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Show 1897.] LIZARDS O F T H E G E N U S SCELOPORUS. 499 Sceloporus rufidorsum, Yarrow, Proc. U.S. Nat. Mus. v. 1882, p. 442. Head-shields smooth ; frontal transversely divided and in contact with the interparietal; latter shield as long as broad or a little broader than long, much larger than the parietals l; a series of four or five large, transverse supraoculars, bordered inwards by an incomplete series of scales, the last two or three shields being in contact with the frontoparietals and parietals, and separated from the supraciliaries by one or two series of scales; two canthal scales; three to five long pointed scales on the anterior border of the ear, much larger than those in front of them. Dorsal scales much larger than ventrals, at least as long as broad, keeled, mucronate, entire or slightly denticulate, forming parallel longitudinal series ; 28 to 30 scales between the interparietal shield and the base of the tail; 5 or 6 scales, taken in the middle of the back, correspond to the length of the shielded part of the head. Lateral scales keeled, graduating into the dorsals and ventrals, directed obliquely upwards and backwards. Ventral scales small, smooth, bicuspid. 32-36 scales round the middle of the body. The adpressed hind limb reaches the ear or a little beyond; tibia longer than the shielded part of the head; the distance between the base of the fifth toe and the extremity of the fourth equals the distance between the end of the snout and the cervical pit. 17 to 22 femoral pores on each side. Caudal scales as large as dorsals, strongly mucronate. Males with enlarged postanal scales. d. d. 0, d- S. Jose del Oabo. Miraflores. Eisen Eisen ... i. 83 82 75 62 70 2, 17 17 14 13 14 3. 19 19 15 14 15 4. 21 21 17 16 18 5. 23 24 20 20 21 6. 29 28 29 29 28 7. 6 8| 5 6 6 8. 34 36 32 32 36 9. 19-17 20-20 18-18 17-18 18-18 Olive above, with a more or less distinct yellowish or reddish stripe along each side of the back; more or less distinct dark bars may be present across the back. Yellowish white beneath ; males with a bluish-black band along each side of the middle line of the belly, and extending on the anterior face of the thigh ; a blue-black vertical bar in front of the arm, sometimes connected w ith the ventral band ; posterior part of the throat blue-black. Females uniform yellowish white beneath. Hab. Lower California and neighbouring islands (Ceros, Santa Margarita, and Magdalena). 1 Cope says: " Parietal scales wider than the interparietal." This is no doubt a lapsus, as may be seen by comparing Stejneger's figure, drawn from the type specimen. |