074 



INDEX. 



Pemphigus betae (American Beet 

 Aphis), control of, in Montana, 

 141 ; S))i II rithnrodes betae distinct 

 from, 443. 



Pemphigus dorocola, sp. n., forming 

 galls on Populus balsam if era in 

 Japan, 111. 



Pemphigus niisimae, sp. n., forming- 

 galls on Populus balsamifera in 

 Japan, 111. 



Pemphigus populi-irans versus, bio- 

 nomics of, in U.S.A., 42. 



penitalis, Panzeria ; Pyrausta. 



Pennisetia hylaeiformis ( Raspberry 

 Root Borer), on blackberries and 

 ra^ipberries in Denmark, 448 ; 

 bionomics of, in Sweden, 351. 



Pennsylvania, brown-tail and gipsy 

 moths intercepted in, 207 ; mis- 

 cellaneous pests in, 224, 354, 374, 

 375, 470, 543 ; precautions 

 against introduction of Pyrausta 

 nubilalis into, 189, 374, 507 ; 

 pests from, intercepted in Cali- 

 fornia, 62, 199, 361, 427, 504; 

 scale-insects from, intercepted in 

 Hawaii, 33. 



pennsylranica, Gasnonia ; Epicauta; 

 Photuris. 



pennsylvayiicus, Camponotus ; Chau- 

 liognathus ; Gryllus ; Harpalus. 



pentagona, Aulacaspis (Diaspis). 



Pentarthron niinutum> (see Tricho- 

 gramma). 



Pentatoma j^Zeftem, parasitised by 

 Pentatomojihaga bicincta in Java, 

 233. 



Pentatoma sayi (see Chlorochroa). 



Pentatomophaga bicincta, gen. et sp. 

 n., parasite of Pentatoma jilebeia 

 in Java, 233. 



Pentilia insidiosa, predaceous on 

 Coccids in Br. Guiana, 484. 



Pentodon australe (Undergroimd 

 Maize Beetle), in New South 

 Wales, 85. 



Peony, Lygus pratensis on, in Nova 

 Scotia, 179. 



Pepper, Chrysomphalus corticosus 

 on, in S. Africa, 242; pests of, 

 in India, 402, 543 ; litle injured 

 by Elasmognathus g^eeni in Dutch 

 E. Indies in 1918, 389; Pyrausta 

 nubilalis on, in U.S.A., 189. 



Pepper Tree, Monolepta rosae on, in 

 New South Wales, 294. 



peramata, Heza. 



perditrix, Abbella {Ittys). 



peregrina, Pauridia ; Schistocerca. 



Peregrinus maidis (Corn Leaf- 

 hopper), control of, on maize in 

 Florida, 418; bionomics of, on 

 maize in Hawaii, 285, 328, 329; 



on maize in Jamaica, 502 ; new 



parasite of, in Philippines, 435 ; 



on maize in Porto Rico, 248. 

 peregrinus, Atmetonychus ; Zelus. 

 perforans, Xyleborus ; Xylotrechus. 

 Perga dorsalis, on Eucalyptus in 



Australia, 294. 

 pergandei, Parlatoria. 

 per icar plus, Rhinonchus. 

 Peridermium pini-corticola, Dioryc- 



tria associated with, on pines in 



Spain, 90. 

 Peridroma margaritosa (see Lyco- 



photia). 

 Per Ham pus batavus, sp. n., parasite 



of Bhyacionia buolianain Holland 



234. 

 Perilitus eleodis, parasite of Eleodes 



opaea in Kansas, 282. 

 Perillus, predaceous on Leptinotarsa 



decemlineata in Canada, 43. 

 Perillus bioculatus, predaceous on 



Diabrotica vittata in U.S.A., 521. 

 Periodical Cicada (see Tibicen sep- 



temdecim). 

 Periplaneta americana (Common 



Cockroach), measures against, in 



India, 135. 

 Perisierola emigrata, hosts of, in 



Hawaii, 435. 

 Perissocentrus argentinae var. caridei, 



introduction of, into Argentina 



against Oeceticus platensis, 363. 

 Perissoderes ruficollis, on vanilla in 



Madagascar, 192. 

 Perissothrips parviceps, gen. et sp. 



n., on Ailanthus excelsa in India, 



262. 

 Perissus mutabilis, in Shorea robusta 



in India, 292. 

 PerkinsieUa saccharicida (Sugar-cane 



Leaf-hopper), bionomics and 



control of, in Hawaii, 264, 313, 



329, 330, 398, 412, 436. 

 pern iciosi, Prospaltella. 

 pernic'iosus, Aspidiotus (Aonidiella). 

 Pernicious Scale (see Aspidiotus 



perniciosiis). 

 per plexus, Liodontomerus. 

 perpusillus, Ormenis. 

 Perrisia affinis, forming galls on 



violets in France, 426. 

 Perrisia asperulae, parasitised by 



Torymus exilis in France, 426. 

 Perrisia leguminicola (Clover Seed 



Midge), in Canada, 26 ; measures 



against, in U.S.A., 4. 

 Perrisia pyri, in orchards in Den- 

 mark, 448 ; on pear in Italy, 157 ; 



on pear in Norway, 540. 

 persa, Paradrymadusa. 

 Per sea (Avocado), bionomics of 



Stenoma catenifer on, in Ecuador 



and Guatemala, 382. 



