26 



PROCEEDINGS OF TEE NATIOISTAL MUSEUM 



VOL. 73 



12; sublabials, 14. Dorsal scales small, hardly more than half the 

 size of ventrals, gradually increasing in size posteriorly, smooth; a 

 well-developed dorsal crest composed of from 63 to 75 carinated 

 scales extending from insertion of neck caudad to base of tail, being 

 continuous over sacral region as true carinated scales, but much 

 reduced in height. In old males these dorsal spines reach a height 

 of 10 mm. Leg scales without spines. Femoral pores vary from 5-5 

 to 7-7. Toes very long, especially those of hind feet; claws strong 

 and sharp. Tail nearly cylindrical, scales on upper side being of two 

 kinds, large and spinous, and small, low, flat scales arranged in 

 whorls. Median dorsal scales are large and heavily armed through- 

 out length of tail. The others are arranged in whorls; some whorls 

 are spinous and some are flat and smooth. First 5 whorls of large 

 spinous scales separated from each other by 3 rows of small flat 

 scales; next 9 or 10 whorls of large spinous scales separated from 

 each other by 2 rows of small flat scales, while on terminal three- 

 fifths of tail all of scales gradually become equally spinous. At base 

 of tail ventral scales are smaller than dorsals, four rows of ventrals 

 corresponding to three above, slightly keeled and pointed posteriorly. 

 Measurements. — 



Berlin Mu- 

 seum, type 

 No. 574 M. 



M.C.Z.M. 

 No. 2726 



M.C.Z.F. 

 No. 6982 



Length of head 



Length of body 



Length of taiL 



Total length 



Breadth of head over orbits. 



Mm. 



65 



205 



>405 



1660 



28 



Mm. 



85 



220 



1180 



1485 



32 



Mm. 



70 

 210 



455 



735 



30 



1 Tail broken off. 



Coloration. — General body color is brown-olivaceous streaked with 

 yellow. Dorsal spines are yellow wherever the yellow markings cross 

 the mid-back. Upper portion of head is brown, lores yellowish. 

 Except for two small transverse brown bands the lower maxillae is 

 yellowish. Neck brown, with rather long yellow bar running caudad 

 from posterior margin of tympanum, vanishing slightly caudad and 

 above axilla of arm. Abdomen yellowish olive girdled by three 

 brown (sometimes broken) bands. Breast brown; limbs brown with 

 yellow marks and spots. Tail ringed with alternate, wide bands of 

 brown and yellow. 



Remarlcs. — Wiegmann described this species from a male specimen 

 collected by F. Deppe in "Mexico." Many specimens, ranging in 

 age and size from very young to adults, including both sexes, have 

 been examined and found to agree with the type in all essential 

 characteristics. 



