784 



INDEX 



Pseiidospondias microcarpa, Helio- 



thrips rubrocinctus on, in San 



Thome, 58. 

 pseudospretella, Borkhauscnia. 

 Pseudotrichonympha pristina, sp. n., 



infesting Archotermopsis wrongh- 



toni, 330. 

 Psendotsuga douglasi (see P. taxi- 

 folia). 

 Pseudotsuga taxi folia (Douglas Fir), 



Chcrmes on, in America, 376, 488, 



534 ; Chermes on, in Britain, 53, 



376, 431, 488, 534; pests of, in 



Canada, 160, 161, 321, 541 ; 



pests of, in Holland, 450; pests 



of, in U.S.A.. 43, 159. 

 psendotsugae, Callidium ; Dendroc- 



ionus. 

 psetidotsugata, Hemerocampa. 

 psi, Acronycta. 

 Psichaera, parasite of Oscinella frit 



in Britain, 534 ; subgenus of 



Eiicoila, 534. 

 psidii, Pulvinaria. 

 Psidium, Dolichodenis bidens on, in 



Dutch Guiana, 536. 

 Psidium guayava (see Guava). 

 Psidium polycarpon, Heliothrips 



rubyocincius on, in Dutch Guiana, 



195, 536. 

 Psidium pomifermn, Heliothrips 



lubrocincins on, in San Thome, 



58. 

 Psila rosae (Carrot Fly), on vege- 

 tables in Britain, 487 ; on carrots 



in Denmark, 193, 363. 

 Psiloptts mobilus, predacious on 



pear-leaf midge in New Zealand, 



595. 

 Psilura mcnacJia (see Liparis). 

 Psocus taprotanes, in Sumatra, 493. 

 Psyche assamica, on tea in India, 



446. 

 Psyche gramincUa (see P. imicolor). 

 Psyche imicolor, on vines in Switzer- 

 land, 316. 

 Psyche vitrea, on tea in Ceylon, 318. 

 Psychids, unidentilied species of, 



on coconut in Cochin China, 509. 

 Psylla, spraying superior to dusting 



against, 319. 

 Psylla isiiis, on indigo in India, 



205. 

 Psylla mali (Apple Psylla), in 



orchards in Denmark, 194, 363 ; 



in Nova Scotia, 385 ; in Russia, 



327, 328, 348, 551 ; bionomics 



of, in Sweden, 155 ; measures 



against, 155, 194, 551. 

 Psylla oleae (see Etiphyllura olivina). 

 Psylla pyri, spread of, in France, 



541 ; rare in Sweden, 156. 



Psylla pyricola (Pear Psylla), mea- 

 sures against, in Canada, 125, 

 161, 181, 353, 523, 525; not 

 recorded in Sweden, 156 ; in 

 U.S.A.. 181, 353, 523, 525. 



Psylla pyrisuga, bionomics and 

 control of, in Sweden, 155. 



Psylliodes, measures against, in 

 Germany, 94, 138 ; notice of key 

 to Palaearctic species of, 418. 



Psylliodes affinis, on medicinal plants 

 in Germany, 277. 



Psylliodes chrysocepliala, bionomics 

 and control of, in Germany, 547, 

 549, 592 ; on cabbage in Ireland, 

 152. 



Psylliodes hvoscyami, on medicinal 

 plants in Crimea, 303 ; on Hyo- 

 scyamus in Germany, 277. 



Psylliodes puncinlata (Hop Flea- 

 beetle), measures against, on beet 

 and hops in Alberta, 13. 



Psyllobora tacdata, bionomics of, in 

 California, 250. 



Psyllobora vigintimaculata, preda- 

 cious on Aphis malifoliae in 

 Virginia, 571. 



psylloptcra, Panrocephala. 



Pterandrns, 98. 



pterocaUina, Stigmatothemara. 



Pterocomma fraxini, sp. n., on 

 Fraxinus excelsior in Britain, 

 598. 



Pterocomma jacksoni, sp. n., on 

 Salix capreae in Britain. 598. 



Pterocomma popuhus, on Salix 

 capreae in Britain, 598. 



Pterocomma smiihiae, on Salix fra- 

 gilis in New York, 284. 



Pterochlorus longipes, on oak, 597. 



Pterocylon, 357. 



Pterocylon mali, predacious enemies 

 of, in U.S.A., 356. 



Ptercmahts, parasite of Copidosoma 

 in Switzerland, 227. 



Ptercmalus egrcgius, parasite of 

 Nygniia phaeorrhoea in Connecti- 

 cut, 292. 



Pteromaius gelechiae, parasite of 

 Sitotroga cerealclla in U.S.A.. 315. 



Ptercmalus ntmaticidus, parasite of 

 Lygaconcmatus erichsoni, 94. 



Pteromaius puparum, attempted 

 establishment of, against Pieris 

 rapae, in Hawaii, 397. 



Ptercmalus sieboldi, parasite of 

 Melascma popidi in Italy, 472. 



Ptercmalus variavs, suggested intro- 

 duction of, into Chile against 

 Bvuchus pisorum, 422. 



Ptercnus ribcsii (Currant Sawfly), 

 on currants and gooseberries in 



