278 U.S. NATIONAL MUSEUM BULLETIN 2 88 



that coincides with white lines on the heels when the legs are flexed. 



H. minuta may be distinguished from members of both the leuco- 

 phyllata and microcephala groups (the other small Colombian hylas 

 with reduced pattern on the thighs) by the distinct transverse white 

 line above the vent and on the heels. 



Description.— CNHM 81764, Meta, Villavicencio, Colombia.Vomer- 

 ine teeth in two small rounded patches lying between the small, 

 rounded choanae; tongue three-fourths as wide as mouth opening, 

 broadly cordiform, its posterior border free and very shallowly notched. 

 Snout short, somewhat rounded when viewed from above, slightly 

 rounded in profile, the upper jaw extending but slightly beyond lower; 

 nostrils more lateral than superior, slightly projecting, their distance 

 from end of snout about one-half that from eye, separated from each 

 other by an interval equal to their distance from eye. Canthus rostralis 

 slightly denned; loreal region nearly flat and nearly vertical, the upper 

 lip flaring out but slightly below it. Eye moderate, its diameter slightly 

 greater than its distance from nostril; palpebral membrane not retic- 

 ulate; interorbital distance slightly greater than width of upper eye- 

 lid, which is about equal the distance between nostrils. Tympanum 

 inconspicuous but distinct, about one-fourth the diameter of eye, 

 separated from eye by a distance nearly equal to one-half its own 

 diameter. Fingers webbed at base, the web reaching the distal end of 

 antepenultimate phalanx of third finger and to middle of penultimate 

 phalanx of second and fourth fingers; fourth finger longer than second, 

 not quite reaching to disk of third which just covers 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 base of 

 penultimate phalanx, third and fifth toes subequal, disk of fourth toe 

 covering about three-fourths 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 not elongate, in 

 postaxillary region about equal the greatest width of head; when 

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

 along the side, knee and elbow overlap slightly; when hind legs are 

 bent at right angles to body, heels overlap considerably. No apparent 

 patagium. Skin of upper parts smooth; a rather narrow indistinct 

 glandular ridge encircling upper part of tympanum; skin of throat 

 and chest smooth, that of belly and lower surface of thigh uniformly 

 and very finely granular; traces of a skinfold across chest; adult 

 female, no vocal sac. Skin of head not co-ossified with skull, roof of 

 skull not exostosed. 



Dimensions.— Head and body, 24.3 mm.; head length, 8.2 mm.; 

 head width, 8.6 mm.; femur, 12 mm.; tibia, 14 mm.; heel-to-toe, 20 

 mm.; hand, 8 mm. 



