246 U.S. NATIONAL MUSEUM BULLETIN 288 



flaring out rather strongly below it. Eye neither large nor prominent, 

 its diameter a little less than its distance from nostril; palpebral 

 membrane not reticulate; interorbital distance slightly greater than 

 width of upper eyelid and than the distance between nostrils. Tym- 

 panum very distinct, about three-fifths the diameter of eye, separated 

 from eye by a distance equal to one-half its own diameter. Fingers 

 with but the merest trace of web at base, fourth finger but slightly 

 longer than second, not reaching to disk of third which covers about 

 three-fourths the tympanic area; no projecting rudiment of a pollex; 

 no ulnar ridge. Toes slightly more than one-half webbed, the web on 

 fourth toe reaching the distal end of the antepenultimate phalanx, 

 third and fifth toes subequal, disk of fourth toe covering about two- 

 thirds the tympanic area; a distinct oval inner and a smaller but 

 equally distinct rounded outer metatarsal tubercle; no tarsal ridge; 

 no dermal appendage on heel. Body moderately elongate, in post- 

 axillary region a little narrower than greatest width of head; when 

 hind leg is adpressed, heel reaches beyond tip of snout; when limbs 

 are laid along the side, knee and elbow overlap considerably; when 

 hind legs are bent at right angles to body, heels overlap greatly. No 

 patagium. Skin of upper parts generally smooth but with a few gran- 

 ulations on top of snout, in the region behind the eyes, above the 

 tympanum, and at insertion of the arms. A well-developed narrow 

 glandular ridge passes above the tympanum ; skin of throat and chest 

 smooth, that of belly and lower surface of thigh uniformly granular; 

 a skinfold across chest; adult male, no vocal sac apparent. Skin of 

 head not co-ossified with skull, roof of skull not exostosed. 



Dimensions. — Head and body, 40.3 mm.; head length, 15.3 mm.; 

 head width, 14.8 mm.; femur, 21.7 mm.; tibia, 26.6 mm.; heel-to-toe, 

 34.7 mm.; hand, 12.3 mm. 



Color in alcohol. — A dark brown frog with a limited pattern of 

 black. The main elements of the pattern are as follows: a black- 

 bordered interocular triangle with its apex pointed posteriorly; 

 black supratympanic glandular ridges; a pair of small but conspicuous 

 suprascapular spots; and black bands across the anterior and pos- 

 terior faces of the thighs. On top of the thighs and shanks and, to a 

 lesser extent, on the wrists there are faint crossbands of grayish brown. 

 The entire undersurface of chin and throat is tinged with dusky. 



Remarks. — The following comparison of Hyla boulengeri and H. 

 joliamona was made by the junior author and Dr. M. J. Fouquette 

 while they had all of the Colombian material of boulengeri and folia- 

 morta and the type oi Joliamorta before them. 



"Comparison of joliamorta with boulengeri: First, in general al- 

 though not invariably, joliamorta seems to have more pointed tip 

 to the snout. This can be more readily seen from the ventral view. 



