INDEX. 
67 
ventralis, V, 48. 
■Ophibolus, Y, 80, 83. 
calligaster, V, 34. 
doliatus, var. coccineos, V, 34. 
var. doliatus, V, 34. 
var. triangulus, Y, 34. 
getulus, var. getulus, V, 33. 
var. sayi, V, 34. 
rkombomaculatus, Y, 34. 
Ophidia, Y, 26, 27. 
•Oporornis, IV, 175. 
agilis, IY, 175. 
formosa, IY, 175. 
Opsomala brevipennis, I, 61 . 
punctipennis, 1,-61. 
opulus, Viburnum, II, 12. 
Orange-crowned Warbler, IV, 114. 
Orchard birds, VI, 19*, 20*. 
Oriole, IY, 182, YI, 14*, 26*, 27*. 
Orchestidae, I, 20. 
ordinata, Eutsenia, Y, 40. 
Oregon Robin, IY, 204. 
Snowbird, IV, 180. 
oregonus, Junco, IY, 170, 180. 
Organisms, On some interactions of, III, 
3-17. 
orientalis, Blatta, I, 60. 
Kakerlak, I, 60. 
Periplaneta, I, 60, 
Stylopyga, I, 60. 
Oriole, Baltimore, IY, 182, YI, 14*, 24*, 
25*. 
Golden, IY, 182. 
Orchard, IV, 182, YI, 14*, 26*, 27*. 
Orioles, YI, 14*. 
ornata, Tettix, I, 69, III, 140f. 
ornatum, Acrydium, I, 69. 
ornatus, Centrophanes, IV, 205. 
Chorophilus, Y, 19. 
Ornithology, Bibliography of Illinois, 
IY, 168-170. 
Orthoptera, I, 59, II, 77f, 84f, 85f, 86f, 
III, 95f, 98f, 101f, 105f, 108f, 
109f, 110f, 1 1 If, 112f, 113, ll4f, 
115f, 117f, 119f, 121f, 122f, 
123f, 124f, 126f, 128f, 130f, 
132f, 133f, 135f, 136f, 138f, 
139f, 140f, 141f, 142f, 143f, 
144f, 145 j, 148f, YI, 6, 7, 19f, 
25f, 27f, 49f, 94f. 
of Illinois, A list of the, 59-69. 
Orthotrichum, II, 20. 
Ortolan, IY, 197. 
Ortyx, IY, 192. 
virginiana, IY, 192, VI, 17*, 29*, 
31*, 32*. 
var. floridana, IY, 192. 
oryzivorus, Dolichonyx, IY, 182, 197. 
Osceola Y, 30, 33. 
elapsoidea, Y, 33. 
Oscillatoria, VI, 80f, 101f. 
Oscines, IY, 171. 
Osprey, American, IV, 188. 
osseus, Lepidosteus, I, 51, II, 68. 
Ostracoda, I, 22, II, 77f, 81f, 82, III, 
27f, 36f, 52f, 54f, 55f, 60f, 61f, 
62f, 63f, 64f, 68f, 71f, 73f, 74f, 
78f, 79f, YI, 70f, 72f, 83f, 85f, * 
93f, 94f. 
ossifragus, Corvus, IY, 183, 206. 
Oswego Bass, II, 44 
Ovules of grass, III, 156f. 
plants, III, 157f. 
Owl, American Hawk, IV, 188. 
Barn, IY, 187. 
Barred, IV, 187. 
Burrowing, IV, 207. 
Great Gray, IY, 187. 
Great Horned, IY, 187. 
Hoot, IY, 187. 
Little Red, IY, 187. 
Long-eared, IV, 187. 
Mottled, IY, 187. 
Richardson’s, IY, 207. 
Saw-whet, IY, 187. 
Screech, IY, 187, 191. 
Short-eared, IY, 187. 
Snowy, IY, 188. 
Western Horned, IV, 187. 
Owls, III, 103, IY, 187, 207. 
Oxyechus, IY, 194. 
vociferus, IY, 194. 
P 
Paddle-Fish, II, 69. 
Painted Longspur, IY, 178. 
Turtle, Y, 56, 
Southern, Y, 56. 
Palsemon, I, 19. 
ohionis, I, 5, 19. 
exilipes, I, 5, 20, III, 30f. 
Palsemonetes, I, 19, III, 36, 48f, 52f. 
