48. CROTALUS 959 
27 rows, all keeled except the first two or three rows. Gas- 
trosteges varying in number from 145 to 160. Anal not 
divided. Urosteges 21 to 28, a few of the anterior and post- 
erior sometimes divided. 
The coloration of the original specimen was described by 
Dr. Meek as follows: 
Color light olive brown, more or less irregularly blotch- 
ed with white; dorsal region crossed by 19 lighter bands, 
each one scale length in width and narrowly margined with 
black; dorsal transverse bars about nine scale lengths apart; 
no transverse bands on tail; ventral surface much speckled 
and mottled with black, becoming darker posteriorly; small 
black dots on sides, these most numerous near ventral region; 
supraocular light ash color; a large ashy blotch on occiput 
more or less reticulated posteriorly with darker; snout and 
region between supraoculars olive brown; a distinct white 
line one scale wide from upper edge of prenasal above pit 
to upper edge of seventh supralabial, passing obliquely down- 
ward to tenth supralabial and backward covering the last 
four supralabials; a white line on lower half of first five 
supralabials, passing downward and backward on lower jaw 
to white on throat; the space between these bands brown; 
rostral with white median line. 
The second known specimen, as described by Mr. Hart- 
man, was in “general color chocolate, dorsally marked with 
short cross-bars of dark shading into a black line posteriorly 
or anteriorly, these bars sometimes occurring in pairs and 
then separated by one or two scales’ width of ground color; 
tail with three distinct brown half rings on anterior part, 
remainder uniform brown dorsally; brown spots covering 
parts or all of from one to four scales laterally; whole body 
more or less speckled with black or brown; lateral scales 
covered with fine specks; ventrals of anterior portion almost 
white, posteriorly becoming slightly speckled with dark, the 
