Joint worm, 55. Julus, 149, 169. Julus, embryology of, 164. July, insects of, 206. June, insects of, 200. Kowaleusky's researches on embryology of worms, 169. Labium, vi, 165. Lachnosterna fusca, 202. Lachnus, 220. Lady bird, 208. Larva, ernciform, 175. Leptiform, 175. Two kinds of, 175. Larval skin of crustacea, 166. Leaf cutter bee, 26, 206. Leaf roller, 188, 197, 205. Leeches, 166. Legs of insects, 173. Leidy, J., on internal parasites of insects, 39, 46. Lepidocyrtus, 144. Lepidopterous larvae, 175. Lepisma, 128. Leptiform larva, 175. Leptus, 120, 155, 159. Lespes, on sense of hearing in insects, xiv. Leucania, 55. Leuckart on embryology of Hirudo, 168. Parthenogenesis, 168. Libellula, 107, 195. Linden tree insects, 90. Linguatula, 160. Lipura, 145. Lithobius, 178. Locust tree insects, 93. Louse, 96, 154. Lubbock's discovery of Pauropus, 149. Lubbock, Sir John, on Thysanura, 133; on the origin of insects, 159, 173. Machilis, 128. Macrodactylus, 206. Macrosila cluentius, 184. Maggot, origin of, 175, 178. Mandible, vi. Mandibles of moths, 183. Mandibulate insects, 183. Mange mite, 125. Marey on the flight of insects, ix. Mason bee, 192. Maxillae, vi. Maxilla of moths, 184. May beetle, 202. May fly, 194. May, insects of, 192. Mazonia, 158. Meat fly, 82. Meek's discovery of fossil insects in Illinois, 158. Megachile, 26. Melipona, 18. Melitaea, 193, 207. Melitaea Phaeton, 204. Meloe, 21, 42. Metamorphosis of insects, 166, 175; origin of, 179. Miastor, 168. Microgaster, 49. Mites, 116, 149. Mosquito, 68. Mosquito hawk, 195. Mouth-parts of insects, origin of, 173. Mucor, 47. Mud dauber, 207. Mueller, Fritz, on ancestry of insects, 156, 169. Mueller, J., on sight in insects, xiii. Murray's discovery of Eophyton in America, 158. Musca, 80, 168. Muscardine, 47. Mycetobia, 73. Myobia, 169. Myriopoda, 149. Ancestry of, 159. Nannophya, 114. Nauplius, 155, 160. Nebalia, 182. Nephelis, 166. Nephopteryx, 49. Neuropterous larvae, 175. New Brunswick, fossil insects of, 158. Newport, on embryology of Julus, 164. Nicoletia, 131. Nomada, 38. Notonecta, 209. Nova Scotia, fossil insects of, 159. Ocypete, 159. Odynerus, 207. Oecanthus, 216. Oil beetle, 188. Onion fly, 49. Ophioneurus, embryology of, 165. Orchesella, 143. Ornithomyia, 84. Orthopterous larvae, 175. Osmia, 27. Otiorhynchus, 199. Ovipositor of Cicada, 185. Palpus, vi. Origin of, 174. Pangus, 191. Panorpa, 171, 209. Paper wasp, 207. Papilio Asterias, 200. Papirins, 142. Parasite of insect eggs, 164. Parsnip butterfly, 200. Parthenogenesis, 168. Pasteur on the silk worm disease, 63. Pauropus, 149, 154, 158, 171. Peach borer, 206.