INDEX 



The names of new genera and of new species are followed by the name of 

 the author. 



PAGE 



Abdominalis (Pachybrachys) 



313, 353 



aberrans (Xiphidium) 235 



acronyctoides (Pucialia) Schaus 4 

 aeneipennis (Metriotes) Bow- 

 ditch 506 



Afrida polyglotta Schaus 1 



sceletozona Schaus 1 



agile (Orchelimum) 24, 27, 29 



agilis (Locusta) 15, 29 



aigialus (Conocephalus) Rehn 



and Hebard 164, 202 



alacris (Pachybrachys) Fall 314, 366 



alaskensis (Rhyssa) 142 



albiapicata (Titya) Schaus. ... 6 



albomaculata (Rhyssa) 142 



allardi (Conocephalus) .... 161, 169 



allardi (Xiphidion) 169 



alticola (Pachybrachys) Fall 



321,442 

 amabilis (Chlorhoda) Schaus . . 3 

 Amphorophora subterrans Wil- 

 son 99 



analis (Pachybrachys) Fall 309, 331 

 Anarthropus Rehn and Hebard 



159,165,216,226 

 angustifrons (Conocephalus) 



231,260 



angustifrons (Xiphidium) 260 



Anisoptcra 155 



Apechoncura (key to North 



American species) 148 



carinifrons 149 



nigritarsis 1 42 



Aphauropus Rehn and Hebard 



226, 234, 286 



Aphis art emesicola 88, 95 



chrysothamni Wilson 101 



frigichie 88, 95 



PAGE 



Aphis hermistonii Wilson .... 88, 93 



lithospermii Wilson 100 



oregonensis Wilson 88, 92 



reticulata Wilson 88, 92 



trident at ae Wilson 88, 94 



aphrodite (Dii-phia) Schaus. ... 9 

 apicaHs (Tetragonotes) Bow- 

 ditch 492 



apicatus (Cerichrestis) Bow- 

 ditch 504 



aquilonis (Pachybrachys) Fall 



315, 375, 480 

 arizonensis (Pachybrachys) 311, 344 



Aq:)ema ScJiaus 5 



megalopia Schaus 5 



arpi (Repnoa) Schaus 9 



artemesiae (Chaitophorus) .... 90 

 artemesiae (Microsiphum) ... 88, 90 

 artemesiae (Nectarophora). . . . 97 



art emesicola (Aphis) 88, 95 



artemesicola (Macrosiphum) 89, 96 

 atomarius (Pachybrachys) 



319,325,413,480 



atrata (Ichneumon) 128 



atrata (Megarhyssa) . . 125, 126, 128 



attenuatum (Xiphidium) 207 



attenuatus (Conocephalus) 165, 207 

 autolycus (Pachybrachys) Fall 



322, 458 



Radius (Pachybrachys) Fall 318, 404 

 bajulus (Pachybrachys) . . .318, 408 



barbara (Pharga) Schaus 5 



bituberculatum (Xiphidium). . 13 

 bivit t a1 us (Pachybrachys) 



322, 447, 480 

 blerura (Misogada) Schaus. ... 6 

 bolivianus (HomotjTshus) Bou- 



ditch 496 



