1901.] :SATUKAL SCIENCES OF PHILADELPHIA. 105 



Grayish or yellowish brown, with a dorsal series of subquadrate 

 dark brown blotches with rather lighter centres, and soractiraos 

 a yellowish border; the corners are often rounded, and posteriorly 

 the spots become cross-l)ands; two series of smaller alternating 

 blotches on the sides; belly dull yellow; a transverse light line on 

 the centi'e of the supraoculars, which Avidens and sometimes 

 bifurcates internally; in the young this is very distinct and the 

 anterior arm of the bifurcation is continued across the vertex to 

 meet its fellow ; the oblique eye streak begins very constantly at 

 the lower anterior corner of the eye and is bordered by narrow 

 white lines; alight line below loreal pit, and the borders of the 

 rostral are light in the young. 



Examination of the type of C. e. pulvernlentus Cope does not 

 afford any good ground for distinction. 



Hab. — Southern Manitoba to central Texas; west to Idaho and 

 Arizona. 



Crotalus oregonus Holbrook. 



No. Am. Herp., Ill, 21, PI. 3 (1842); C. lucifer and C. oregonus B. and 

 G., I. c, 6, 145; O. a. adamanteus (synonomy), C confluentus lecontii 

 and C. c. lucifer Cope, I. c, 690, 692 ; C. conflaeittiis (part) Boul., 

 I. c, III, 576 ; C. lucifer Stej., I. c, 445, and No. Am. Fauna, No. 7, 

 218 ; Van Den., I. c, 216 ; C. c. lecontei and C. c. lucifer Cope, Kep. 

 Nat. Mus , 1175, 1176. 



Examination of the type of C. oregonus Holb. leaves me with 

 little doubt that it is identical with lucifer B. and G. The speci- 

 men has become much distorted and shriveled during the sixty 

 years since Holbrook examined it, but it shows no important 

 difference in scutellation. There are 6 scales between the supra- 

 oculars; 3 between the suboculars and labials; 25 rows of scales. 

 Holbrook'? plate does not quite correctly render the color pattern; 

 the dark streak behind the eye begins further back than is shown, 

 and really takes origin as in lucifer, posterior to the centre of the 

 eye. The dorsal spots are not as emarginate on the anterior border 

 as many of them are represented in the plate; they are, in fact, 

 sharply angled, giving a superficial resemblance to adamanteus 

 (which can be the only reason why Cope includes it in the syn- 

 onomy of that species) ; but much weight cannot attach to this 

 single point in which the specimen differs from lucifer, for the 

 reason that the epidermis has long since peeled off, leaving the 

 whole pattern accentuated; and the youth of the animal (315 mm. 



