476 Bulletin American Museum of Natural History [Vol. XLI 



Measurements of the Type. — Total length, 313 mm.; head and body to anus, 

 85; tip of muzzle to collar, 29, to anterior border of ear, 22; greatest head width, 

 14.5, width at posterior angle of orbit, 12, at anterior angle of orbit, 9; hind leg, 65; 

 base of 5th to end of 4th toe, 29. 



Cnemidophorus punctilinealis, new species, compared with C. nielan- 

 ostethus Cope, attains advanced stages in the somewhat similar series of 

 color patterns (with appearance of the black spots and elimination of the 

 longitudinal stripes) at very much earlier periods in the development. 

 The two species can always be distinguished by the very different color 

 pattern of the sides, and by the longer head and foot of C. punctilinealis. 



C. punctilinealis is represented in the W. W. Brown collection of the 

 Museum of Comparative Zoology by one half-grown specimen (Field 

 No. 785) from Guaymas on the coast of the Mexican mainland. 



22. Cnemidophorus bartolomas, new species 



Type.— A. M. N. H. No. 5508. Collector, C. H. Townsend, Albatross Expedi- 

 tion, March 13, 1911. 



Paratypes. — A. M. N. H. Nos. 5507, 5509, San Bartolome Bay; 5522, Abrejos 

 Point, Ballenas Bay. 



Type Locality. — San Bartolome Bay, Lower California, Mexico. 



Diagnosis. — A very long-tailed species of medium size. Dorsal scutellation 

 uniform (somewhat coarse, 2 granules to the millimeter), 8 rows of abdominal ventrals, 

 nostril anterior to suture, 4 supraoculars, 2 frontoparietals, a long series of femoral 

 pores (16-19). The collar is margined with small scales about size of posterior gulars, 

 but has 4-5 rows enlarged at the middle anterior to these, 3-4 of which equal the 

 largest central anterior gulars; great variability in arrangement of scales about nasal, 

 nasal sometimes in contact with the second supralabial. Brachials, 6; antebrachials 

 4, those in the first posterior row small, in second posterior row of moderate size; 

 scales underside forearm posterior aspect not enlarged; femorals 7-8; tibials 3. 

 General coloration light olive dorsally, browner on head and tail; bluish white ven- 

 trally, spotted irregularly with black from the sides of the head and gular region out 

 on to the tail. Dorsal pattern 5 longitudinal light stripes within area continuous 

 with space between temporal angles; dark bands between these stripes cut cross- 

 wise into spots by development of light cross-stripes; these light cross-stripes in the 

 two dorsal bands alternate with one another, thus converting the median fight 

 longitudinal stripe into a zigzag stripe and leaving the black spots in the 2 dorsal 

 rows alternate with one another. Black markings both dorsal and lateral moderate 

 and relatively uniform in size and intensity, giving an effect of considerable neat 

 regularity in longitudinal (8-10) and transverse (about 25) rows, notwithstanding 

 their very great diversity in shape. Pattern, both stripes and spots, obscured post- 

 teriorly. 



Measurements of the Type. — Total length, 304 mm.; head and body to anus, 

 82; tail length, 222; collar to anus, 55; tip of muzzle to collar, 27, to posterior ear. 

 225; to posterior margin of interparietal, 205.; tip of muzzle to axilla, 33.5; head 

 width at posterior orbital angles, 12, at anterior orbital angles, 9; hind leg, 58; length 

 of 4th toe from base of 5th, 28. 



