692 NORTH AMERICAN SNAKES COPE. 



Cephalic scales smallest ; eight rows between superciliaries ; four rows below orbit; 

 dorsal spots with light centers and brown borders light-edged or not ; headbands 

 obsolete; numerous posterior crossbands lecontei. 



Head scales small as in C. c. lecontei; colors dark ; dorsal spots and bands not pale- 

 centered and closer together than in C. c. lecontei; head wide, rounded., .liicifer. 



The distribution of these subspecies is as follows : The typical one in- 

 habits the plains, including also western Texas and southern California; 

 G. c. lecontei belongs to the Great Basin; the C.c. pulverulentus is a form 

 of the Sonoran district; while the C. c. lucifer inhabits the Pacific dis- 

 trict to its eastern limit, the northern Kocky Mountains. 



Crotalus confluentus confluentus Say. 



Cope, Proc. Acad. Phila., 1883, p. 11. 



Crotalus conjinentus Say, Long's Exped. Rocky Mts., il, 1823, p. 48; Bd. and Gird. 

 Cat. Serpt. 1853, N. Amer., p. 8; Baird, U. S. and P. R. R. Surv. Rept.,1859, 

 Whipple's Rept., p, 40; U. S. and Mex. Bound. Surv., Reptiles, p. 14; Cooper et 

 Suckley, Nat. Hist. Wash., 1859, Ter., p. 295. 



Icones. — Sitgreave's Exped. Colorado and Zuni, Tab. xvili, (icon, pej.), U. S. Pac. R. 

 R. Surv. Rept., Reptiles, Tab. xxiv, Eig. 4 ; Ibid., Williamson's Rept., Reptiles, 

 Tab. Ill ; Cooper and Suckley, Nat. Hist. Wash. Ter., Tab. xii. 



Central and Sonoran regions ; southern California. 



Crotalus confluentus pulverulentus Cope. 



Proc. Acad. Phila., 1883, p. 11. 

 Southern New Mexico. 



Crotalus confluentus lecontei Hallow. 



Crotalus lecontei Hallow., Proc. Acad. Nat. Sol. Phila., vi, 1852, p. 80; Rept. Exp. 

 Zuiii and Colorado River, Sitgreaves, p. 139, 1853; U. S. Pac. R. R. Rept., x; Wil- 

 liamson's Rept., 18.')9, p. 18. 



Crotalus confluentus lucifer Cope, Proc. Phila. Acad., 1883, p. 77. 



The Great Basin (Oregon to Arizona). 



Crotalus confluentus lucifer Bd. and Gird. 



Crotalus lucifer Bd. and Gird., Proc. Acad. Nat. Sci. Phila., 1852, p. 177, et (1853) 



Cat. p. 6, Girard, Herpetology, U. S. Expl. Exped. 1858, p. 187; Baird, IT. S. Pacif. 



R. R. Rept., x; Williamson's Rept., 1859, p. 10; Cooper et Suckley, Nat. Hist. 



Wash. Ter., 1859, p. 295. 

 Icones. — U. S. Pac. R. R. Surv. Rept., Williamson's Rept., Reptiles, Tab. xi; Girard, 



Herp., IT. S. Exp. ; Tab. XV, Figs. 1-6. 



Pacific Region. 



Crotalus lepidus Kenu. 



Crotalus lepidus Kennicott, Proc. Acad., Phila., 1861, Phila., p. 206; Cope, loc. cit. 



1873, p. 13. 

 Aploaspin lepida Cope, Report U. S. G. G. Surv. W. of 100th Mer., 1875, p. 535; Cope 



Check List Batr., Rept. N. Amer., p. 33. 



New Mexico ; south Arizona. 



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