INDEX. 



615 



dura, Chionaspis. 



dtirbanense, Lecauium. 



Durum, food-plant of Cet>hi!s cinctus 

 in U.S.A., 464. 



Dusky Cotton-stainer (see Oxy- 

 carenus laetus). 



Dust Mulch, used against Hypera 

 variabilis, 128. 



Dusting, 130, 135, 302, 384. 

 390, 504 ; compared with liquid 

 sprays, 94, 95, 207, 219, 249, 276, 

 310, 363, 462, 534. 



Dutch East Indies, coft'ee pests in, 

 406, 447-449 : bionomics and 

 control of Stephanoderes hampei 

 in, 447-449 ; miscellaneous pests 

 in. 329, 360, 453, 454, 494, 522, 

 537, 538 ; tobacco pests in, 540 ; 

 tea pests and their control in, 

 452, 453, 455, 456, 457, 510, 513 ; 

 experiments with carbolineum 

 against scale-insects in, 439 ; 

 (see Java and Sumatra). 



Dutch Guiana, cacao pests in, 232, 

 439, 440 ; miscellaneous pests in, 

 422, 536, 537 ; effect of spra\4ng 

 with carbolineum against Coccus 

 fir id is on coffee in, 439. 



duvanae, Microgaster. 



D3-eing, insect-galls used for, 2. 



dynaster, Dibyachoides. 



Dyscenis fletcheri, on apple in 

 India, 84. 



Dyscenis maUgniis, food-plants of, 

 in India, 84. 



Dyscinetiis bidentatus (Small Black 

 Hardback), on sugar-cane in 

 British Guiana, 42, 471. 



Dyscinetiis gcDiinatus (Larger Black 

 Hardback), on sugar-cane in 

 British Guiana, 42. 



Dyscinetiis tyachvpygus, on sugar- 

 cane in U.S.A., 79. 



Dysdercus (Cotton-stainers), legis- 

 lation against, in West Indies, 

 296, 442, 523 ; on cotton in 

 Queensland, 155 ; intercepted on 

 cotton seeds in Queensland, 157. 



Dysdercus albidiventris, on cotton 

 in Arizona, 10. 



Dysdercus andreae, on cotton in 

 Guadeloupe, 298 ; not a serious 

 pest of cotton in Porto Rico, 303. 



Dysdercus cingulatus (Red Cotton 

 Stainer), in India, 109, 445 ; on 

 cotton in Ceylon, 520; measures 

 against, on Hibiscus sabdariffa 

 in Straits Settlements, 283. 



Dysdercus delauneyi, bionomics and 

 control of, in St. Vincent, 205. 



Dysdercus discolor, on cotton in 

 Guadeloupe, 298. 



Dysdercus sidae, on cotton in 

 Queensland, 157. 



Dysdercus superstitiosus, on cottor 

 in West Africa, 474 ; on cacao 

 in San Thome, 492, 494. 



Dytiscidae, of Arctic Canada, 192. 



Eacles magnifica (see atheroma). 



Eantis thraso (Citrus Leaf-roller), 

 in Porto Rico, 484. 



Earias, on cotton in India, 130, 

 519. 



Earias biplaga, on cotton in West 

 Africa, 474. 



Earias fabia (Cotton Bollworm), 

 bionomics of, in India, 85, 109, 

 445 ; not very injurious to cotton 

 in Dutch East Indies in 1919, 

 329. 



Earias huegeli, on cotton in Queens- 

 land, 157. 



Earias insulana (Spiny Cotton Boll- 

 worm, Spotted Bollworm) 

 . measures against, in Cyprus, 204 

 on cotton in Egypt, 67,68, 283 

 bionomics of, in India, 85, 109 

 on cotton in Mesopotamia, 478 

 on cotton in Morocco, 121 

 on cotton in Queensland, 155 

 food-plants of, in Anglo-Egyptian 

 Sudan, 172. 



Earinus, notice of key to species of, 

 515. 



Earwigs, parasitised by Rhacodi- 

 neiira antiqua in France, 432 ; 

 predaceous on sugar-cane leaf- 

 hopper parasites in Hawaii, 20 ; 

 in houses in Vancouver, 324. 



Eastern Corn Borer (see Aparnea 

 nictitans americana). 



Eccoptogaster (see Scolyfus) . 



eccoptogastri, Rhophocerus. 



Ecdytolopha insiticiana , on shade- 

 trees in U. S. A., 247. 



echinopsidis, Pulvinaria broadwayi. 



Echinopsis latiflora, Pulvinaria 

 broadwayi var. echinopsidis on, 

 in British Guiana, 119. 



cchinopus, Rhizoglyphiis. 



Echidnophaga gallinacea, an intro- 

 duced pest in Mauritius, 499. 



Echthrodoca conflagrata, parasite of 

 Lepidoptera in Germany, 408. 



ecksteini, Platyterw.a. 



Economic Entomology, in Canada, 

 3 : in Germany, 332, 427, 429, 

 467 ; in U.S.A., 152, 244, 245, 

 396, 462 ; use of aeroplanes in. 



