506 

 Index 



serrata group, 95 

 key to species: adults, 95; nymphs, 

 96 



cognata, 96 



levis, 96 



micheneri, 96 



tibialis, 96 



teresa, 96 

 Serromyia, 425, 435 



barberi, 435 



femorata, 435 

 Setacera, 466, 472 

 key to species: adults, 472 



aldrichi, 472 



atrovirens, 472 



durani, 472 



needhami, 472 



pacifica, 472 

 Setipalpia, 155, 157, 160, 173 



eggs, 156 

 Setodes, 264, 265 

 Setvena, 173 

 Shipsa, 166, 167 

 Shore bugs, 223 

 Shore flies, 462 

 Sialidae, 229 

 Sialis, 229 

 key to species, 230 



arvalis, 230 



califomica, 230 



nevadensis, 229, 230 



occidens, 230 



rotunda, 230 

 Sierraperla, 164 

 Sigara, 191, 193 

 key to species; 196 



alternata, 190, 196 



grossolineata, 196 



mckinstryi, 193, 196 



nevadensis, 196 



omani, 196 



vandykei, 196 



washingtonensis, 196 

 Silver beetles, 334 

 Silvius, 444 

 key to species: 446 



gigantulus, 446 



jonesi, 446 



notatus, 446 



philipi, 446 



quadrivittatus, 446 



sayi, 446 

 simplexlgroup, 95 

 key to species: nymphs, 98 



delantala, 98 



soquele, 98 

 Simuliidae, 373, 375, 376, 401 



key to genera: adults, pupae, 403 

 Simulium, 403 

 key to species: females, 404; males, 

 405; pupae, 406 



arcticum, 405, 406 



argus, 404, 405, 406 



aureum, 404, 405, 406 



bivittatum, 404, 405, 406 



canadense, 404, 405, 406 



canoniculum, 404, 405, 406 



griseum, 404, 405, 406 



hunteri, 405, 406 



jacumbae, 405, 406 



latipes, 404, 405, 406 



meridionale, 405, 406 



piperi, 405, 406 



pugetense, 404, 405, 406 



trivittatum, 404, 405, 406 



tuberosum, 405, 406 



venator, 404, 405, 406 



venustum, 405, 406 



virgatum, 404, 405, 406 



vittatum, 404, 405, 406 

 Sinella, 77 



hoftii, 77 

 Siphlonisca, 89, 90 

 Siphlonurinae, 89 



key to genera: adults, 89; nymphs, 89 

 Siphlonurus, 89, 90 

 key to species: adults, nymphs, 

 females, 91 



berenice, 83 



columbianus, 91 



occidentalis, 91 



spectabilis, 91 

 Siphloplecton, 105 

 Sisyra, 234 



vicaria, 236 

 Sisyridae, 234 

 key to'genera: adults, pupae, larvae, 

 236 

 Sisyridivora 



cavigena, 235 

 Sitona, 325 

 Skwala, 174 



Small water striders, 215 

 Smicridea, 250, 251, 252 



utico, 252 

 Smynthuridae, 75, 76 



key to genera: 77 

 Smynthurides, 78 

 key to species: 78 



aquaticus var. levanderi, 78 



sexpinnatus, 78 

 Smynthurinus, 78 

 key to species: 78 



aureus, 78 



elegans, 78 



quadrimaculatus, 78 



remotus, 78 

 Smynthurus, 78 

 Snake doctor, 106 

 Snake feeder, 106 

 Snipe flies, 443 

 Soliperla, 164 

 Somatochlora, 124, 125, 126, 128 



semicircularis, 128 

 Sostea, 354 

 Soyedina, 165, 167 

 Spercheidae, 326, 336 

 Spercheus, 336 

 Sperchopsis, 295, 338 

 Sphaeridiinae, 338 

 Sphaeridini, 338 

 Sphaeridium, 336, 339, 341 

 Sphaeriidae, 297 

 Sphaeromias, 426, 428 

 key to species: 435 



brevicornis, 435 



longipennis, 435 



minor, 435 

 Sphingidae, 271 

 Spilocryptus, 327 



incertus, 327 

 Spongilla flies, 234 

 Spongilla fragilis, 235 

 Spongillidae, 234 

 Springtails, 74 

 Stable fly, 479 

 Stactobiella, 254 



Staphylinidae, 293, 297, 298, 299, 331, 

 347 

 key to genera: adults, 348 

 Staphylinoidea, 299, 331, 346 

 Stempellina, 418 

 Stenelmis, 358, 360, 361 



calida, 357, 358, 361 



Stenochironomus, 409, 411, 412, 419 

 421 



colei, 422 



taeniapennis, 422 

 Stenocolus, 367 



scutellaris, 367 

 Stenoides, 271 

 Stenonema, 84, 85 

 Stenopelmus, 370 



rufinasus, 370 

 Stenotabanus, 445 

 Stenoxenini, 425, 435 

 Stenoxenus, 426 

 Stilobezzia, 425, 428, 435 

 key to species: adults, 435 



fuscula, 435 



pruinosa, 435 

 Stilobezziini, 425, 435 

 Stomach contents, fish, 63 

 Stoneflies, 155 

 Stonemyia, 444 

 key to species: 446 



abaureus, 446 



albomacula, 446 



ruficornis, 446 



tranquilla fera, 446 



velutina, 446 

 Stratiomyidae, 372, 374, 375, 377, 

 438 

 key to genera: adults, 438; larvae and 

 puparia, 439 

 Stratiomyinae, 439, 441 

 Stratiomys, 439 

 key to species: adults, 441 



barbata, 441 



currani, 441 



discaloides, 442 



griseata, 442 



laticeps, 441 



maculosa, 44 1 



melastoma, 441 



nevadae, 442 

 Streams, 9 

 classification, 7, 12, 15 

 habitats, 9 

 Strophopteryx, 171 

 Suphis, 325 

 Suphisellus, 325, 326 



levis, 326 



lineatus, 326 

 Suwallia, 177 

 Sweltsa, 178 



Symbiocladius, 408, 410, 412, 417 

 Sympetrum, 124, 125, 126, 131 

 key to species: males, 131; females, 

 133; naiads, 131 



atripes, 132, 133 



costiferum, 132, 133 



danae, 132, 133 



decisum, 132 



internum, 132, 133 



madidum, 132, 133 



obtrusum, 132, 133 



occidentale californicum, 132, 133 



pallipes, 132, 133 



rubicundulum, 132, 133 



scoticum, 132 

 Synclita, 271, 274, 277 



occidentalis, 277, 281, 282 

 Syndiamesa, 408, 410, 412 

 Syrphidae, 374, 376 

 keys to genera: adults, 461; larvae 

 and puparia, 461 

 Syrphinae, 460 

 Systenus, 449, 451, 454 





