300 INDEX. 



Key to species 165 



robusta 166 



duzeei, Idiocerus 69 



Economic importance 10 



Egg-deposition 22 



Empoasca 239 



albolinea 241 



alboneura 241 



flavescens 244 



Key to species 239 



mali 242 



obtusa 240 



trifasciata 240 



erythrocephala, Macropsis 74 



Erythroneura 248 



basalaris 250 



comes 254 



comes var. coloradensis 258 



comes var. infuscata 257 



comes var. vitis 257 



comes var. ziczac 256 



crevecoeuri 254 



dorsalis 260 



fumida 260 



illinoiensis 251 



Key to species ' 248 



maculata 252 



obliqua 258 



obliqua var. noevus 259 



nigra 262 



rubroscuta 251 



scutelleris 253 



tricincta 249 



vulnerata 261 



Eugnathodus 234 



abdominalis 234 



Eupteryx 245 



Euscelis 167 



anthracinus 173 



bicolor 177 



comma 175 



curtisii 176 



exitiosus 169 



extrusus 172 



Key to species 167 



magnus 168 



obtutus 178 



parallelus 171 



striatulus 174 



striolus 170 



uhleri 173 



Eutettix 179 



albidus 185 



cinctus 184 



Key to species 179 



pictus 180 



seminudus 181 



strobi 182 



tenellus 180 



excultus, Phlepsius 194 



exitiosus, Euscelis 1 9 



