230 Proceedings of the Biological Society of Washington. 



pores in S. disparilis varies between 12 and 17, this discrepancy does not 

 seem to be of any importance. 



For the sake of comparison with Sceloporus microlepidotus, I submit 

 the following averages taken from the 32 specimens of the latter recorded 

 by Boulenger (P. Z. S., 1897, p. 510): Snout to ear-opening, 12.4 mm. ; 

 fourth toe from base of fifth, 15; scales, occiput to tail, 73.7; scales in 

 head length, 17.1; scales round middle, 69.8; femoral pores, 16.2. These 

 should be compared with the averages of Sceloporus dispar given in the 

 following table: 



1—1 



4^ 



e 



s 



O 



a, 



o 

 u 



e 



eg- 



O 



03 



