INDEX. 



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PAGE 



Pasipbte 95 



Pasites 81 



Pentagenia 247 



Pentaneura 282 



Peuthera 297 



Peuthetria 297 



Penthoptera 293 



Perdita 85 



Perditella 84 



Perditomorpha Ashmead 86 



Periconia 285 



Peripheroptera 288 



Perla 241 



americana Banks 243 



sabulosa Hanks 242 



Perlinella Banks 241, 242 



Phiarus 81 



Phileremulus 81 



Phileremus 81 



Pbilopotaiuus barrettee Banks 259 



Philoxantlius 84 



Phthinia 276 



Platynopoda .... 71 



Platyura . . .274 



Plecia 296 



Plesiastina 274 



Podalarius 60 



Podunomus 283 



Pcecilostola 292 



Polycentropus variegatus Hanks. . . .259 



Polyderis 236 



glabrella 237 



testaoelimbata 237 



Polyniera 292 



Polymoria 290 



Potamorites virginica Banks 256 



Potamyia Banks 259 



Pristotrichia 90 



Probolseus 276 



Prosopis 96 



Protandrena 88 



Protostelis 79 



Psaenythia 88 



Pseudomelecta 66 



Pseudopanurgus 85 



Pseudopbeolus 80 



Pseudoperla 241 



Pseudosciara 277 



Pseudosrnia 75 



PAGE 



Psitbyrus 58 



Psocus barretti Banks 239 



Oregon us Banks 239 



Virginian us Banks 239 



Psopbora 279 



Psychoda 284 



Psyebopb.ena 282 



Pteronarcella Banks 241, 242 



Pteronarcys 241 



Ptiloglossa. 89 



Ptilogyna 285 



Ptychoptera 293 



Pyrrhonielectra Ashmead 66 



Revelieria 113. 143, 187 



californica Fall 144 



Rhamphida 289 



Rhathymus 67 



Rhipidia 288 



Rbophites 83 



Rhopbitoides 83 



Rbyacophila mexicana Hanks 259 



Rbynocbosciara 277 



Rhypbus 298 



Sabethes 281 



Sackeniella 298 



Saropoda 59 



Scatopse 294 



Schmiedeknechtia 81 



Sciara 277 



Sciopbila 275 



SprapteT 84 



Scrapteroides 85 



Serapis 78 



Shorriherria 71 



Sigmatomera 291 



Simulium 297 



Siplilurus 247 



Spaniotoma 282 



Spbecodes 93 



Sphecodogaster Ashmead 92 



Spbecopbala 89 



Spinoliella Ashmead 84 



Steganoinns 77 



Stelidomorpha 80 



Stelis SO 



Stenophylaz antennatus Banks . . . 254 



pacificus Banks 25 1 



Stenotritus 90 



Stilpnosoma 96 



