706 



INDEX. 



PorcelUo scdber, parasitised by 

 Phyto melanocephala in Britain, 

 35. 

 porcellus, Euscepes. 

 Poropoea defilippii, parasite of Bye- 



tiscus hetulae in Europe, 172. 

 Porricondyla gossypii (Red Maggot), 

 on cotton in Barbados, 394. 



porteri, Anagrus. 



porterina, Chrysopa. 



Porthesia similis (see Arctornis 



chrysorrhoea). 

 Portliesia taiwania, on mulberry in 

 Formosa, 175. 



Porthetria dispar (see Lymantria). 



portoricensis, Lachnosterna. 

 Porto Rico, pests of coiiee in, 

 103-105 ; mango pests in, 392 ; 

 miscellaneous insect pests in, 

 58, 82, 130, 254, 390, 393, 484, 

 485-487 ; experiments in con- 

 trolling Laclinosterna in, 377 ; 

 list of insects infested with Metarr- 

 Mzium anisopliae in, 378 ; Metarr- 

 hizium anisopliae introduced into 

 Hawaii from, 378; pests inter- 

 cepted in quarantine in, 485 ; 

 varieties of lime free from mag- 

 nesia in, 378. 



Portugal, Lonchaea aristella in, 76. 



posita, Ischnura. 



postica, Orgyia ; Tomas'pis. 



posticata, DasylUs. 



postimis, Phytonomus (see Hyper a 

 variabilis). 



postscutellaris, CJirysis. 



postvittana, Tortrix. 



Potash, manuring with, ineffective 

 against cutworms, 445 ; as a 

 soil dressing against Tylenehus 

 devastatrix, 135 ; scarcity of, in 

 commercial soaps, affecting effi- 

 cacy of oil emulsions, 487. 



Potassium Carbonate, in formula 

 for spray against Eriosoma larti- 

 gerum, 412, 471 ; in sprays 

 against red spider, 547. 



Potassium Chloride, manuring with, 

 ineffective against cutworms, 

 445. 



Potassium Cyanide, in preparation 

 of hydrooyanic-acid gas, 118, 157, 

 181, 401 ; for destroying ants, 

 140, 142 ; effect of, on trees, 

 433 ; (see Hydrocyanic Acid). 



Potassium lodate, determination of 

 arsenic in insecticides and fungi- 

 cides with, 440. 



Potassium Permanganate, useless 

 against vine- moths, 73. 



Potassium Salts, addition of fungi- 

 cides containing, to nicotine- 

 paraffin emulsion, 239. 



Potassium Sulphide (Liver of Sul- 

 phur), experiments in spraying 



apples with, 162 ; addition of, 

 to paraffin emulsion against Eyal- 

 opterus arundinis, 160; spraying 

 with, against Tetranychus telarius 

 449 ; increasing value of arseni- 

 cals, 362. 

 Potassium Sulpho-carbonate, ex- 

 periments with, against vine- 

 moths, 73. 

 Potato (Solanum tuberosum), Plitho- 

 rimaea operculella on, in S. Africa, 

 360 ; pests of, in Algeria, 32 ; 

 Epicauta atomaria on, in BrazU, 

 256 ; pests of, in Britain, 118, 

 160,170,425,508,509; measures 

 against pests of, in Canada, 241, 

 255, 329, 395 ; Thrips tabaci on, 

 in Chile, 429 ; pests of, in Ger- 

 many, 5, 87, 404, 445 ; mite in- 

 festing, in Hawaii, 552 ; pests 

 of, in India, 182, 379 ; Epilachna 

 on, in Dutch E. Indies, 349 ; 

 Aphids on, in Japan, 548 ; Eelio- 

 this obsoleta on, in Nyasaland, 70 ; 

 Tenebrionid beetles on, in Rho- 

 desia, 337 ; pests of, in Sweden, 

 92, 145, 147, 148, 149; Agriotes 

 on, in Switzerland, 368 ; pests 

 of, in U.S.A., 19, 67, 230, 292, 

 340, 370, 371, 389, 417, 454, 455, 

 479, 483, 490, 493, 494, 545, 565; 

 pests intercepted on, in U.S.A., 

 29, 137, 253, 254, 294, 450, 525 ; 

 legislation restricting importa- 

 tion of, into India, 87. 

 Potato, Sweet (see Sweet Potato). 

 Potato Agar, less satisfactory for 

 artificial rearing of Drosophila 

 than banana agar, 219. 

 Potato Aphis (see Macrosiphu/m 

 solanifoUi and Bhopalosiphum 

 solani). 

 Potato Beetle, Colorado (see Lep- 



tinotarsa decemlineata). 

 Potato Flea-beetle (see Epitrix 

 cucumeris and Psylliodes affinis). 

 Potato Leaf -hopper (see Empoasca 



mali). 

 Potato Stem-borer (see Gortyna 



micacea). 

 Potato Tuber Moth {Bee Phthorimaea 



operculella). 

 Powder-post Beetle (see Lyctus 



brunneus). 

 praecocella, Argyresthia. 

 praefeciata, Xanthorhoea. 

 Praepodes, destroyed by wood- 

 peckers in Jamaica, 529. 

 praeustus, Xylonites. 

 Praon coloradensis, parasite of 

 Chaitophorusnegundinisin'U.^.A.t 

 164. 

 Praon flavinode, probably a para- 

 site of Aphis abietina in Britain, 

 276. 



