340 



Index. 



Ochterti,s banksi, 52. 



Ochterus flaviclavus, 52. 



Ochterus, Key to species, 51. 



01igocha?tes, 35, 242. 



Oliver, 14. 



Ormerod, 161. 



Orthoptera, 39. 



Oscellatoria, 244, 245, 247. 



Ostrocods, 24, 26, 34, 35, 42, 96, 97, lO; 



138, 161, 177, 186, 191, 193, 248. 

 Oviposition of aquatics, 33. 



Palmocorixa, 186. 



Palmoeorixa, 211, 212. 



Palmocorixa, Key to species, 213. 



Palmocorixa buenoi, 27, 213, 221. 



Palmocorixa yiUettii, 213, 214. 



Palumba, 92. 



Paramecium, 247. 



Parasites, 182. 



Parasitism, 31, 32, 231. 



Parshley, 51. 



Pediastrum, 248. 



Pelocoris, 198, 205, 208. 



Pelocoris biimpressus, 206, 207. 



Pelocoris caroHnensis, 205, 206. 



Pelocoris femoratiis, 206, 207, 209. 



Pelocoris, Key to species, 205. 



Pelogonus, 51. 



Pentacora, 55, 56. 



Pentacora hiria, 57. 



Pentacora ligata, 58. 



Pentacora signoreti, 56. 



Pettit, 160. 



Phyllopods, 186. 



Plant lice, 101, 102. 



Plea, 12, 30, 35, 41, 165, 177. 



Plea minutissiina, 179. 



Plea striola, 33, 166, 177. 



Polygonum amphibium, 235. 



Potamogeton, 101. 



Prestwichia aquatica. 32, 160. 



Proctrotrypidre, 32. 



Protozoa, 242. 



Protozoa, 35. 



R. 



Ramphocorixa acuminata, 33, 211, 212, 215. 



Ranatra, 13, 30, 31, 32, 153, 158. 



Ranatra brecivolis, 155. 



Ranatra americana, 154. 



Ranatra annulipes, 159. 



Ranatra kirkaldyi, 154. 



Ranatra nigra, 154. 



Ranatra protcnsa, 156. 



Ranatra quadridentata. 158. 



Ranunculus aquatiles, 179. 



Rathke, 235. 



Reaumur, 13, 14, 15. 



Redfern, 195. 

 Regembart, 180, 208. 

 Respiration of aquatics, 43. 

 Reuter, 9, 11, 54, 211. 

 Rhagovelia, 30, 122, 128, 139. 

 Rhagovelia armata. 128, 130. 

 Rhagovelia distincta, 128, 129. 

 Rhagovelia obesa, 40, 128. ^ 

 Rhagovelia phimbea, 128, 130. 

 Rheumatobates, 30, 33, 34, 42, 107, 



115, 120. 

 Rheumatobates, Key to species, 116. 

 Riley, C. F. C, 117. 

 Riley, C. V., 148. 

 Riley, W. A., 181. 

 Rivuiaria, 246. 

 Ripsel, 13, 14, 157, 158, 208. 

 Rotifers, 35, 242, 244. 



S. 

 Salda, 55, 59. 



Salda anthracina, 61, 80, 81. 

 Salda coriacea, 60. 

 Salda littoralis, 59. 

 Saldid!©, 8, 11, 12, 18, 26, 29, 33, 39, 



42, 54. 

 Saldidse, Biology of, 79. 

 Saldinre, Key to genera, 55. 

 Saldoida, 78. 

 Saldoida cornuta, 79. 

 Saldoida slossoni, 78. 

 Saldula, 55-62. 

 Saldula conflventa. 63. 

 Saldula dispersa. 65. 

 Sahhda elongata, 72. 

 Saldula explanata. 64. 

 S(ddiila interstitialis. 65. 

 Saldula laticoUis, 69. 

 Saldula luctxiosa, 73. 

 Saldula higubris, 72. 

 Saldula major, 62. 

 Saldula opacula, 70. 

 Saldula orbiculata, 63. 

 Saldida pellita, 71. 

 Saldula rcperta, 67. 

 Saldula saltatoria. 73. 

 Saldula scotica, 71. 

 Saldida separata, 66. 

 Saldula sphacelate, 69. 

 Saldula pallipcs. 68. 

 Saldula zanthoehila, 68. 

 Savigny, 15. 

 Say, 36. 



Scenedesmus. 35-244. 

 Schmidt, 144. 

 Schummel, 15. 

 Scirpus, 157. 

 Scott, 101. 

 Sedge, 103. 

 Severin & Severin, 145, 158. 



