INDEX OF SUBJECTS 



359 



History: of Chicago region, 13-15; 



geological, 45-48. 

 Hog-nosed snake, 231. 

 Hornet, white-faced, hibernation of, 192. 

 Horntails, 217. 

 Humus in soil, 158. 

 Hydra, 107, 131. 

 Hymenoptera: scientific names: 

 — A gaposte mo n: 



splendens, 232, 259. 

 viridiilus, 297. 

 — Ammophila. 231: 

 nigricans, 285. 

 procera, 231. 

 — Andrenidae, 224, 255. 

 — Andricus seminator, 234, 260. 

 — Anomoglossus pusillus, 188. 

 — Anoplius: 



divisus, 222, 252. 

 marginatus, 255. 

 — Apidae, 224. 

 — Apis mellifera, 214. 

 — Augochlora: 



confusa, 187, 252. 

 pura, 239, 256. 

 — Bembex spinolae, 222, 223, 252. 

 — Bombus: 



americanorum, 214. 

 separatus, 290, 297 

 — Ceropalidae, 255. 

 — Chloralictus cressoni, 277. 

 — Cimbex americana, 208, 267. 

 — Coeloixys rufitarsus, 231, 255. 

 — Crabro interruptulus, 277. 

 — Dielis plumipes, 222, 252. 

 — Epeolus: 



cress onii, 285. 

 pusillus, 231, 253. 

 — Eumenes jraternus, 266, 276. 

 — Eumenidae, 255. 

 — Halictus nelumbonis, 255. 

 — Ichneumon: 



extrematatus, 192. 

 galenus, 192, 297. 

 mendax, 191, 192. 

 zebratus, 285. 

 — Ichneumonidae, 261. 

 — Larridae, 255. 

 — Microbembex, 223: 



monodonta, 222, 223, 252. 

 — Mutilla ornativentris, 222, 252. 

 — Nematinae, 205. 

 — Odynerus: 



anormis, 231, 255. 

 tigris, 276. 

 — Paniscus gemminatus, 285. 

 — Pelopoeus cementarius, 214, 254. 

 — Pimpla: 



conquisiwr, 214. 

 inquisitor, 191. 



— Plesia inter rupta, 255. 

 — Polistes, 241, 266: 



variatus, 276, 297. 

 — Pteronus ventralis, 667. 

 — Scelipron cementarius, 285. 

 — Scoliidae, 255. 

 — Specodes dichroa, 231, 252. 

 — Tachytes texanus, 255. 

 — Thalessa atrata, 261. 

 — Trogus vulpinus, 261. 

 — Tiphia vulgaris, 286, 289, 290. 

 — Vespa maculata, 192, 202, 256. 

 — Xiphydria maculata, 207. 



Ice-sheet: Wisconsin, 45; advance and 

 retreat, 43-46; drainage from, 45, 

 46. 



Indians, 13. 



Insects: carriers of disease, 21; enemies 

 of, 9, 10; human food, 21. 



Inter-mores physiology, 34, 35. 



Inter-physiology, 34, 35. 



Isle Royale, 195. 



Isopods. See Sowbugs. 



Lacebugs, 232. 



Lake: Chicago, 45-47; Geneva, 62-63; 

 Michigan, area, 73, bottom communi- 

 ties, 78-81, communities, 73-85, condi- 

 tions, 58-65, light, 63, pressure, 64, 

 temperature, 62, species, 83-85; On- 

 tario, 78; Pine, 67; Turkey, 67. 



Lake communities, 73-85, 124-36; sum- 

 mary concerning, large lake, 81, small 

 lake, 128, 131. 



Lake herring, 77. 



Lakes: circulation in, 60; distinguished 



from ponds, 124. 

 Lampreys, 219. 

 Larch or tamarack: sawfly, 195; lappet 



moth, 195; woolly aphid, 195. 

 Lark: bunting, 286, 289; horned, 167, 



289; meadow, 167, 283, 289; shore, 



286. 

 Larvae: lepidopterous, 167; sawfly, 167. 

 Laws: minimum, 68; toleration, 302; 



limit of range, 304; distribution area, 



304. 

 Lawyer, 82, 85. 

 Leaf-beetles, long-horned aquatic, 65, 



123, 135, i5i- 

 Leaf -bugs, hibernating, 202. 

 Leeches: in Lake Michigan, 77, 80, 8^, 



84; in lakes and ponds, 129; in 



streams, 101, 103. 



