136 



ENTOMOLOGICAL SOCIETY. 



1920 



PAGE 



Hopkins' bioclimatic law 43 



Hydrated lime in control of pear 



psylla 36 



Hylemyia antiqua 100 



Hyphantria cunea 98 



Hypoderma bovis 103 



" lineata 103 



Insects, ancestry of 105 



Insects for the year, reports on ... 13, 83 



Insect outbreaks and their causes . . 31 



Iphiclides ajax 14 



Itonida tecomiae 104 



Japanese beetle 41 



June beetles 81. 83 



Lachnosterna dubia 82 



fusca 82 



rugosa 82 



Leaf-beetle, three-lined 102 



Leaf-bug, mullein 96 



Leaf-hopper, grape 99 



" potato 84 



" rose 98 



Leaf-miner, blackberry 100 



" unspotted tentiform . . 98 



Leaf-mite, silver 98 



Leaf-roller, strawberry 100 



Lema trilineata 102 



Leptinotarsa decemlineata 101 



Lepyronia quadrangularis 24 



Life zones, Merriam's 44 



Lime-sulphur, in control of pear 



psylla 44 



Locusts in Manitoba 49 



Locusts of British Columbia 53 



Lygus pratensis 102 



Macrodactylus subspinosus 97 



Macrosiphum pisi 101 



Malacosoma erosa 18 



" pluvialis 18 



Mayetiola destructor 103 



Meal insects, influence of chlor- 



opicrin on 21 



Mediterranean flour moth 77 



Melanoplus atlanis 17, 49, 60 



bivittatus 52, 61 



" cinereus 61 



" femur-rubrum 17, 60 



" gladstoni 52 



" minor 52 



" packardii 52, 60 



" spretis 49 



Mestobregma kiowa 58 



Metallus bethunei .' 100 



Meteorus 32 



Mill-infesting pests in Canada 77 



Myriopoda, relation to insects of . . 98 



Onion maggot 15, 17, 100 



Onion thrips 102 



Ormenis pruinosa 99 



Ornix geminatella 98 



Orphulella pelidna 55 



Otiorhynchus ovatus 17, 84 



Oyster shell scale 31 



PAGE 



Parthenogenesis in Otiorhynchus . . 96 



Peach twig borer 16 



Pear psylla, control of 33 



Pear slug 97 



Pear thrips 99 



Pieris protodico 13 



'■ rapae I'i, 100 



Phenology 44 



Phlegethonrius quinquemaculatus . . 101 



Phorbia bra,ssicae 61, 68 



Phyllocoptes schlechtendali 98 



Phymatodes dimidiatus 14 



Phytonomus punctatus 102 



Plant Quarantine Act 3? 



Plum curculio 15, 98 



Plutella maculipennis 101 



Potato beetle 84, 101 



Potato flea-beetle 84 



Potato leaf-hopper 84 



Psenocerus supernotatus 15 



Pseudopomala brachyptera 55 



Psylla, pear, control of 33 



Pteronus ribesii 100 



Raspberry sawfly 100 



Rose chafer 97 



Rose midge 104 



Saperda obliqua 14 



" puncticollis 14 



Scale, San Jose 97 



Sesia tipuliformis lOO 



Sidemia devastatrix lOS 



Spharagemon aequale ; 58 



Spruce budworm 32 



Spruce gall-louse 10" 



Stink-bug, black 10^ 



Stirapleura decussata 5i^ 



Strawberry leaf-roller lOt 



root-borer lO'' 



" root-louse 10' 



weevil 17. 84, 8^ 



Superheating in control of mill- 

 infesting insects "^8 



Systena frontalis 101 



Taeniothrips inconsequens 9S 



Tarnished plant-bug 102 



Tent, caterpillar, forest 31 



Tent caterpillars 31 



Thrips tabaci 102 



Tobacco and lime in control of cab- 

 bage root maggot 72 



Tomato or tobacco worm 101 



Tomato sphinx 1^ 



Tribolium spp JJ 



Trimerotropis caeruleipes oO 



" vinculata 60 



Trumpet vine midge 104 



Tussock moth ^° 



Typophorus canellus 100 



Vanessa atalanta 13 



" cardui 13 



Varichaeta ^3 



Vegetables, insects affecting lo 



Warble flies JJ^ 



Wheat, crambid attacking 10^ 



