OPHrniA OROTALIDAE CAUDISONA EDWARDSIf. 



531 



CROTALUS MOLOSSTJS, Baird & Girard. 



Crotalm molossus, BAIRD & GIRARD, Cat. N. A. Kept., pt. i, Serp., 1853,10. BD., U. 



S. & Mex. Bound. Surv., ii, Kept., 1859, 14, pi. 11. COPE, Check-List N. A. 



Batrach. & Kept,, 1875, 33. 

 Crotalus ornatus, HALLOW., Proc. Acad. Nat. Sci. Phila., vii, 1854, 102. Id., P. R. R. 



Rep., x, 1859, 23. 

 Caudisona molossus, Mitchell's Res., 1861, 124. COPE, Proc. Acad. Nat. Sci. Phila., 



18G6, 307-308. 



HAB. Sonoran Region, entering Texas District. 



Apparently as rare as the preceding species. Attains a large size. 



Genus CAUDISONA, Laurenti. 

 CAUDISONA EDWARDSII, Baird & Girard. 



Crotalophorus cdivardsii, BAIRD & GIRARD, Cat. N. A. Rept., pt. i, Serp., 1853, 15. 



BD., U. S. & Mex. Bound. Surv., ii, Reptiles, 1859, 15. 

 Caudisona cdwardsii, COPE, Check-List N. A. Batrach. & Rept., 1875, 34. 



HAB. Sonorau District. 



This beautiful species has been met with but in one instance by the 

 collectors of the expedition. 



