316 DR. H. GAUOW UN EVOLL'TIOX [Mar. 20, 



specimens with only 8 white stripes and with a narrow uniformly 

 darker centre are very laie. 



(2) The scarcity of black on the collar and throat of the males ; 

 only in 6 males was the collar black or inclining to l)lack, although 

 in one adult male from Tequesixtlan the whole thi'oat was V)lue 

 and partly suft'used w^ith black from the collar upwards. 



(3) Tendency of stripe 1 and even of stripe 2 to break up into 

 beads, and the appearance, advancing with age, of wdiite spots in 

 field I. and in the lateral field, so that one or two additional lines 

 of beads may be developed in this lateral field. 



This breaking up of the first stripe into beads occurs also in 

 some few specimens of Tierra Colorada, and in one of the 7-stripeil 

 specimens fiom tSan Luis. 



Vera Cruz, near the seashore : 7 specimens collected by Dr. Meek. 

 1 with 8 stripes, 5 with 9 stripes ; and in a young specimen the 

 central, 5th stripe, is restricted to the nape and neck. Throat 

 and collar not black. 



Las Penas, Jalisco, near the seashore : 4 specimens collected by 

 Dr. BuUer, Brit. Mus. 



1 very young specimen of 33 mm. ; with 10 stripes, and with 

 an a<lditional faint line on the flanks. 



1 2 of 45 mm. ; witli 10 stripes, and with an additional weak 

 line. 



1 $ of 54 mm. ; with 9 stripes, and with a stronger line. 



1 c? of 65 mm. ; with 9 stripes ; with two additional long lines 

 of white beads; moreovei- stripes 3 and 4 are dissolved into Ijeady 

 lines. Throat and collar black, abdomen blue. 



Colima. — Cope's description of Cnemidophorus lineaiissimus, 

 Proc. Amer. Phil. Soc. 1877, p. 94. Black, with 10 or 11 pale 

 bands, sides and femora pale-spotted ; throat black. This and the 

 rest of his desci-iption refer obviously to 10- or 11 -striped male 

 specimens of C deppei, resembling some of those of Oaxaca and 

 Las Pehas in Jalisco. Cope gives " Guadalajara " as another 

 locality, a very doubtful statement. The plain of Guadalajara, 

 with its elevation of more than 5000 feet, is absolutely above the 

 range of C. deppei and C. immutabilis, which are essentially hot- 

 country species ; but it is possible that Cope's specimens came 

 from the barranca, through which flows the Rio Santiago, a few- 

 hours' ride from the town, and 2000 feet lower than the surround- 

 ing plateau. — Bocourt, Miss. Scient. Mex., described two specimens 

 from " Colima," with 9 stripes. 



Cnemidophorus deppei, var. cozumela. 



4 specimens from the island of Cozumel, East Coast of Yucatan. 

 British Museum. 



Lengtli 64-71 mm. ; the largest specimen is gravid. 



Collar like that of C. deppei. 



Supraoculars : one with 3/3 ; two with 3 left, right posterior 

 very small ; one with 4/4, the posterioi' very small. In this respect 

 resembling some of the C. deppei of South Guei-rero. 



