108 U. S. NATIONAL MUSEUM BULLETIN 206 



the postaxillary region somewhat narrower than greatest diameter of 

 head. When hind leg is adpressed, heel reaches barely to anterior 

 corner of eye; when limbs are laid along the side, knee and elbow 

 barely touch; when hind legs are bent at right angles to body, heels 

 considerably overlap. Skin of upper parts smooth; an ill-defined 

 glandular ridge above tympanum; skin of throat and chest smooth, 

 of belly very coarsely granular, of lower femm* smooth except for a 

 few indistinct granulations from the vent midway to its distal part. 

 Traces of a slight skinfold across the chest. (A very large median 

 external vocal sac in the male.) 



Dimensions. — Head and body 20 mm.; head length 6 mm., width 

 6 mm.; femur 9 mm.; tibia 10 mm.; foot 7 mm.; hand 5 mm. 



Color in alcohol. — The specimen described has faded to a dull smoke- 

 gray above and below, slightly lighter on femur, slightly darker along 

 the sides from tympanum to groin and considerably darker on snout, 

 hands and feet. 



In one of two freshly preserved specimens (USNM 103619-20) the 

 dorsum is pinkish Isabella color with darker spots; the venter olive- 

 bujff; the iris gray (?). The other is olive-buff above and below, with 

 characteristic dark spots on back and Umbs. Both have a dark lateral 

 stripe. 



Color in life. — From sketch by Sandig of an adult female (USNM 

 96861 ). Dorsal ground color wax yellow, with some very minute gray 

 dots sprinkled over head and back; a dark dorsolateral line beginning 

 apparently on the canthus and continuing above the ear and along the 

 side almost to groin; proximal part of femur and upper arm immacu- 

 late white, darkening to canary yellow towards knee and elbow; re- 

 mainder of upper surfaces of arms and legs canary, the webs of the 

 toes white, the disks of toes and fingers orange above. Chin and chest 

 straw yellow, belly white, lower surface of femur cream color; palms 

 of hands and soles of feet pale canary, the disks faintly tinted with 

 orange below. Iris apparently light wax yellow, the pupil black. 



Remarks. — Hyla sanbomi Schmidt and H. elongata are very closely 

 related in most of the essential characters, since the critical propor- 

 tions of the body, the texture of the skin, pattern, size, and general 

 appearance are exceedingly similar. The most apparent difference 

 between the two forms seems to be in the conformation of the snout; 

 in elongata the nostrils do not rise distinctly above the rounded surface 

 of the snout and the surface is consequently evenly convex, while in 

 sanbomi the region surrounding each nostril is swollen into a distinct 

 mound, with a median furrow between the two elevations. Further- 

 more, the eyelid in sanbomi is only one-half or three-fifths of the inter- 

 orbital width, while in elongata it is four-fifths or more of the inter- 

 orbital width. This measurement of eyelid to interorbital width 



