275 



Page 

 assaracus MacGillivray, Mono- 



phadnus 253 



asslmilis Malloch, Agromyza. . .. 193 



Asteromyia Pelt 180 



agrostis Osten Sacken 180 



muhlrnberf/iae (Marten).... 180 



Astichus Foerster 222 



bimaculatipennis Girault . . . 222 



Astochus MacGillivray 237 



aldrichi MacGillivray 237 



petcheri MacGillivray 237 



aterrima Malloch, Galgupha.... 148 



aterrima Malloch, Tiphia 229 



aterrima Vau der Wulp, Pogono- 



myia 207 



athene McAtee, Typhlocyba 151 



atra MacGillivray, Messa 270 



atra Malloch, Porbesomyia 180 



atracornus MacGillivray, Mono- 



phadnus 253 



atracostus MacGillivray, Tenth- 

 redo 261 



atrata MacGillivray, Blenno- 



campa 238 



atrata MacGillivray, Pontania. .. 256 

 atratum MacGillivray, Isiodyc- 



tlum (sic) 249 



atravenus MacGillivray, Tenth- 

 redo 262 



atrifrons Malloch, Gimnomera. . 185 

 atruna MacGillivray, Phrontos- 



oma 256 



attenuata Malloch, Hylemyia 201 



Aulacidea Ashmead 215 



bicolor (Gillette) 215 



solidaginis (Girault) 215 



tumida Bassett 215 



aulatus MacGillivray, Amaurone- 



matus 269 



Aulax Hartig 215 



bicolor Gillette 215 



aurea Malloch, Forcipomyia. . . . 171 

 aurifrons Malloch, Schoenomyza 208 



australis Metcalf, Herpis 153 



Aylax Hartig 214 



bicolor (Gillette) 214 



gilletti Kiefter 214 



laciniatus (Gillette) 214 



■minor (Gillette) 214 



rufus (Gillette) 214 



B 



badia (Bassett), Callirhytis 215 



Baetis Leach 144 



harti McDunnough 144 



pallidula McDunnough 144 



Page 



bakeri MacGillivray, Neocharac- 



tus 254 



bakeri Rohwer, Euura 248 



balanata MacGillivray, Itycor- 



sia 235 



balata MacGillivray, Itycorsia.. 235 

 ballista MacGillivray, Itycorsia. 235 



banksi Malloch. Andrena 231 



basalis Malloch, Chii-onomus. ... 164 



basalis Walker, Ceresa 149 



basiseta Malloch. Phaonia 206 



Bassus Fabricius 211 



acrobasidis Cushman 211 



Beckerina Malloch 184 



luteola Malloch 184 



beeriana Bird, Papaipema 162 



behrensaria Hulst, Aspilates. . . . 161 

 bellula MacGillivray, Macrophya 



250 



bellulus Melander, Nemotelus. . . 182 

 bethunei MacGillivray, Metallus 251 

 bethunei Sanders, Hoplogryon.. 213 



Bezzia Kiefter 163 



albidorsata Malloch 163 



apicata Malloch 163 



cockerelli Malloch 163 



dentata Malloch 163 



flavitarsis Malloch 163 



Bibionidae 180 



bicaudata Malloch, Hylemyia... 201 

 bicolor Gillette, Antistrophus. . . 214 



bicolor Gillette, Aulax 215 



bicolor Girault, Uscanella 225 



bicolor MacGillivray, Macro- 



xyela 234 



bicolor Metcalf, Bruchomorpha. . 152 

 bicolor Norton. Trichiosoma. . . . 268 



bicolorata Malloch, Aricia 197 



bicornis MacGillivray, Macrem- 



phytus 250 



bicruciata Malloch, Hylemyia. . . 201 

 bifasciatipennls Girault, Sticho- 



thrix 229 



bifasciatus Malloch. Orthocladi- 



us 173 



Bigotomyia Malloch 197 



californiensis Malloch 197 



bilineata MacGillivray, Macro- 

 phya 250.269 



bilineatus MacGillivray, Tenth- 

 redo 262 



hiniaculata Woodworth, Gypona. 151 

 bimaculatipennis Girault, Asti- 

 chus 222 



bipartita Cresson, Selandria 260 



