beetle, 35 

 Royal jelly, 107, 112 



Sand wasps, 43 



Sceliphron, failure of instinct, 32; nest, 



43 



Scent: produced by honey bees, 108; 

 trails in ants, 148-9 



Schnierla, 127 



Scoliid wasps, 43 



Sex determination, 38, 101, 180 



Sex mosaics, 144 



Shapley, 20 



Sladen, 92, 155 



Slave-making ants, 159 



Small ermine moth, 33 



Smell, sense of, 18 



Social behaviour: definition, 37; de- 

 pendence of on structure and phy- 

 siology in insects, 201; difficulties of, 

 65, 191; as family life, 203-9; origin 

 of, 200-3; types of, 33 



Social hormones, 184 



Social insects, number of kinds of, 



38 

 Soldiers: in ants, 119; in harvesting 



ants, 132; in Pheidole, 140; in ter- 

 mites, 1 80 



Solenopsis, 158 



Solitary wasps, 42 



Speed of walking in ants, 20 



Spider-hunting wasps, 43 



Sting: of ants, 122-3; °f humble bee, 

 83; of wasps, 50 



Stingless bees, 96 



Stockhert, 81 



Strongylognathus, 164-5 



Structure of insects, 16 



Substitute sexual forms, 182 



Sundias, 209 



Supersedure, 108 



Swarming: in honey bee, 108; in wasps, 

 63,66 



Swift moth, 33 



218 



