236 U. S. NATIONAL MUSEUM BULLETIN 206 



few small pustules on upper eyelids behind eyes and on posterior part 

 of the body and a faint A-shaped gland in the center of the back; a 

 heavy but narrow fold leaving posterior corner of eye, encu'cling the 

 tympanic area and ending behind mouth; venter smooth except for 

 some slight granulations on the posterior surface of femur. A slight 

 skinfold across the throat, but apparently no external vocal sacs. 



Dimensions. — Head and body 47 mm.; head length 17.5 mm., 

 width 21 mm.; femur 16.5 mm.; tibia 17 mm.; foot 20 mm.; hand 12 

 mm. 



Mathematical analysis (in percentage of the total length): 



head head 

 length* width femur tibia foot hand 



Number 5 5 5 4 5 5 



Mean 38. 3 42. 5 38. 5 36. 5 43. 26. 



Standard deviation L 86 1. 09 3. 96 1. 24 1. 85 3. 74 



Variation 4. 9 2. 6 1. 03 3. 4 4. 3 6. 9 



Standard error .83 .49 1. 54 .62 .82 1. 67 



Range 36. 5- 41. 7- 35. 0- 34. 6- 41. 7- 23. 1- 



41. 7 44. 6 45. 8 37. 7 46. 6 33. 3 

 * To angle of jaws. 



Color in alcohol. — Uniform light cinnamon brown above, with small 

 spots on the sides; venter pale wood brown; throat suffused with dark 

 cinnamon. 



Variations. — The color of the Teres6polis specimen, USNM 121633, 

 is as follows: Dorsum seal brown with Indian purple anteriorly, 

 lightening posteriorly; a brown W-shaped mark across the shoulders, 

 and a dark line between the eyes followed by a dark occipital patch. 

 The belly and lower limb surfaces are pale olive- buff, the throat and 

 sides of the body are coarsely mottled with brown, and some spots of 

 this appear also on the anterior and posterior femur. A pale line 

 borders the temporal ridge beneath; the remainder of the upper lip 

 is dark brown like the top of the head. Tips of toes and fingers, as 

 well as subarticular tubercles, are very pale olive-buff. The upper 

 femur is crossed by two very dark narrow bars, continuing across the 

 tibia and foot, when the legs are bent in the usual crouching position. 



Remarks. — In the original description of this species, no mention 

 was made of the fact that the maxillary bone widens greatly just 

 anterior to the commissure of the jaws, a structm'al feature which 

 increases the gripping power of the jaws, possibly due to cannibalistic 

 habits. 



In an attempt to fix the exact type locality, given only as "Organ 

 Mountains," collected August 12, 1915, Dr. Rose's notebook was 

 consulted in the Department of Botany in the U. S. National Museum. 

 On August 11, 1915, Dr. Rose collected at Petr6polis. The entry 



