FROGS OF COLOMBIA — COCHRAN AND GOIN 183 



beyond lower; nostrils more lateral than superior, not projecting, 

 their distance from end of snout about two-thirds that from eye, 

 separated from each other by an interval equal to about two-thirds 

 their distance from eye. Can thus rostralis well defined; loreal region 

 concave and nearly vertical. Eye neither large nor prominent, its 

 diameter equal to its distance from nostril; palpebral membrane not 

 reticulate; interorbital distance slightly greater than width of upper 

 eyelid, which is relatively wide and slightly greater than distance 

 between nostrils. Tympanum very distinct, about three-fourths the 

 diameter of eye, separated from eye by a distance nearly equal to its 

 own diameter. Fingers with just a trace of web at base, fourth con- 

 siderably longer than second, reaching to middle of disk of third 

 which covers about four-fifths the tympanic area; no projecting rudi- 

 ment of a poll ex; no ulnar ridge. Toes about one-third webbed, the 

 web on fourth toe reaching the base of the antepenultimate phalanx, 

 third and fifth subequal, disk of fourth covering about two-thirds the 

 tympanic area; a distinct oval inner and a smaller but distinct rounded 

 outer metatarsal tubercle; no tarsal ridge; no dermal appendage on 

 heel. Body somewhat elongate, but distorted by having the theca 

 packed with eggs. When hind leg is adpressed, heel reaches anterior 

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

 slightly overlap; when hind legs are bent at right angles to body, heels 

 overlap greatly. No patagium. Skin of upper parts smooth but with 

 tile-like pattern due to the eggs in the theca. A rather narrow glandular 

 ridge passes above tympanum; skin of throat and chest, belly, and 

 lower surface of thigh uniformly and very finely granular; traces of a 

 skinfold across chest; adult female, no vocal sac. Intersquamosal shelf 

 incomplete laterally, thus not forming a complete transverse shelf at 

 the rear of the head. Skin of head not co-ossified with skull, roof of 

 skull strongly exostosed. 



Dimensions. — Head and body, 73.8 mm.; head length, 25.2 mm.; 

 head width, 28.1 mm.; femur, 35.2 mm.; tibia, 39.5 mm.; heel-to-toe, 

 58 mm.; hand, 28.2 mm. 



Color in alcohol.— Gun-metal blue on all dorsal surfaces; ranging 

 from dirty gray to bluish gray on all ventral surfaces. No pattern 

 apparent. 



Variation. — There is little variation apparent among the pre- 

 served series of adults. The females are somewhat larger (two adult 

 females, 73.8 and 71 mm. in head and body length; three adult males, 

 64.7, 64.1, and 62.3 mm.) and one of the males has a more mottled 

 belly surface, in this respect approaching the appearance of G. mon- 

 ticola agenteovirens. 



Color in life. — Male: Very pale bronzy green on top of head, dor- 

 sum, top of forearm, hand, shank, and foot; tympanum, top of upper 



