Oak Beauty, 300. _Plates_ 127, 128 Oak-tree Pug, 248. _Plate_ 99 Oblique Carpet, 257. _Plate_ 102 Oblique Striped, 146. _Plate_ 54 Ochreous Pug, 226. _Plate_ 96 _Ochria aurago_, 18. _Plate_ 10 _Ochyria._ See _Coremia_. _Odezia atrata_, 147. _Plate_ 55 Olive, 9. _Plate_ 4 Olive Crescent, 88. _Plate_ 36 _Omphaloscelis lunosa_, 11. _Plate_ 7 _Ophiusa stolida_, 77 _Opisthograptis luteolata_, 283. _Plate_ 117 _Oporabia autumnata_, 189, _Plate_ 78; _dilutata_, 188, _Plates_ 76, 78; _filigrammaria_, 190, _Plate_ 77 Orange Moth, 280. _Plates_ 117, 118 Orange Sallow, 17. _Plate_ 10 Orange Swift, 361. _Plates_ 157, 159 Orange-tailed Clearwing, 353. _Plate_ 156 Orange Underwing, 97. _Plates_ 38, 39 Orange Upperwing, 22. _Plates_ 6, 10 _Orrhodia erythrocephala_, 23, _Plate_ 11; _ligula_, 25, _Plate_ 11; _rubiginea_, 26, _Plates_ 6, 11; _vaccinii_, 24, _Plate_ 11 _Ortholitha bipunctaria_, 145, _Plates_ 52, 54; _cervinata_, 143, _Plates_ 52, 54; _limitata_, 144, _Plates_ 52, 54; _moeniata_, 145; _plumbaria_, 143, _Plate_ 54 _Orthosia._ See _Amathes_. _Ourapteryx sambucaria_, 282. _Plates_ 117, 118 _Pachycnema hippocastanaria_, 318. _Plates_ 137, 140 _Pachys betularia_, 301, _Plates_ 128, 129; _strataria_, 300, _Plates_ 127, 128 Pale Brindled Beauty, 295. _Plates_ 122, 126 Pale-lemon Sallow, 22. _Plate_ 10 Pale Oak Beauty, 309. _Plate_ 135 Pale Pinion, 29. _Plate_ 12 Pale Shoulder, 53. _Plate_ 19 _Parascotia fuliginaria_, 86. _Plate_ 36 Peacock, 287. _Plate_ 119 Pease Blossom, 47. _Plate_ 17 _Pechypogon barbalis_, 91. _Plate_ 35 _Pelurga comitata_, 254. _Plate_ 102 Peppered Moth, 301. _Plates_ 128, 129 _Percnoptilota fluviata_, 258. _Plate_ 102 _Perconia strigillaria_, 332. _Plate_ 144 _Perizoma affinitata_, 205, _Plate_ 83; _albulata_, 208, _Plates_ 83, 84; _alchemillata_, 206, _Plate_ 83; _blandiata_, 210, _Plate_ 83; _bifasciata_, 208, _Plate_ 83; _flavofasciata_, 207, _Plate_ 85; _minorata_, 209, _Plate_ 83; _taeniata_, 211, _Plate_ 85 _Phasiane petraria_, 327. _Plate_ 143 _Phibalapteryx lapidata_, 255, _Plate_ 102; _polygrammata_, 256, _Plate_ 102; _tersata_, 257, _Plate_ 102; _vitalbata_, 256, _Plate_ 102 _Phigalia pedaria_, 295. _Plates_ 122, 126 _Philereme._ See _Scotosia_. Phoenix, 164. _Plates_ 63, 67 _Phragmataecia castaneae_, 349. _Plate_ 153 Pimpinel Pug, 228. _Plate_ 95 Pine Carpet, 176. _Plates_ 70, 71 Pinion-spotted Pug, 226. _Plate_ 96 Pinion-streaked Snout, 95. _Plate_ 36 Pink-barred Sallow, 19. _Plates_ 6, 10 Plain Golden Y, 69. _Plate_ 24 Plain Pug, 237. _Plates_ 94, 97 Plain Wave, 119. _Plates_ 46, 47 _Plastenis retusa_, 9, _Plate_ 4; _subtusa_, 9, _Plate_ 4 _Plusia bractea_, 67, _Plate_ 24; _chrysitis_, 65, _Plate_ 22; _chryson_, 66, _Plate_ 24; _festucae_, 68, _Plate_ 24; _gamma_, 72, _Plate_ 26;