232 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Petalognathus, 126. 



miiltifasciatus, 49, 50. 



nebulatus, 126. 

 petersii, Geophis, 66, 69, 209. 

 petolarius, Oxyrhopus, 103. 

 phenax, Eutaenia, 165. 



Thamnophis phenax, 159, 165, 215. 

 phenops, Leptotyphlops, 24. 



Leptotyphlops phenops, 20, 24, 204, 

 210, 212, 214, 215. 



Stenostoma, 24. 

 philippii, Leptognathus, 151. 



Tropidodipsas, 149, 151, 206, 213. 

 Phimothyra, 121. 



decurtata, 104. 



hexalepis, 123. 

 pholidostictus, Pituophis deppei, 107. 

 phrenitica, Tantilla, 135, 140, 211, 215. 

 Phrynonax, 114. 



guentheri, 114. 



poecilonotus poecilonotus, 114. 

 Phyllorhynchus, 8, 10, 16, 103, 104. 



browni, 103, 104. 



browni browni, 104. 



browni lucidus, 103. 



decurtatus decurtatus, 104, 203. 



decurtatus nubilis, 104, 213. 



decurtatus perkinsi, 104. 

 picadoi, Bothrops, 183. 



Trimeresurus nummifer, 183. 

 piceivittis, Coniophanes, 38, 41, 211. 

 piceum, Bascanium, 95. 

 piceus, Coluber flagellum, 95. 



Masticophis, 95. 



Masticophis flagelluna, 93, 95, 203, 

 213. 

 pictigaster, Agkistrodon mokeson, 177, 



178. 

 pictus, Glaphyrophis, 38. 

 piscivorus, Agkistrodon, 177. 

 Pituophis, 8-10, 16, 105. 



annectens, 106. 



catenifer affinis, 105, 106, 205, 213. 



catenifer annectens, 106, 203. 



catenifer deserticola, 106, 213. 



catenifer rutilis, 106. 



catenifer sayi, 105, 107, 205, 210, 

 214. 



catenifer stejnegeri, 106. 



deppei deppei, 105, 107, 203, 205, 



206, 208-212, 215. 



deppei jani, 105, 107, 205, 208, 210, 



214. 

 deppei lineaticoUis, 105, 108, 204, 



207, 209, 211, 215. 

 deppei pholidostictus, 107. 

 lineaticoUis, 108. 

 mexicanus, 107. 



sayi, 107. 



sayi affinis, 106. 



sayi sayi, 107. 



vertebralis, 105, 108, 203. 

 Pityophis affinis, 106. 



intermedins, 60. 

 plagosus, Conophis pulcher, 44. 



planiceps, Coluber, 141. 



Tantilla, 136, 141, 203. 

 Plastoseryx bronni, 27. 

 platura, Anguis, 176. 

 platurus, Hydrophis, 176, 177. 



Hvdrus, 176. 



Pelamis, 176, 177, 203, 206-208, 



210, 213. 

 platyrhinos, Heterodon, 71. 

 pleurostictus, Elaphis, 107. 

 Pliocercus, 8, 10, 14, 108, 109. 



aequalis, 109, 110. 



andrewsi, 109, 110, 216. 



bicolor, 109, 110, 212, 215. 



elapoides, 109, 110. 



elapoides celatus, 109, 111, 214. 



elapoides diastemus, 109, 111, 204, 



211. 

 elapoides elapoides, 109, 110, 211, 



212, 214, 215. 

 elapoides laticollaris, 109, 111, 214. 

 elapoides schmidti, 110, 111, 204, 



216. 

 elapoides semicinctus. 111. 

 plorator, Ninia diademata, 99, 100, 207. 

 plumbeus, Coluber, 35. 

 poecilonotus, Phrynonax poecilonotus, 

 114. 

 Pseustes poecilonotus, 114, 216. 

 Spilotes, 114. 

 polysticta, Caudisona, 193. 

 Leptodeira, 87. 



Leptodeira annulata, 86, 87, 204,. 

 206, 208-212, 214, 216. 

 polystictus, Crotalus, 185, 193, 207, 208, 



215, 216. 

 polyzona, Lampropeltis, 84. 



Lampropeltis triangulum, 78, 84, 



211, 214, 215. 

 poppigi, Geophis, 65. 

 Porthidium, 179. 



postremus, Thamnophis eques, 161, 



162, 209. 

 potosiensis, Oxybelis, 102, 103, 212. 

 praelongus, Typhlops, 19. 

 praeocularis, Eutaenia, 168. 

 Thamnophis, 168. 

 Thamnophis sumichrasti, 160, 168, 



212, 216. 



praestans, Leptophis occidentalis, 90, 

 91, 207, 214-216. 



Thrasops, 91. 

 pricei, Crotalus, 197. 



Crotalus pricei, 196. 



Crotalus triseriatus, 186, 197, 205, 

 206, 214. 

 Procinura, 7, 10, 15, 35, 111. 



aemula, 112, 205. 

 proterops, Coniophanes, 40. 



Coniophanes fissidens, 39, 40, 215. 

 proximus. Coluber, 166. 



Thamnophis sauritus, 158, 166, 205, 

 210, 213-215. 

 Prymnomiodon, 158. 



chalceus, 166. 

 Psammophis flavi-gularis, 96. 



