260 



INDEX. 



Page. 



Master snake 49 



mexicana 6,7,17,245,249,250,251 



mexicanus 245 



microphoUs 5, 6, 11, 15, 139, 140, 142, 143, 



145, 146, 149, 155, 163, 200, 237 et seq., 251, 254 



Milk- snake 75,188,193 



Moccasin, House 188 



Molecatcher 128 



multicincta 7, 11, 106, 168, 221, 222, 



226, 227, 233, 234, 237, 243, 244, 215, 249 et seq. 



multicinctus 222 



multifasciata 222 



multistrata 165, 202 



multistratus 155, 165 



multistriata 165 



Mutation 99, 100 



Natrix doliatus 206 



nelsoni 142,143,145,146,155, 



162, 163, 172, 221, 233, 237 et seq., 250, 251, 252 



niger 12, 38, 39, 43, 51, 58, 104 et seq., 252 



nitida 92,96,100,103,105,115 



obsoleta, Elaphe 10 



occipitalis 159 



oligozona 140, 155 



Ophibolus 4, 5 



Osceola 4 



parallelus 172, 173 



Penial characters (see also description of each 



form) 7 



Penis: 



in caUigaster group 17 



in getulus group 17, 108-109 



in Lampropeltis 7 



in triangulum group 17 



Pituophis sayi 34 



polyzona 11, 139, 149, 151, 152, 155, 156, 



161, 162, 163, 221, 237 et seq., 250, 251, 252, 2.54 



polyzouus 139,140,149 



Pseudoelaps Y 188 



pseudogetulus 75 



pyromelanus 231 



pyromelas 231 



pyrrhomelaena 5, 6, 7, 11, 15, 163, 166, 223, 



226, 231, 237, 243, 244, 245, 249, 250, 251, 253 



pyrrhomelas 231 



Rattlesnake pilot 49 



Red king snake 206 



Red milk snake 179, 222 



Red snake 179 



Ring snake 222 



rhomboniaculata 5,8, 



12, 15, 117, 119, 120, 124, 128^ 



138, 139, 163, 250, 251, 254 



rhombomacalatus 116, 128 



Page. 



rathveni 221, 227,237,245,250 



sayi 25,33,34,43 



sayi, Pituophis 34 



Say's king snake 33 



Scale rows: 



formulae of 10-12,25 



variation of, in genus 9 



Scarlet kind snake 206 



Scotophis 116 



Sex, to distinguish 6 



Speckled king snake 33 



Sphenophis 4 



splendida 7, 26, 35, 38, 39, 44, 66 



67, 68, 69, 73, 83, 104 et seq., 240, 250, 252 



spendidus 26 



Spotted adder 188 



Spotted king snake 33 



Summary: 



calUgaster group 138 



characteristics of genus 24, 25 



general summary 249 



getulus group 104 



triangulum group 237 



syspila 168, 



169, 172, 173, 175, 176, 1 79, 184, 192, 194, 197, 

 198,200,201,202,212,237 et seq., 252,253 



syspilus 179 



sysputus 165 



Tail length, proportionate 24 



temporalis 190,202 



Temporals, variation of, in genus 15, 24 



Thamnophis 8, 9, 10 



Thunder and lightning snake 49 



Thunder snake 49,206 



tigrina 116 



triangula 188, 189 



triangulum 6, 7, 



11, 15, 163, 168, 175, 181, 183, 184, 185, 188, 

 210, 212, 219, 237 et seq., 251, 252, 253, 254 



triangulum group 1,6, 



13, 16, 17, 108, 139, 247, 249-254 



map of 238 



summary of 237 



triangulus 188,189,190 



Ventrals, variation of in genus 15, 24 



virginiana 5, 8, 10, 15, 172, 200, 209, 217, 237, 251 



Wamper 49 



Wampum snake 49 



Yellow-bellied king snake 115 



Y, Pseudoelaps 188 



yumensis 7, 28, 



29, 30, 66, 76, 77, 80 et seq., 99, 103, 104 et seq. 



zonata 222 



zonatus 139, 222, 231 



zonatus, Bellophis 4 



o 



