Fig. 75.—Crotalus confluentus (Pacific or Mottled Rattle-Snake). (After Baird and Stejneger.)
Colour greyish-yellow to salmon-red, finely punctulated with brown, with a dorsal series of transverse darker spots; belly yellowish.
Total length, 1,020 millimetres; tail 90.
Habitat: Desert regions of Southern California, Lower California, and Arizona.
(8) C. triseriatus.—9-13 supralabials; scales in 21-25 rows, dorsals strongly keeled; 142-184 ventrals; 22-30 subcaudals.
Colour olive or brown, with a vertebral series of rather small dark brown spots edged with black and white; belly yellowish, spotted with dark brown, or dark grey-brown powdered with whitish.
Total length, 530 millimetres; tail 55.
Habitat: Mexico.
(9) C. polystictus.—Closely allied to the foregoing, but 4 internasals, 14 or 15 supralabials, and scales in 27-30 rows; 123-151 ventrals; 18-23 subcaudals.