700 



INDEX. 



Phytelepluis macrocarpa (Vegetable 

 Ivory Nut), Brucliid infesting, 

 in S. America, 356. 



Phyto melanocephala, parasitising 

 terrestrial Isopods in Britain, 

 35. 



Phytodecta viminalis, on basket 

 willows in Sweden, 147. 



PJiytodi actus capuae, parasite of 

 Homona coffearia in Ceylon, 540. 



Phytoecia cylindrica, bionomics of, 

 in Sweden, 94. 



Phytomeira, parasitised by Tricho- 

 gramma minutum in Sumatra, 

 271. 



Phytometra biloba, percentage of 

 males of, taken at light-traps 

 in U.S.A., 487. 



Phytometra brassicae (Cabbage 

 Looper), on cabbages in Qiiebec, 

 61 ; bionomics and control of, 

 in U.S.A., 371, 373. 



Phytometra californica (Alfalfa 

 Looper), natural enemies of, in 

 N. America, 210; not attacking 

 maize in Br. Columbia, 24. 



Phytometra eriosoma, food-plants and 

 natural enemies of, in Philippines, 

 379, 380. 



Phytometra simplex, percentage of 

 males of, taken at light-traps in 

 U.S.A., 487. 



Phytomyza, infesting maize in Fiji, 

 475. 



Phytomyza offinis, on chrysanthe- 

 mum in Sweden, 150. 



Phytomyza chrysanthemi (Chrysan- 

 themum Leaf-miner), in U.S.A., 

 556. 



Phytomyza genictilaia, on chrysan- 

 themum in Sweden, 150. 



Phytonomus (see Hyper a). 



Phytonomus posticus (see Hyper a 

 variabilis). 



Phytophaga destructor (see Maye- 

 tiola). 



phytophaga, Prodecatoma. 



Phytophthora, spraying experiments 

 against, on cacao in West Indies, 

 152. 



Phyto j)tus (see Eriophyes). 



Picea, bark -beetles infesting, in 

 N. America, 265, 266, 267 ; (see 

 Fir and Spruce). 



Picea alba, bionomics of Chermes on, 

 in Britain, 155. 



Picea engelmanni, bark -beetles in- 

 festing, in N. America, 264, 265. 



Picea excelsa, pests of, in Britain, 

 155, 158 ; Argyresthia on, in 

 Germany, 479 ; Chermes abietis 

 forming galls on, in Switzerland, 

 368. 



Picea morinda, bionomics of Chermes 

 on, in Britain, 155. 



Picea nigra, 155. 



Picea orientalis, bionomics of 

 Chermes on, in Britain, 155. 



Picea parry ana (Blue Spruce), Bup- 

 restis atirulenta mining in, in 

 U.S.A., 422. 



Picea ptmgens argentea, Cydia pac- 

 tolana on, in Switzerland, 368. 



Picea sitchensis (Sitka Spruce), 

 pests of, in N. America, 263, 

 422, 522 ; bionomics of Chermes 

 on, in Britain, 155 ; compara- 

 tively immune to Aphids in 

 Britain, 258. 



piceae, Chermes (Dreyfusia) ; Lach- 

 nus ; 3Iegastigmus. 



piceaperda, Dendroctonus. 



piceum, Alissonotum. 



piceus, Attagenus. 



picipes, Otiorrhynchus (see O. singu- 

 laris) ; Bhabdopterus. 



picirostris, Tychius. 



picta, Bagrada ; Cer arnica (Mames- 

 tra) ; Phthia. 



pictus, Cvrrospilus. 



pieria, Gomocritis. 



Pieris, organised campaign against, 

 in Switzerland, 414. 



Pieris brassicae, (White Cabbage 

 Butterfly), bionomics and con- 

 trol of, in Britain, 238, 509 ; 

 bionomics and control of, in 

 France, 74, 142, 177, 190, 319, 

 429, 461 ; on cabbages in Italy, 

 143; on cabbages in Norway, 

 284 ; on vegetables in Spain, 55 ; 

 in Sweden, 148 ; new Micros- 

 poridian parasites of, 177, 

 190. 



Pieris napi, on onions, measures 

 against, in Britain, 509. 



Pieris rapae (Cabbage Butterfly), 

 on cabbages in Quebec, 60 ; on 

 cabbages and turnips in Sweden, 

 148; bionomics and control of, 

 in U.S.A., 48, 201, 371, 373. 



pierreti, Psammodes. 



Piezodorus guildingi, a supposed 

 cotton pest in St. Vincent, 251. 



Piezosternum calidum, on cacao in 

 Belgian Congo, 80. 



Pig Weed (see Amarantus). 



Pigeon Pea (see Cajanus indicus). 



Pigs, utilisation of, to destroy 

 noxious insects, 227, 229, 240, 

 255, 267, 268, 297, 468, 484; 

 insect-infested fruit as food for, 

 296. 



pilidens, Pityogenes. 



pilipyga, Phorbia (Chortophila). 



pilleriana, Sparganothis. 



Pillot Apparatus, use of, against 

 Cnethocampa processionea, 170. 



Pilocrocis cubanalis (see P. ty-ipunc- 

 tata). 



