INDEX TO HOSTS. 
A. 
Abies concolor, 166. 
frazeri, 166. 
Abutilon, 46, 305 
indicum, 46. 
periplocifolium, 46. 
Acacia, 321, 425. 
Acer campestre, 321. 
glabrum, 181. 
macrophyllum, 166. 
rubrum, 133,181,182, 319. 
saccharinum, 132,181,319. 
Acnida cannabina, 181. 
tuberculata, 61. 
Ac6nitum lycoctonum, 329. 
napellus, 321. 
Acridium perigrinum, 178,191. 
iEcidium podophylli, 182. 
.ZEsculus,301. 
glabra, 102. 
liippocastaneum, 181,183. 
Agave americana, 315. 
rigida, 315. 
salmiana, 315. 
Agropyrum glaucum, 131, 319. 
repens, 98,161. 
Agrostis, 330. 
stolonifera, 321. 
vulgaris, 422. 
Aleyrodes citri, 363. 
Alfalfa, 161, 411. 
Alga-, 135, 322. 
Alisrua plantago, 181. 
Allionia incarnata, 113. 
Allium ampelopnasum, 326. 
coepse, 184. 
Almond, 66, 78, 232, 304, 354, 360. 
Alnus incana, 320. 
Alopecurus, 98. 
Alternanthera, 414. 
acbyrantha, 320. 
Altlnea rosea, 44, 45, 47. 
Amarantus chlorostachys, 115. 
ch'lorostachys var. bybridus, 115. 
crispus, 115. 
retroflexus, 116. 
spmosus, 115. 
Ambrosia, 112. 
ai'temisiaifolia, 112, 119. 
tribda, 119. 
,4melanchier canadensis, 61, 280, 
Ammophila arenaria 321. 
arundinacea, 321. 
Ampelopsis quinquefolia, 276. 
veitchii, 57. 
Andropogon annulatus, 326. 
argenteus, 320. 
muricatus, 320. 
provincialis, 320. 
virginicus, 189, 281, 320. 
Anemone nemorosa, 179. 
pennsylvanica, 116. 
ranunculoides, 179. 
Angelica atropurpurea, 181. 
Anguilla?, 322. 
Animals, 139, 293, 322. 
Ant, 191, 329, 425. 
Antlioxanthum, 98. 
Antirrhinum majus, 183. 
Apple, 54, 55, 153, 154, 162, 163, 164, 167, 168, 170, 
173, 174, 175, 294, 297, 298, 299, 302, 303, 
304, 306, 309, 310, 311,373, 400, 408, 409 
411, 412, 417, 418, 419, 420, 421, 422. 
Apricot, 101,156,157,354,411. 
Arabia, 326. 
holbcellii, 122, 277. 
Aralia racemosa, 181. 
Aristida pungens, 281 
Arnica cord i folia, 181. 
Arrhenatherum elatius, 428. 
Artemisia biennis, 112. 
camphorata, 182,183. 
cana, 181. 
Asclepiadaceae, 275. 
Asparagus officinalis, 425. 
Aspidosperma quebrachii, 322. 
Asprella hystrix, 161, 276,320. 
Aster, 330. 
novse-anglhe, 118. 
Astragalus alpinus, 326. 
melilotoides, 326. 
Avena, 98, 327. 
elatior, 98, 320. 
B. 
Baccliaris, 276. 
Balanus balanoides, 428. 
Bambusa, 320,326. 
Bambusacea?, 322. 
Bananas, 48, 407. 
Banksia, 181. 
Barberry, 327, 
