SCELOPORUS.—PHRYNOSOMA. 77 
cross-bars, or light brown, with a double longitudinal series of transverse black spots 
and a yellowish band along each side of the back. 
Length 22 inches without tail. 
The following species have not been seen by me:— 
1. From Mexico and La Noria (Michoacan) and Tupataro, near Guanajuato. 
Sceloporus melanogaster, Cope, Proc. Am. Phil. Soc. 1885, p. 400: according to 
Dugés, La Naturaleza, i. p. 114, it is not from Guanajuato. Boulenger’s Sceloporus 
melanogaster is certainly a different form. 
2. From Guanajuato (2). 
Sceloporus ferrari-perezi, Cope, Proc. Am. Phil. Soc. 1885, p. 400. 
3. From Tehuantepec and Colima. 
Sceloporus melanorhinus, Bocourt, Journ. Zool. v. 1876, p. 341, and Ann. Sc. Nat. 
1876, iii. art. 12; Cope, Proc. Am. Phil. Soc. 1885, p. 399; Sumichrast, Bull. Soc. 
Zool. v. 1880, p. 176. 
4. From Vera Cruz. 
Sceloporus torquatus mucronatus, Cope, Proc. Am. Phil. Soc. 1885, p. 402. 
5. From Monterey, Nuevo Leon. 
Sceloporus torquatus cyanogenys, Cope, Proc. Am. Phil. Soc. 1885, p. 402. 
6. From Guatemala and Antigua (alt. 1500 metres), and from the mouth of the 
Nagualate. 
Sceloporus squamosus, Bocourt, Miss. Sc. Mex., Rept. p. 212, t. 18 bis. figg. 7, 7 a2, 
and t. 19. fig. 3. 
7. From Yucatan. 
Sceloporus serrifer, Cope, Proc. Ac. N. Sc. Phil. xviii. p. 124. I suspect that the 
specimen referred by Boulenger to this species is a distinct form; but as the exact 
locality of that specimen is unknown, I omit a description of it. 
PHRYNOSOMA. 
Phrynosoma, Wiegmann, Isis, 1828, p. 367. 
These lizards are called ‘‘ Caméle6én” by the Mexicans *. © 
* Whilst in the English-speaking countries of the Southern United States the term “ Horned Toad” is 
applied to them. Several observers have recorded a singular habit of these lizards (see, for instance, J. Wallace, 
Proc. Zool. Soc. 1871, p. 1), viz., under certain circumstances, apparently as a means of defence, they squirt 
from one of the eyes a jet of bright red liquid, very much like blood, to a distance of about six inches. Only 
a few individuals will do this occasionally, while many others never do it. The specimens in which it has 
been observed seemed to belong to P. cornutum. I have not been able to find the source of this secretion by dis- 
section of fresh examples; and accurate observation of individuals which possess this power is very desirable. 
