

499 

 Index 



denticollis, 150, 151 



erratica, 150, 151 



extriata, 159 



gemina, 150, 151 



perparva, 150, 151 



ramburii credula, 150, 151 



utahensis, 150 

 Isocapnia, 157, 159, 160, 169 



abbreviata, 169 



fumosa, 169 



grandis, 169 

 1 Isogeninae, 159, 173 

 Isogenoides, 173, 175 

 Isogenus, 159, 162, 173 

 key to subgenera and species: males, 

 174 



alameda, 175 



bilobatus, 175 



duplicatus, 175 



Ierratus, 174 

 expansus, 175 

 frontalis colubrinus, 173, 175 

 hastatus, 175 

 misnomus, 175 

 monus, 175 



Ipilatus, 175 

 sorptus, 173, 174 

 tostonus, 175 

 yakimae, 174 

 Isohelea, 434 

 Isonychia, 89, 91 



velma, 91 

 Isoperla, 159, 162, 175 

 key to species: adults, 175 

 cascadensis, 176 

 chrysannula, 176 

 ebria, 176 

 fulva, 176 

 insipida, 176 

 marmorata, 176 

 mormona, 176 

 patricia, 176 

 pinta, 176 

 5-punctata, 176 

 sordida, 176 

 trictura, 175 

 Isoperlinae, 159, 162, 175 

 Isotoma, 77 



besselsii, 77 

 j Isotomidae, 75, 76 

 key to genera: 77 

 I Isotomurus, 77 



palustris, 77 

 1 Ithytrichia, 254 

 Itonididae, 372 



Jenkinshelea, 426 

 Johannsenomyia, 426, 428, 435 

 key to species: adults, 435 



caudelli, 435 



flavidula, 435 



ha'lteralis, 435 



pullata, 435 



sybleae, 435 



Kathroperla, 159, 162, 177 



perdita, 177 

 Kemmerer water sampler, 64 

 Kiefferulus, 423 

 Kogotus, 175 

 Koo-chah-bee, 472 

 Kribioxenus, 409 

 Krizousacorixa 



femorata, 189 



azteca> 189 



Labostigmina, 439, 442 



similis, 442 

 Laboulbenia, 328 



gyrinidarum, 325 

 Laboulbeniales, 294, 328 

 Laccobius,297, 336, 338, 340, 341 

 key to species: adults, 343 



agilis, 343 



californicus, 344 



carri, 343 



ellipticus, 343 



insolitus, 343 

 Laccodytes, 310 

 Laccophilini, 294 

 Laccophilus, 307, 308, 310, 313 

 key to species: adults, 314 



atristernalis, 314 



decipiens, 3 14 



maculosus, 294 



quadrilineatus, 314 



terminalis, 3 14 

 Laccornis, 309 

 Lachlania, 105 

 Lachnodactyla, 367 

 Ladona, 124, 126 

 Lakes, 15 

 oligotrophic, 16 

 eutrophic, 17 

 dystrophic, 17 

 formation of, 17 

 Lampracanthia, 225 

 Lamproscatella, 466 

 key to species: adults, 474 



cephalotes, 475 



dichaeta, 475 



nivosa, 4 75 



quadrisetosa, 475 



salinaria, 475 



sibilans, 475 

 Lanea, 404 

 Lanthus, 114 

 Lara, 358, 359, 361 

 key to species: adults, 362 



avara, 362 



gehringi, 362 

 Larini, 359, 360 

 Larvae, 71 



campodeiform, 71 



eruciform, 71 



vermiform, 71 

 Lasiodiamesa, 408, 410, 411 

 Lasiohelea, 424, 425 

 Lauterbornia, 422 



Lauterborniella, 409, 411, 412, 420 

 Leather jackets, 378 

 Lecithodendrium, 294 

 Lednia, 165, 167 

 Lemnaphila, 465, 469 



scotlandi, 469 

 Lenarchus, 259, 261 



graviuuSj 261 



rillus, 261 

 Lenzia, 422 

 Lepiceridae, 346 

 Lepidoptera, 72, 271 

 biology, 271 

 classification, 271 

 parasites, 271 



preserving and collecting, 272 

 Lepidostoma, 266, 267 

 key to species: males, 267 



astanea, 268 



cantha, 267 



cascadensis, 268 



errigena, 267 



jewetti, 268 



lotor, 267 



mira, 268 

 podager, 268 

 rayneri, 267 

 roafi, 268 

 strophis, 268 

 unicolor, 268 

 Lepidostomatidae, 242, 243 

 key to genera: adults, 267 

 Lepthemis, 124, 126 

 Leptocella, 264, 265 

 Leptoceridae, 242 

 key to genera: adults, 264; larvae, 

 264 

 Leptocerus, 264 

 Leptoconopinae, 425, 427, 428 

 Leptoconops, 424, 425, 427, 428 

 keys to species: adults, larvae, 428 

 freeborni, 428 

 kerteszi, 428, 429 

 torrens, 428, 429 

 Leptohyphes, 99 

 Leptophlebia, 92 

 Leptophlebiinae, 82, 89, 92 



key to genera: adults, 92; nymphs, 92 

 Leptopsilopa, 465 

 key to species: adults, 468 

 atrimana, 468 

 varipes, 468 

 Lestes, 138, 139 

 key to species: males, 140; females, 

 naiads, 141 

 alacer, 141 

 congener, 140 

 disjunctus, 141 

 dryas, 140 

 forcipatus, 141 

 stultus, 140 

 unquiculatus, 141 

 Lestidae, 109, 111, 138 



key to genera: adults, naiads, 138 

 Lethocerus, 185, 186, 203, 206 

 key to species: 206 

 americanus, 204, 206 

 angustipes, 206 

 annulipes, 205 

 indicus, 204 

 Leucorrhinia, 124, 125, 126, 131 

 key to species: adults, 131; naiads, 

 131 

 glacialis, 131, 

 hudsonica, 131 

 intacta, 131 

 Leucotabanus, 445 

 Leucotrichia, 254, 255 



pictipes, 255 

 Leuctra, 158, 160, 168 

 key to subgenera and species: adults, 

 168; nymphs, 169 

 augusta, 168, 169 

 bradleyi, 169 

 claasseni, 168 

 forcipata, 169 

 glabra, 168 

 infuscata, 168, 169 

 occidentalis, 169 

 projecta, 169 

 sara, 169 

 Leuctrinae, 157, 160, 168 

 Libellula, 125, 126, 133, 134 

 key to species: males, females, 

 naiads, 133 

 comanche, 134 

 composita, 134 

 forensis, 134 

 luctuosa, 134 

 nodisticta, 134 

 pulchella, 134 



