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Show 508 MR. G. A. BOULENGER ON THE [May 18, Caudal scales larger than dorsals, keeled. Males with enlarged postanal scales. d. Hemet Valley, S. Diego Co., Cal. Gilbert. 9 • 11 !> 11 ••• O 1. 42 59 55 45 44 47 2. 9 12 11 9 9 10 3. 10 13 12 10 10 11 4. 10 13 12 9 9 10 5. 12 17 16 11 12 14 6. 55 56 63 56 55 52 7. 13 15 16 12 13 12 8. 52 58 57 58 54 56 9. 16-16 15-14 15-15 18-18 18-18 18-17 (1) Type of S.jalapce. The series of femoral pores separated by a single scale on tbe praeanal region, as is likewise the case in one of the two females from Puebla. Olive above, with two more or less distinct lighter or yellowish stripes along each side, and longitudinal series of transverse blackish spots which may be confluent into stripes. Male with the sides of the belly blue and black-edged, tbe middle line white and narrow or more or less broad ; throat blue, or whitish with a few black spots; front of arm and thigh sometimes black. Eemale with the lower parts uniform white. Hab. S. gratiosus has a wide distribution. It is on record from British Columbia, Oregon, California, Nevada, Utah, Arizona, ISorthern Lower California, Vera Cruz, and Puebla. 19. SCELOPORUS G R A M M I C U S. Sceloporus grammicus, Wiegm. Isis, 1828, p. 370, and Herp. Mex. p. 51 (1834); Bocourt, Miss. Sc Mex., Eept. p. 192, pl. xviii. bis, fig. 12 (1874) ; Cope, Proc. A m . Philos. Soc. xxii. 1885, p. 395; Bouleng. Cat. Liz. ii. p. 231 (1885); Giinth. Biol. C.-Am., Eept. p. 71 (1890). Scelopjorus pleurostlctus, Wiegm. Isis, 1828, p. 370. Tropidolepls grammicus, Gray, Griff. A.K. ix. Syn. p. 43 (1831); Dum. & Bibr. Erp. Gen. iv. p.*308 (1837). Sceloporus heterurus, Cope, Proc. Ac. Philad. 1866, p. 322. Head-shields smooth or slightly rugose; frontal transversely divided, in contact with the interparietal, which is a little broader than long; parietals small, usually one pair on each side; a series of four or five transversely enlarged supraoculars, bordered inwards by one series of scales and separated from the suprariharies by two or three series; two canthal scales ; anterior border of ear feebly denticulated. Dorsal scales larger than ventrals, strongly keeled, not or but slightly mucronate, forming oblique series; 45-50 scales between tbe interparietal shield and the base of the tail, 12-15 corresponding to the length of the shielded part of the head. Lateral scales keeled, directed obliquely upwards and backwards, gradually |