INDEX. 
Kennedy, 89. 
Key, habitat, 29. 
Kirby, 96. 
Kiritshenks, 161. 
Kirkaldy, 15, 31, 86, 37, 41, 79, 92, 96, 
158, 165, 208, 235, 236. 
Kulgatz, 140, 160, 179. 
L. 
Lace bugs, 50. 
Lamarck, 14, 15. 
Lamprocanthia, 56, 77. 
Lamprocanthia crassicornis, 77, 80, 81. 
Laporte, 15. 
Latreille, 14, 79, 234. 
Leach, 15. 
Lemna, 92. 
Lethocerus, 30, 42, 148. 
Lethocerus americana, 40, 149. 
Lethocerus uhleri, 149. 
Limnobatidz (see Hydrometridz). 
Limnoporus, 107, 112. 
Limnoporus rufoscutellatus, 112. 
Limnodytes gerriphagus March, 32. 
Limnodytes setosus, 32. 
Locomotion, 39. 
Lucas, 158. 
‘Lundbeck, 121. 
M. 
Macrovelia, 122, 127. 
Macrovelia hornii, 127. 
Marshtreader (see Hydrometira). 
Marshtreaders, 24. 
Martin, 92, 93, 95. 
Marsilia, 144. 
Mason, 40. 
Matheson, 149. : 
Matheson and Crosby, 32. 
May fly larve, 158. 
Meneville, 15, 36. 
Meriam, 13, 36, 246. 
Merragata, 82, 83. 
- Merragata brunnea, 83, 84. 
Merragota foveata, 83. 
Merragota, Key to species, 83. 
Mesovelia, 39, 42, 99. 
Mesovelia mulsanti, 24, 33, 34, 100. 
Mesoveliide, 8, 11, 12, 25, 26, 29, 99 
Mesoveliidw, Biology of, 101-106. 
Metrobates, 29, 107, 118. 
Metrobates hesperius, 114, 119. 
Miall, 195. 
Microcanthia, 56, 74. 
Micranthia humilis, 74. 
Micranthia pusillo, 75. 
Microvelia, 8, 25, 26, 39, 42, 122. 
Microvelia albonotata, 124. 
Microvelia americana, 125, 235. 
339 
Microveiia atrata, 123. 
Microvelia borealis, 34, 1238, 137. 
Microvelia frontinalis, 125. 
Microvelia marginata, 12%. 
Microvelia robusta, 126. 
Microvelia aignota, 126. 
Microvelia, Key to species, 122. 
Midges, 34, 99, 117, 248. 
Mites (see water mites). 
Moneywort, 33. 
Mononyx, 48, 51. 
Mononyx jusecipes, 48, 51. 
Montondon, 46, 154. 
Mosquito larve, 161. 
Mosquito wrigglers, 34, 96, 97. 
Moss, 93. 
Mouffett, 18, 158, 190. 
Mougeotia, 245. 
Mymaride, 32. 
N. 
Naucoride, 8, 11, 12, 31, 40, 42, 198. 
Naucoridxw, Key to genera, 198. 
Naucoris, 208. 
Naucoris cinvicoides, 235. 
Needham, J, G:, 8, 11, 150, 151, 182. 
Nemotode worms, 242. 
Nepa, 13, 30, 152. 
Nepa apiculata, 152, 157, 158. 
Nepidw, 8, 11, 12, 40, 44, 151. 
Nepidx, Biology of, 157, 164. 
Nepide, Key to genera, 152. 
Nerthra, 48. 
Nerthra stygica, 48. 
Nitella, 208, 248. 
Notonecta, 13, 30, 32, 35, 41, 166, 179. 
Notonecta glauca, 179, 180. 
Notonecta howardii, 167, 168. 
Notonecta insulata, 168, 178, 180. 
Notonecta indica, 167, 168. 
Notonecta irrorata, 32, 38, 167, 171, 177, 
180, 182, 183. 
Notonecta lutea, 33, 117, 172. 
Notonecta mexicana, 167, 170. 
Notonecta montezuma, 168, 172. 
Notonecta raleighi, 167, 169. 
Notonecta shooterii, 168, 172. 
Notonecta uhleri, 167, 170, 180. 
Notonecta undulata, 96, 167, 169, 177, 
180, 190. 
Notonecta variabilis, 167, 169, 180. 
Notonectidsw, 8, 11, 12, 23, 26, 30, 31, 42, 
44, 117, 164. 
Notonectidze, Biology of, 177, 198. 
Notonectidx, Key to genera, 165. 
Notonectid eggs, 25. 
O. 
Ochteride, 8, 11, 29, 39, 42, 51. 
Ochteridx, Biology of, 53. 
Ochterus americanus, 53. 
