INDEX 



XI 



nebulosus (Hoplisoides) 115 



Xeduba 227 



neglecta (Mydaea) Malloch 136 



nehawkae (Myrmecophila) 



108, 109, 110 



Neobarrettia 240 



Neodexiopsis Malloch 162 



neogagates (Formica) 95, 107 



neopoeciloptera (Helina) Mal- 

 loch 139 



Neotoma 247 



Nephrotoma 22 



(see also bifusca, contrast a, 

 geminata, palloris, pullata, 

 quadrifaria and virgata) 



Neuroctena 29, 30, 31, 34, 86 



(see also analis, fimiida 

 and simplex) 



niger (Erythronem-a) 272, 274 



niger (Lasius) "95, 107 



niger (Typhlocyba) 274, 275 



nigerrima (Hydrophoria) Mal- 

 loch ' 169 



nigerrima (Erj-throneura) 



McAtee 272, 275 



nigribasis (Helina) Malloch 143 



144 



nigricans (Arenivaga) 201 



nigricans (Homoeogamia) 201 



nigridorsum (Tyjihlocyba) .... 274 



nigrimana (Sciomj'za) 38 



nigrita (Helina) Malloch 139 



nipponensis (Rliamphidia) .... 8 



nivea (Coenosia) 165 



nodosa (Didineis) 128, 129 



noeAais (Erythroneura) .... 276, 280 



noe^'us (Typhlocyba) 280 



nov.'ie-angliae (Limnophora) 



Malloch 151, 152 



nubeculosa (Lininobia) 6 



nuda (Hydrophoria) 172 



nudata (Erythroneura) McAke 



312, 316 



Nysson 122 



(key to certain North Am- 

 erican species) 122 



(see also albomarginatus, 

 aurobalteatus, basilaris, 



bellus, clarconis, cressoni, 

 gagates, intermedins, ma- 

 culipes, mellipes, meta- 

 thoracicus, moestus, opul- 

 entus, pumilus, recticornis, 

 rusticus, Seminole, simplic- 

 icornis, sphecodoides, svib- 

 mellipes, texanus, tra- 

 mosericus, trichrus and 

 tristis) 



Obliqua (Erythroneura). . .270, 275 

 276, 277, 285 



obliqua (Tettigonia) 275 



obliterata (Rhamphidia) Alex- 

 ander 7 



obscura (Prenolepis) 95, 104 



obsoleta (Limnophora) Mal- 

 loch 149, 150, 153 



obtusa (Melina) 44 



obtusa (Sciomyza) 43, 44 



obtusus (Ejjigomphus) .... 324, 330 



350 

 occidentalis (Hydrophoria) 



Malloch... \ 170 



occidentalis (Hylemyia) Mal- 

 loch 191 



occidentalis (Mydaea) Mal- 

 loch 134 



Ootogomphus (see specularis) 

 octo-notata(Erythroncvu'a) 311, 317 



Odeoparea 31 



Oedaleonotus (see borckii, ori- 



entis and pacificus) 

 Oedoparea (see glauca) 



Oidematops Cresson 31, 35, 36 



(see also ferruginea) 



Oidematopsini 35 



olamentke (Melanoplus) Hc))- 



ard 391 



oldenbergi (Dichrochira) 39 



oppositus (Alysson) 130 



opulentus (Brachystegus) 126 



opulentus (Nysson) 123, 126 



Orchesticus 244 



oregonensis (Myrmecophila).. 92, 93 



94, 95, 96, 97, 98, 100 



105, 106, 107 



