INDEX. 



639 



539 ; fumigation with, 43, 44, 65, 

 177, 215, 241, 255, 267, 268, 269, 

 270, 272, 275, 284, 313, 331, 341, 

 342, 365, 380, 423, 425, 427, 428, 

 451, 474, 486, 522, 539; fumi- 

 gation with liquid form of, 29, 

 89, 230 ; physical and chemical 

 properties of liquid form of, 

 89-91 ; notice of instrument for 

 determining exact strength of, in 

 fumigation experiments, 428. 



Hydroecia (see Gortyna). 

 Hydrometer, for testing liquid 

 hydrocyanic acid, 90. 



Hylastes ater (Black Pine Beetle), 

 measures against, in Britain, 

 379 ; on Pinus pinea in Italy, 

 216 ; in forests in Lithuania, 420. 



Hylastes cunicnlarius (Black Spruce 

 Bark-beetle), in forests in Britain, 

 379. 



Hylastes opacus, in forests in Britain. 

 378 ; in forests in Lithuania, 420, 



Hylastes palliatiis (Brown Pine 

 Beetle), in Britain, 379 ; in 

 forests in Lithuania, 420. 



Hylastinoides, new subgenus of 

 Hylastiniis, 10 ; synonym of 

 Alniphagiis, 56. 



Hylastinus alni, sp. n., in Alnits 

 in Siberia, 10. 



Hylastinus obscurus, bionomics and 

 control of, on clover in Washing- 

 ton, 345. 



Hyleinyia, key to males of, 533. 



Hylemyia antiqua (Onion Fly, Onion 

 Maggot), in Austria, 261 ; in 

 Britain, 351 ; measures against, 

 in Canada, 2, 323, 362 ; on onions 

 in Italy, 142 ; measures against 

 in U.S.A., 75, 168, 188. 



Hyleynyia brassicae (see Phorbia). 



Hylemyia cilicrura (see Phorbia). 



Hylemyia coarctata (^^'heat Bulb 

 Fly), bionomics of, in Britain, 

 155, 351, 514 ; bionomics of, in 

 Germany, 253, 266, 269. 



Hylemyia fusciceps (see Phorbia) . 



Hylemyia sepia, in North America, 

 530. 



Hylemyia strigosa, chemotropic 

 respon.se of, 327. 



Hylemyia uniseriata, in Xorth 

 America, 533. 



Hylesimis crenatus, in ash in Lithu- 

 ania, 421 ; in ash in Russia, 106. 



Hylesimis eos, sp. n., food-plants of, 

 in Siberia, 10. 



Hylesinus fraxini, bionomics of, in 

 forests in Bohemia, 324 ; in ash 

 in Lithuania, 421 ; in asli in 

 Riissia, 106. 



Hylesimis oleiperda, on imported 

 varieties of olive in Palestine 

 508 ; in Russia, 106. 



Hylesinus piniperda (see Myelo- 

 philiis). 



Hylesinus pseudomori, on Pseudo- 

 moms brnnnoniana in Queensland, 

 156. 



Hylobius, spruce and pine not 

 injured by, in Lithuania, 420. 



Hylobius abietis, bionomics and 

 control of, in forests in Britain, 

 378, 380 ; Syrphid larva in mines 

 of, in Germanv, 406 ; in pine in 

 Italy, 142. 



Hylophila prasinana, on oak in 

 Russia, 105. 



Hvlotorna rosae, on roses in Russia, 

 ^106. 



Hvlotriipes bajulus, damaging lead, 

 81. 



Hylurgops palliatv.s (see Hylastes). 



Hyliirgus piniperda (see Myelo- 

 philits). 



hyoscyami, Pegomyia. 



Hypera nigrirostris, parasites of, in 

 North America, 223. 



Hvpera postica (see H. variabilis). 



Hypera punctata (Clover Leaf 

 Weevil), infested with Empusa 

 sphaerosperma in New York, 303. 



Hypera variabilis (Alfalfa Weevil), 

 intercepted in lucerne hay in 

 California, 388 ; legislation 



against introduction of, into 

 Canada from U.S.A., 416; bio- 

 nomics and control of, in U.S.A., 

 12, 94, 128, 186, 223, 396. 



Hyperaspis, natural enemy of Aphis 

 gossypii in Porto Rico, 303. 



Hyperaspis binotata, attacking scale- 

 insects in North America, 123. 



Hyperaspis canipestris, bionomics of, 

 in Italy, 123. 



Hyperaspis lateralis, natural enemy 

 of Pseudococcus citri in California, 

 318. 



Hyperdasys, Sclerodermus associated 

 with, in Hawaii, 436. 



Hyperdiplosis, Cecidomyella distinct 

 from, 160. 



Hyphantria cunea (Fall Webworm), 

 bionomics of, in Canada, 2, 147, 

 148 ; on shade-trees in U.S.A., 

 247. 



Hyphantria textor, experiments with 

 Sorosporella uvella and, 170. 



Hypoaspis, a minor pest of sugar- 

 cane in U.S.A., 79. 



hypobori, Trichopria (Cephalonomia). 



Hypoborus ficus, parasitised by Tri- 

 chopria hypobori in France, 260. 



