67 



ventraiis, V, 48. 

 Ophibolus, V, 30, 33. 

 calligaster, V, .34. 

 doliatus, var. coccineas, V, 34. 

 var. doliatus, V, 34. 

 var. triangulus, V, 34. 

 getulus, var. getulus, V, 33. 



var. sayi, V, 34. 

 rhombomaculatus, V, 34. 

 Ophidia, V, 26, 27. 

 Oporornis, IV, 175. 

 agilis, IV, 175. 

 formosa, IV, 175. 

 Opsomala brevipennis, I, G]. 



punctipennis, I. 61. 

 opulus, Viburnum, II, 12. 

 Orange-crowned Warbler, IV, 114. 

 Orchard birds. VI, 19*, 20*. 



Oriole, IV. 182, VI, 14*, 26*, 27*. 

 Orchestida?, I, 20. 

 ordinata. Eutceoia, V, 40. 

 Oregon Robin, IV, 204. 

 Snowbird, IV, 180. 

 oregonus, Junco, IV, 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, IV, 182, VI. 14*, 24*, 

 25*. 

 Golden, IV. 182. 



Orchard, IV, 182, VI, 14*, 26*, 27*. 

 'Orioles, VI, 14*. 

 ornata. Tettix, I, 69, III, 140f. 

 ornatum, Acrydium, I, 69. 

 .ornatus, Centrophanes, IV, 205. 



Chorophilus, V, 19. 

 Ornithology. Bibliography of Illinois, 



IV, 168rl70. 

 Orthoptera, I, 59, II, 77t, 84t. SSf, 86t, 

 III, 95t, 98t, lOlt. 105t, 108t, 

 1091^11%, lllf.ll2t, 113, 114t, 

 Hot, 117t; 119t, 121t, 122f. 

 123t, J24f, 126t, 128t, 130t, 

 1^2t, 133f, ]35t, 136t, 138t, 

 139t, I40f, 141t, 142t, 143t, 

 144t, 145|. I48f, VI, 6, 7, 19t, 

 25+, 27f, 49t, 94t. 

 of Illinois, A list of the, 59-69. 



Orthotrichum, II, 20. 

 Ortolan, IV, 197. 

 Ortyx, IV, 192. 



virginiana, IV, 192, VI, 17*, 29*, 

 31*, 32*. 

 var. fljridana, IV, 192. 

 oryzivorus, Dolichonyx, IV, 182, 197. 

 Osceola, V, 30, 33. 



elapsoidea, V, 33. 

 Oscillatoria, VI, SOf, lOlf. 

 Oscines, IV, 171. 

 Osprey, American, IV, 188. 

 osseus, Lepidosteus, I, 51, H, 68. 

 Ostracoda, I, 22, II. 77t, 81t, 82, III, 

 27t, 36t, 52f , 54t, 55t, 60t, 61t, 

 62t, 63t, 64t, 6St, 71t, 73t, 74t, 

 78t, 79t, VI, 70t, 72t, 83t, 85t, 

 93t, 94t. 

 ossifragus, Corvus, IV, 183, 206. 

 Oswego Bass, II, 44. 

 Ovules of grass. III, 156f. 



plants. III, 157t. 

 Owl, American Hawk, IV, 188. 



Barn, IV, 187. 



Barred, IV, 187. 



Burrowing, IV, 207. 



Great Gray, IV, 187. 



Great Horned, IV, 187. 



Hoot, IV, 187. 



Little Red, IV. 187. 



Long- eared, IV, 187. 



Mottled, IV, 187. 



Richardson's, IV, 207. 



Saw-whet, IV, 187. 



Screech, IV, 187, 191. 



Short-eared, IV, 187. 



Snowy, IV, 188. 



Western Horned, IV, 187. 

 Owls, III, 103, IV, 187, 207. 

 Oxyechus, IV, 194. 



vociferus, IV, 194. 



Paddle-Fish, II, 69. 

 Painted Longspur, IV, 178. 



Turtle, V, 56. 

 Southern, V, 56. 

 Palfemon, I, 19. 



ohionis, I, 5, 19. 



exilipes, I, 5, 20, III, SOf. 

 Palsemonetes, I, 19, III, 36, 48t, 52t. 



