? ▁A ▁Field ▁Guide ▁to ▁the ▁Sn akes ▁of ▁the ▁United ▁States ▁East ▁of ▁the ▁Rock y ▁Mountains . ▁( With ▁ 1 0 8 ▁draw ings ▁by ▁Ed mond ▁Mal n ate ). ▁New ▁York ▁and ▁London : ▁D . ▁App leton - Cent ury ▁Company . ▁Front is pe ice ▁map ▁+ ▁v iii ▁+ ▁ 1 6 3 ▁pp . ▁+ ▁Pl ates ▁A - C , ▁ 1 - 3 2 . ▁( S istr urus ▁mil i arius , ▁pp . ▁ 1 4 3 - 1 4 5 ▁+ ▁Pl ate ▁ 2 9 , ▁figures ▁ 8 4 A , ▁ 8 4 B ; ▁Pl ate ▁ 3 0 , ▁figure ▁ 8 5 ). ▁Hub bs , ▁Brian ; ▁O ' Con nor , ▁Br end an ▁( 2 0 1 2 ). ▁A ▁Guide ▁to ▁the ▁R att les n akes ▁and ▁other ▁Ven om ous ▁Ser p ents ▁of ▁the ▁United ▁States . ▁Tem pe , ▁Arizona : ▁Tr icol or ▁Books . 1 2 9 ▁pp . ▁. ▁( S istr urus ▁mil i arius , ▁pp . ▁ 7 8 - 8 5 ). ▁Lin na eus ▁C ▁( 1 7 6 6 ). ▁System a ▁natur æ ▁per ▁reg na ▁t ria ▁natur æ , ▁sec und um ▁classes , ▁ord ines , ▁gener a , ▁species , ▁cum ▁character ibus , ▁difer enti is , ▁syn onym is , ▁loc is . ▁Tom us ▁I . ▁Edit io