1919] Dickerson, Diagnoses of New Species and a New Genus of Lizards 473 



The immature are black with 6 narrow white stripes dorsally (lowest on a line 

 with the ear), lateral space black with irregular oblique and vertical white bars. 

 In the development of the adult pattern, minute white spots appear above the lowest 

 white stripe and widen to connect with it, scalloping the lower edge of the black band 

 above; minute Avhite spots appear in the median black band and spread obliquely, 

 alternate ones in opposite directions to meet the adjoining white stripes, converting 

 the median straight black band into a waved one and eventually by a deepening of the 

 curves into a chain of round black spots; minute transverse extensions of white 

 along the lower margin of the dorsal white stripe of each side, and similarly along 

 upper and lower margins of the dorsolateral white stripe, scallop in a similar way the 

 black bands adjoining, converting these also into chains of round black spots. 



Measurements of the Type. — Total length, 295 mm +; head and body to 

 anus, 90; tail length, 205 + (reproduced); tip of muzzle to collar, 31; shielded head, 

 or to anterior border of ear, 22.5, to posterior border, 25; greatest head width, 15, 

 width at posterior angle of orbit, 11, at anterior angle, 8.5: hind leg, 67; base of 

 5th to end of 4th toe, 31. The ratios of foot to head measurements in the type do 

 not hold good in the adult male. In a male of 102 mm. head and body length, base 

 of 5th to end of 4th toe is 33 mm., muzzle to collar, 40, greatest head width, 19. 



The range of this species probably includes the mainland of 

 Lower California along the Gulf northward from La Paz and San Jose 

 Island. It is probably the species in the collections of the Museum 

 d'Histoire Naturelle, from Santa Rosalia and Mulege, identified by 

 Mocquard (1899, Nouv. Arch, du Museum d'Hist. Nat., (4) I, p. 315) 

 as Cnemidophorus grahamii Baird and Girard (type 'trom Texas, 1852). 



19. Cnemidophorus disparilis, 1 new species 



Type.— A. M. N. H. No. 5527. Collector, C. H. Townsend, Albatross Expedi- 

 tion, April 12, 1911. 



Paratypes — A. M. N. H. Nos. 6884-6885, immature. 



Type Locality. — Tiburon Island, Gulf of California, Mexico. 



Diagnosis. — Of medium size; with fine and uniform dorsal scutellation, ab- 

 dominal ventrals in 8 longitudinal rows; head depressed; frontoparietals separate, 

 nostril anterior to nasal suture. The nasal is not in contact with the second supra- 

 labial; scales on posterior collar of considerable size, scarcely larger than enlarged 

 scales at center of gular region, margin of fold with 1-4 rows of minute scales; 4 

 supraoculars ; 6 femoral rows of enlarged scales, 3 tibial (of great size in two anterior 

 rows), 7-8 brachial, 3 antebrachial; underside of forearm with narrow band of en- 

 larged scales on posterior aspect; femoral pores, 19. General coloration in adult 

 orange-brown dorsally, ventrally blackish over all surfaces, even of the feet. Color 

 pattern 7-9 extremely narrow, orange-brown longitudinal lines, straight or wavy, 

 alternating with black lines of similar narrowness; brilliant color obscured by black- 

 ish anteriorly; sides ornamented with orange spots more or less in vertical rows 



'With reference to the coloration of the immature, at present unlike anything known in the genus 

 outside of this species and its very close relative, C. martyris. 



