46 



PLANT INDEX. 



Wormseed, Aphis gossypii feeding on, VII, 313. 

 Wormwood, dry, Sitodi-epa iianirea attacking, VII, 

 32. 



X. 



Xanthium, dipterous larva in seeds, II, 333. 

 insects affecting. III, 312. 

 Btrumarium, Gortyna nitela in. II, 375. 



Rhodobajnus 13-punctatus on, I, 198 ; IV, 

 159. 

 Syphocoryne xautlii on, ref., Ill, 312. 

 Xanthoxylum, rapilio oxynius feeding on, III, 32. 



Yam, Homalota sp. attacking, VI, 218. 

 Yucca aloifolia, fruit edible, IV, 359. 



pollination of, I, 3G8. 

 anguBtifolia, pollination of, I, 309. 



Pronuba yuccasella pollenizing, IV, 369. 



Tragidion armatum on, V, 39. 

 Anthonomus signatus on, V, 175. 

 baccata, edible, IV, 359. 



pollinated by Pronuba yuccasella, V, 304. 



Pronuba on, IV, 371. 

 brevifolia, arboreal form, IV, 360. 



Pronuba paradoxa pollenizing, I, 372. 



synthetica pollenizing, IV, 370 ; V, 304. 

 Ca^nophancs prodoxi and liost on, II, 350. 

 elata, pollinated by Pronuba yuccasella, V, 304. 

 fertilization of, IV, 74, 359. 

 filamentosa, pollination of, I, 368. 



Pronuba from capsules of, VI, 37G. 



Pronuba yuccasella on, IV, 369. 



structure of, IV, 359. 

 filifera, arboreal, IV, 360. 



Yucca filifera, Pronuba on, IV, 371. \ 



Lecanodiaspis n. sp. on, ref., V, 65. 

 Megathymus yucca; and parasite on, III, 15. . 

 nectar apparatus of, IV, 366. 

 Prodoxus larva; in all species, IV, 372. 

 Pronuba species on, I, 367; II, 382; IV, 371. 

 regal tree = Y. filifera. 

 rupicola, pollinated by Pronuba yuccasella, V, 



304. 

 Scyphophorus infesting, I, 199. 

 Yuccaborus infesting, 1, 199. 

 treculiana, sj^ecial Pronuba on, IV, 371. 

 whipplei, etc., Cfenopbanes koebelei and liosts 



reared from, II, 350. 

 whipplei, capable of certain amount of self-fer- 

 tilization, V, 302. 



description of, V, 301, 311. 



distribution of, V, 311. 



floral characteristics of, V, 302. 



insects found on, V, 301, 312. 



Pimpla notanda bred from. III, 462. 



pollination of, V, 311,312. 



Pronuba maculata pollenizing, I, 372; IV, 

 367, 370. 



Pseudococcus yucca; feeding on, VI, 40. 



Scyphophorus yuccse on, V, 35. 



Z. 



Zea mays, Diatra^a saccharalis feeding on, IV, 103. 



Toxoptera graminum feeding on, IV, 245. 

 Zamia mexicana, Diaspis lanatus on, VI, 288. 



integrifoMa, Euma;us atala on, I, 38, 39. 

 Zanthoxylum fraxinium, red spider on, VI, 269. 

 Zingiber officinale, dry, Sitodrepa panicea attacking, 

 VII, 32. 



