910 16. CROTALIDE 
i.—Light postocular line one scale wide; dark 
postocular band arising below anterior 
corner of eye. 
C. confluentus.—p. 926. 
i.—Light postocular line, if present, more 
than one scale wide; dark postocular band, 
if distinct, arising below middle of eye. 
j.—Not from southern Lower California; 
lateral spots not so well defined; color- 
ation much less ornate. 
C. oreganus.—p. 930. 
j.—Cape Region of Lower California; 
lateral spots darker brown in greater 
contrast; coloration more ornate. 
C. enyo.—p. 945. 
h’.—Gastrosteges fewer (145 to 160); a verti- 
cal white line across middle of rostral, con- 
tinuing onto lower jaw and expanding be- 
tween two wide dark bars which extend 
about halfway back on the lower jaw; two 
white lines on side of head. 
C. willardi.—p. 958. 
g .—Rostral wider than high; dark markings more 
or less indefinite, cross-banded posteriorly. 
C. tigris.—p. 947. 
fff’—Dorsal blotches small, in two series. 
C. pricei—p. 963. 
ee.—lIntervals between dorsal dark blotches much 
greater than length of blotches along midline. 
C. lepidus.—p. 961. 
b.—Outer edge of supraocular plate, raised into a horn- 
like process. 
C. cerastes.—p. 953. 
a’.—Rostral separated from anterior nasal by granular scales. 
C. mitchellii—p. 949. 
