INDEX 
A 
Abies, 558. 
Abra sp., 472. 
Abutilon theophrasti, 293. 
Acanthaceae, 566. 
Acanthocephala, 225-257. 
Acanthocephalus, 238, 239. 
anguillae, 234. 
anthuris, 234, 
faleatus, 234. 
lucii, 233, 234. 
ranae, 234, 239, 254. 
Acantholoma, 169, 171. 
denticulata, 171. 
Acanthopteri, 230. 
Acanthosominae, 159, 166, 167, 195- 
196. 
Acerates floridana, 556, 565. 
viridiflora, 549, 565. 
lanceolata, 549. 
linearis, 549, 
Achillea millefolium, 568. 
Acorus calamus, 554, 561. 
Acremonium, 262, 263. 
Acrididae, 158. 
Acrometopia, 346. 
punctata, 346. 
Acrosternum, 176, 178, 181. 
hilare, 181. 
pennsylvanicum, 181. 
Aédes canadensis, 320. 
sp., 320, 321. 
sylvestris, 320, 321. 
taeniorhynchus, 320, 321. 
Aelia, 166, 167, 179, 186. 
Aethus, 204, 205. 
obliquus, 205. 
Agelaius phoeniceus, 125. 
Agrionid nymphs, 
510, 512-520. 
Agrionidae, 431. 
Agromyzidae, 345. 
Agropyron, 262. 
repens, 560. 
scabrum, 262. 
Agrostis, 260. 
alba, 534, 537, 538, 589, 540, 542, 544, 
560. 
hyemalis, 560. 
Aizoaceae, 562. 
Alcaeorrhynchus, 196. 
Aletia, 189. 
Algae, 440, 441, 442, 448, 457, 573. 
filamentous, 419. 
Alisma plantago-aquatica, 554, 559. 
Alismaceae, 559. 
Allium canadense, 561. 
cernuum, 561. 
Allorhina, 132. 
nitida, 89. 
Alydinae, 161. 
Alydus, 160, 161. 
Amaranthaceae, 562. 
Amaranthus blitoides, 293. 
graecizans, 293, 562. 
retroflexus, 293. 
Amaryllidaceae, 562. 
Amaurochrous, 171. 
cinctipes, 171, 172. 
dubius, 172. 
parvulus, 171, 172. 
Ambloplites rupestris, 27, 230, 236. 
Ambrosia artemisiifolia, 293, 568. 
bidentata, 568. 
Psilostachya, 183, 556, 568. 
trifida, 293. 
478, 479, 504-507, 
