FROGS OF COLOMBIA — COCHRAN AND GOIN 207 



Diagnosis. — A moderate-sized Hyla apparently allied to H. geo- 

 graphica, with dark markings in region of groin and on anterior and 

 posterior faces of thighs, with exceedingly well-developed dermal 

 spurs on heels, and without reticulations on the palpebral membranes. 



Superficially, H. calcarata closely resembles H. partialis, but it can 

 be distinguished from that species by the greatly reduced webs 

 between the fingers. From young H. rosenbergi it differs in having 

 dark markings in the groin and on the thighs, a smaller tympanum, 

 and a well-developed dermal spur. From H. geographica and young 

 H. maxima, which it closely resembles, it can be distinguished by the 

 absence of palpebral reticulations. 



Description. — CNHM 81333, an adult female from Rio Guapaya, 

 Serrania de La Macarena, Meta, Colombia. Vomerine teeth in two 

 heavy series, lying close together between the large, oblong choa- 

 nae; tongue two-thirds as wide as mouth opening, broadly cordiform, 

 its posterior border fused and with but a trace of a notch. Snout 

 large, somewhat pointed when viewed from above, rounded in profile, 

 the upper jaw extending slightly beyond lower; nostrils more lateral 

 than superior, not projecting, then distance from end of snout about 

 one-third that from eye, separated from each other by an interval 

 equal to about two-thirds their distance from eye. Canthus rostralis 

 slightly defined; loreal region concave and oblique, the upper lip 

 flaring out below it. Eye moderate, not particularly prominent, its 

 diameter equal to its distance from nostril; palpebral membrane 

 not reticulate; interorbital distance slightly greater than width of 

 upper eyelid, which is in turn slightly greater than distance between 

 nostrils. Tympanum very distinct, about one-half the diameter of 

 eye, separated from eye by a distance about equal to one-third its 

 own diameter. Fingers with a trace of web at base, fourth finger 

 considerably longer than second, just reaching to disk of third which 

 covers about two-thirds the tympanic area; no projecting rudiment 

 of a pollex; a distinct but not conspicuous ulnar ridge. Toes slightly 

 more than one-third webbed, the web on fourth toe not quite reach- 

 ing the base of the penultimate phalanx, third and fifth toes subequal, 

 disk of fourth toe covering about one-third the tympanic area; a 

 distinct oval inner but no distinct rounded outer metatarsal tubercle; 

 tarsal ridge small but distinct, a very distinct, elongate dermal 

 appendage on heel. Body somewhat elongate, in postaxillary region 

 a little narrower than greatest width of head; when hind leg is ad- 

 pressed, heel reaches beyond tip of snout; when limbs are laid along 

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

 bent at right angles to body, heels overlap greatly. No patagium. 

 Skin of upper parts smooth; a rather narrow glandular ridge encir- 

 cling upper part of tympanum; skin of throat and chest smooth, 



