356 ' 



Myriopoda Continued: 



Spirobolns marginatus, 201, 236, 237, 



243. 253. 

 My sis relict a, 80, 81, 85. 



Natural selection, 25. 



Nature: 5, 6; man and, 8-20; man- 

 made, 8; state of, 7; struggle in, 7. 



Neurpptera, scientific names: 



Chauliodes, 123. 



rastricornis, 145, 148, 150, 155. 



Chrysopa: 



albicornis, 297. 

 oculata, 214, 291. 

 rufialbris, 261. 



Corydalis cornuta, 116, 121. 



Cryptoleon nebulosum, 283. 



Mantis pa brunnea, 273, 274. 



Sialis, 121. 



Newt, 121, 149, 156. 



Nitrates, 66. 



Nitrogen: 59, 60; cause of gas-bubble 

 disease, 60; in lakes, 125; in spring 

 water, 93. 



Number of individuals, relation to area 

 of optimum, 303. 



Onion-fly, 293. 



Optimum, range of, 30x5-305. 



Oriole: Baltimore, 274, 275; orchard, 



274. 



Orthoptera, 243, 272, 285, 292, 306. 

 Orthoptera, scientific names: 

 Acrididae, 187, 204. 

 Ageneotettix arenosus, 227, 252. 

 Amblycorypha, 205: 



oblongifolia, 208, 266, 267, 276. 



rotundifolia, 272. 



uhleri, 241. 



Apithes agitator, 268. 

 Apterygida aculeata, 194, 205. 

 Atlanticus pachymerus, 239, 260. 

 Ceuthophilus, 205, 237, 239, 243. 

 Chloealtis conspersa, 232, 259. 

 Conocephalus: 



ensiger, 232, 259, 298. 



nebrascensis , 264, 276. 



robttstus, 265. 



Cyrtophillus perspicillatus, 241, 260. 

 Diapheromera femorata, 187, 235, 241, 



257- 



Dissosleira Carolina, 198, 214, 218, 254. 

 Gryllus pennsylvanicus , 218. 

 Hippiscus tuberculatus, 255. 

 Ischnoptera: 



inaequalis, 218. 



major, 218. 



Melanoplus: 



angustipennis, 227, 252. 



atlanis, 225, 228, 252. 



bivittatiis , 198, 218, 276, 285, 297. 



differentiates, 266, 276. 



femur-rubmm, 187, 214, 218, 223, 



276, 285, 296. 



punctulatus, 194, 195, 205. 



viridipes, 297. 

 Nemobius: 



fasciatus vittatus, 298. 



maculatus, 263, 297. 

 Neotettix hancocki, 190. 

 Oecanthus: 



angustipennis, 241, 260, 272. 



fasciatus, 232, 257, 272, 276. 

 nivens, 272. 

 Orchelimum: 



glaberrimum, 204, 208. 



indianense, 276. 



vulgare, 292, 296, 298. 

 Orphulella speciosa, 297. 

 Paratettix cucullatus, 181, 186. 

 Paroxya hoosieri, 204. 

 Psinidiafenestralis, 223, 225, 252. 

 Schistocerca rubiginosa, 232, 257. 

 Scudderia, 214, 217: 



furcala, 241, 266, 267, 276. 



texensis, 232, 259, 266, 277, 293, 



297, 298. 



Sparagemon wyomingianum, 228, 252. 

 -Stenobothrus, 170: 



curtipennis, 188, 204, 266, 285, 296, 



298. 

 Tettigidea: 



armata, 181. 



parmpennis, 181, 282. 



pennata, 236, 282. 

 -Tettix obscura, 190. 

 Trimerotropis maritima, 223, 252. 

 Xiphidium, 170: 



brevipenne, 188, 208, 263, 266. 



ensiferum, 215. 



fasciatum, 39, 188, 263, 264, 284, 



285, 296. 



nigropleura, 263, 276. 



strictum, 232, 259, 292, 293, 298. 

 Osprey, 226. 

 Ostracods, 129. 



Ostracods or Ostracoda, scientific names: 

 Cypria exsculpta, 152. 

 Cypridopsis vidua, 130, 152. 

 Cypris fuscata, 185. 

 Cyprois marginata, 177, 179, 185. 

 Notodromas monacha, 144. 

 Ostracoda, 144. 

 Potamocypris smaragdina, 134. 



Otter, 195, 199. 

 Oven-bird, 244. 



