1906.] IX JIEXICAX LIZARDS. 317 



Posterior side of foreavni coveied with granules, which in three 

 specimens are slightly enlarged towards the elbow ; in one specimen 

 enlarged near the elbow into small polygones. 



Femur with 6 rows of scales, of which three extend to the 

 knee. 



Femoral pores 15, 16, 17, and 18. 



F'ot only the first, hut also the second, and even the third iqjper 

 labials are denticulated. 



The under pai'ts are pale, with a mother-of-peai'l lustre ; but the 

 coloration of the upper parts is very peculiai-. There is a very 

 broad mid-field which is uniformly brown ; between it and the 

 flanlcs are on either side 4 to 5 very narrow, continuous, but 

 trembling, white lines. One of the five stripes lies below, ventrally 

 from, the usual 1st stripe, which extends from the ear to and 

 upon the thigh. Such an extra stripe is known in otherwise 

 10-striped C. d&ppei of Tehuan tepee, while an unusually broad 

 mid-field occurs in the 8-striped specimens of San Juan Evange- 

 lista. — Combination of an extra sti'ipe on the flanks with a very 

 broad mid-field I have found in one specimen of Tequesixtlan, but 

 in all these continental specimens the stripes are straight, well- 

 defined lines, not wavy or trembling. 



Summary concerning C. deppei. 



When we reduce the results of the tedious examination of the 

 152 specimens to a few sentences, they become vague because of 

 the great amplitude of the variations. As typical averages may 

 be mentioned : — 



Supraoculars 3, exceptionally 4, bordered behind by only one 

 narrow stiip of elongated granules. 



Collar complete, the large rows of scales mostly reaching right 

 across ; posterior border with or without granules. 



Throat very rarely with a central cluster of larger scales. 



Front of humerus with 3, 4, or 5 larger rows. 



Posterior side of forearm covered with granules. 



Anterior aspect of thigh with 4| to rarely 8 rows, mostly 6, the 

 three largest of which reach down to the knee. 



Femoral pores 14-22 of rare occurrence, usually 17-18. 



Coloration. — Adult males with blue-black chest and belly. 

 Under surface of tail blue and white. Upper surface always 

 striped : 7-1 1 stripes, of which the first, rarely also the second, 

 may dissolve into beads. White spots appear occasionally in the 

 lateral field and in field I. 



The under parts of females are never black or blue, neither 

 collar nor belly. 



As a rule, with veiy few exceptions, the first stripe extends 

 upon the thigh, and reappears on its posterior side as an unbroken 

 white streak. 



Size. — Distinctly small, very rarely surpassing 80 mm. 



Each of the four main districts, in which I have personally 



