INDEX 



Hyallela, 170, 171; knicker- 



bockeri, 170 

 Hyborhynchus notatus, 336- 



337 

 Hydra, 246; fusca, see H. 



oligactis; grisea, see //. 



vulgaris; oligactis, 118; vir- 



idis, 118; viridissima, 114, 



118; vulgaris, 118 



Hydras, 52, 112-118; aquar- 

 ium study, 1 1 6-1 17; associ- 

 ates, 116; brown, 118; 

 brown and green, 167; col- 

 lecting, 1 1 6-1 17; food, 116; 

 form and habits, 11 2-1 15; 

 identification, 117 



Hydracarina (water-mites) , 



175-178 



Hydrachna, 175; geographica, 

 177-178 



HydrocharitacecB (water- weeds 

 and eel-grass), 79-82 



Hydrometra martini, 228-229 



HydrometridcB (water-measur- 

 ers), 227, 228-229 



Hydrophilidce (water scaveng- 

 ers), 262, 263, 264, 265, 



273-277. 

 Hydrophilids, 262, 267, 273- 



277 



Hydrophilus, 274, 275 



Hydroporus, 263 

 Hydropsyche, Frontispiece, 22, 



195, 211, 251-253 

 HydropsychtdcB, 249, 251 

 HydroptilidcB (microcaddis 



flies), 249 

 Hydrozoa (hydras), 117 

 HygrohatincE, 178 

 Hygrohypnuni, 25, 34, 64; 



ochraceum, 64 

 Hyla crucifer, 352, 375-376, 



386; pickeringi, see H. 



crucifer; versicolor, 352, 



373-375, 386 

 HylidcB (tree frogs), 373- 



375 

 Hymenoptera, 179 



HypnacecB (hypnums), 64-65 



Hypnums, water, 64-65 



Jcthyobdellidce, 153 



Insecta, 179-300; key to 

 orders of nymphs and 

 larv£e, 189-190; Coleoptera, 

 190, 261-281; Collembola, 

 190-192; Diptera, 189,282- 

 300; Ephemerida, 189, 198- 

 213; Hemiptera, 189, 225- 

 240; Lepidoptera, 190, 257- 

 261; Neuroptera, 189, 190, 

 240-246; Odonata, 189, 

 2 1 3-2 2 5 ; Plecoptera, 1 89 , 

 193-213; Trichoptera, 190, 

 247-257 



Insects, 103, 152, 154, 179- 

 300; adults, 263; alder- 

 flies, 240, 241-243; aquatic, 

 31, 57, 178; as food, 116; 

 beetles, see beetles; caddis- 

 flies, see caddisflies; dob- 

 son-flies, 240, 241, 243- 

 244; dragonflies and damsel 

 flies, see dragonflies; Dytis- 

 cidce, 267; fish-flies, 240, 

 244-245; flies, see flies; 

 flying, collecting of, 28; 

 growth of, 185-188; key 

 to orders (nymphs and 

 larvae), 189-190; im- 

 mature, in rapids, 22; kill- 

 ing of, 29, 40; lily pads, 

 hatchery for, 15; mayflies, 

 see mayflies; moths, see 

 moths; parts of, 180-185; 

 preserving of, 40-45; re- 

 laxing of, 41, 42, 43; spon- 

 gilla-flies, 109, 240, 245- 

 246; springtails, 31, 179, 

 190-192, 226; stoneflies see 

 stoneflies; water-bugs, see 

 water-biigs 



Iron, 23, 21 1-2 13 



Ischnura, 214, 224; verticalis, 

 224-225 



Isopoda (sow-bugs), 161, 171- 

 172 



Ithytrichia confusa, 249 



Jellyfishes, fresh water, 112- 



118 

 Joint weed, 99-100 

 June "bugs", 262 



439 



