134 



Keij to Families of North American Insects. 



Notiphila, 71 

 Notodontidse, 52 

 Notoglossa, 27 

 Notolophus, 55 

 Notonectidae, 77 

 Notoxus, 39 

 Nycteolidse, 54 

 Nycteribiidse, 72 

 Nyctobates, 38 

 Nymphalidje, 60 

 Nymphipara, 66 

 Nyssonida;, 28, 29 



Ochteridae, 76 

 Ochthiphilida-, 72 

 Ocneria, 55 

 Ocj'pteridse, 68 

 Odinia, 71 

 Odonata, 43 

 Odontoceridse, 48 

 Odontophyes, 19 

 Odontota, 40 

 Odynerus, 26 

 (Ecanthus, 14 

 CEcophoridse, 59 

 ffidemasia, 52 

 Qildomeridae, 38 

 (Estridse, 67 

 Olbiogaster, 61 

 Olene, 55 

 Olethreutes, 57 

 Olfersia, 72 

 Olibrus, 33 

 Oligoneura, 42 

 Oligotomidse, 43 

 Olynthida;, 42 

 Omaloptera, 66 

 Omophron, 31 

 Omosita, 33 

 Omus, 31 

 Oncodidse, 64 

 Oncomyia, 66 

 Oncopeltis. 80 

 Onthophagus, 41 

 Oothecaria, 16 

 Ophion, 21 

 Opomyzidse, 71 

 Opostegidse, 55 

 Opsebius, 64 

 Orasema, 23 

 Orchesella, 83 

 Oreta, 53 

 Orgyia, 55 

 Ormenis, 74 

 Ormyrus, 23 

 Orneodidse, 49 

 Ornix, 57 

 Orphaephilidse, 62 



Ortalidida?, 70 

 Orthezia, 75 

 Orthocladius, 63 

 Orthogenya. 65 

 Orthoperidffi, 36 

 Orthoptera, 13 

 Orthopteroidea, 1 

 Oryssidse, 20 

 Oscinidse, 71 

 Osmia, 30 

 Ostomatida?. 33 

 Othniida?, 38 

 Otiocerus, 75 

 Otiorhynchidjp, 41 

 Oxybelidse, 27 

 Oxj-ptilus, 49 



Pachybrachys, 40 

 Pachyneuridse, 62 

 Pachyophthalmus, 68 

 Pachyrhina, 62 

 Packardia, 50 

 Pagasa, 78 

 Paleacrita, 52 

 Palloptera, 70 

 Palpicornia, 32 

 Pamphila, 59 

 Pamphiliidse, 19 

 Pangseus, 80 

 Panorpidse, 46 

 Panorpoidea, 3 

 Pantoclis, 24 

 Pantophthalmidte, 64 

 Panurgidse, 29 

 Papaipema, 54 

 Papilionidae, 60 

 PapiriidjB, 83 

 Paragus, 66 

 Parallelomma, 69 

 Paramesius, 24 

 Parandra, 40 

 Paraneuroptera, 43 

 Parasita, 18 

 Paratiphia, 26 

 Parnassiidse, 60 

 Parnidaj, 32 

 Parnopes, 25 

 Parydra, 71 

 Passaloecus, 28 

 Passalidse, 41 

 Paururus, 20 

 Pediculidse, 19 

 Pedilidffi, 39 

 Pelecinidse, 25 

 Pelidnota, 41 

 Pelocoris, 77 

 Pelogonidse, 76 

 Pelopffius, 28 



Peltis, 33 



Pemphredonidse, 28 

 Pentagrammaphila, 42 

 Pentarthron, 24 

 PentatomidiB, 80 

 Penthe, 39 

 Pepsis, 26 

 Peribalus, 80 

 Pericoma, 62 

 Pericopidse, 54 

 Peridroma, 54 

 Perilampidse, 23 

 Periplaneta, 16 

 Perlidae, 44 

 Perloidea, 3 

 Petrophora, 52 

 Phalacridse, 33 

 Phalonia, 58 

 Phasgonophora, 23 

 Phasgonuridae, 14 

 Phasmidse, 14 

 Phasiidffi, 67 

 Phengodes, 36 

 Philanthida-, 28 

 Philonthus, 32 

 Philopotamidae, 47 

 Philopteridae, 18 

 Philothermus, 37 

 Phleboptera, 19 

 Phlegethontius, 51 

 Phloeothripidse, 16 

 Pholus, 51 

 Phorantha, 67 

 Phorbia, 68 

 Phoridse, 65 

 Phorodon, 76 

 Phortica, 71 

 Photinus, 36 

 Photuris, 36 

 Phryganeidae, 47 

 Phryganidia, 52 

 Phryneidse, 61 

 Phthiraptera, 18 

 Phthirius, 19 

 Phthorimsea, 56 

 Phyciodes, 60 

 Phycltida;, 50 

 Phycodromidse, 69 

 Phyllobsnus, 35 

 Phyllocnistis, 55, 57 

 Phyllodromia, 16 

 Phylloxera, 76 

 Phymatids, 79 

 Physocephala, 66 

 Physopoda, 15 

 Phyto, 68 

 Phytomyzidse, 71 

 Phytonomus, 41 



