. Bulletin - United States National Museum. Science. 12 GENERIC KEY scale rows fewer than 2/ 163 Dorsal scale rows 2] or more P i tuoph i s fewer than I75 Thamnophis Ventrals more than 1/5 Pseustes maxillary teeth enlarged but w i thout grooves Leptooh i s Posteriormost maxillary teeth not or slightly enlarged, with groove present but located laterally on tooth Oxybel i s l65«A'"ea behind eye covered by many small scales 166 Area behind eye covered by several large plates Elaphe sensory pits in most if not all upper labials 171 No sensory
. Bulletin - United States National Museum. Science. 12 GENERIC KEY scale rows fewer than 2/ 163 Dorsal scale rows 2] or more P i tuoph i s fewer than I75 Thamnophis Ventrals more than 1/5 Pseustes maxillary teeth enlarged but w i thout grooves Leptooh i s Posteriormost maxillary teeth not or slightly enlarged, with groove present but located laterally on tooth Oxybel i s l65«A'"ea behind eye covered by many small scales 166 Area behind eye covered by several large plates Elaphe sensory pits in most if not all upper labials 171 No sensory pits in labials 167 si ngle 168 Subcaudals pa ired Loxocemus smooth 16^ Some or all scales keeled Trachvboa l65»Dorsum of head with some enlarged plates I7O Dorsum of head covered by small scales, no enlarged plates on snout Boa shields posterior to paired internasals and paired prefrontals; body scale rows more than 40 Ep icra tes Dorsum of head with regular plates, including azygous prefrontal, frontal and parietal; scale rows fewer than 40 Ungal i oph i s scale rows fewer than 36 Xenoboa Midbody scale rows more than 36 172 de escamas dorsales menos de 27 I63 Hileras de escamas dorsales 27 0 mas--P i tuoph i s 163. Ventrales menos de 175 Thamnoph is Ventrales mas de 175 Pseustes maxilares posteriores agrandados pero s i n surcos Leptoph i s Dientes maxilares posteriores no o ligeramente agrandados, con surco situado a lateral del d iente Oxybel is detras del ojo cubierta de muchas escamas ch icas 166 Area detras del ojo cubierta de varias laminas grandes Elaphe sensoriales profundas en la mayor'a 0 en todas las labiales superiores I7I Sin fosetas sensoriales en labiales 167 167. Subcaudales de a una 168 Subcaudales en pares Loxocemus 1 isas 169 Algunas 0 todas las escamas quilladas Trachyboa l69'Dorso de la cabeza con algunas laminas agrandadas 17" Dorso de la cabeza
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
