FROGS OF COLOMBIA — COCHRAN AND GOIN 359 



interorbital distance 2^ times the width of upper eyelid, which 

 is about equal to the distance between nostrils. Tympanum very dis- 

 tinct, about one-half the diameter of eye, separated from eye by a dis- 

 tance nearly equal to two-thirds its own diameter. Fingers with just a 

 trace of web at base, fourth finger considerably longer than second and 

 reaching to middle of disk of third which just snugly covers the tym- 

 panic area; no projecting rudiment of a pollex; no ulnar ridge. Toes 

 slightly more than one-half webbed, the web on fourth toe reaching 

 just to base of the penultimate phalanx, third slightly longer than 

 fifth, a disk of fourth covering about one-third 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 rather elongate, in postaxillary region about equal to greatest 

 width of head; when hind leg is adpressed, heel reaches posterior mar- 

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

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

 A trace of a patagium extends from back of upper arm to side of body. 

 Skin of upper parts smooth, skin of throat and chest rather smooth, 

 that of belly and lower surface of thigh uniformly granular ; traces of a 

 skinfold across chest; adult female, no vocal sac. Entire surface of top 

 of head and face except eyelid fused into a solid, pronounced, exostosed 

 bony casque with the only free soft derm being that of the eyelids. 



Dimensions. — Head and body, 75.4 mm.; head length, 25.3 mm.; 

 head width, 25.2 mm.; femur, 32.5 mm.; tibia, 35.4 mm.; heel-to-toe, 

 47.8 mm.; hand, 20.8 mm. 



Color in alcohol. — Dark gray above, dirty white below. There is a 

 smattering of small, dark blotches on the back above the shoulder 

 region and faint reticulations of dark behind the angle of the jaw and 

 above the insertions of the arms. No really discernible pattern is evi- 

 dent on the specimen and one has an impression of a dark gray frog. 



Remarks. — We are greatly indebted to our good friend Dr. Gerardo 

 Reichel-Dolmatoff for the only known specimen of this rare form ever 

 to be taken in Colombia. 



Specimens Examined 

 COLOMBIA r 



NariSo: ImbiH, Rfo Mira, USNM 152754. 



ECUADOR: Guayaquil, USNM 12274 (type); Puna Island, SUNHM 6407; 



Esmeraldas Province, 30 km. north-northwest of Santo Domingo de los 



Colorados, JAP 1898. 

 PERU: Near Sullana, EK 6168. 



Family Leptodactylidae 



Omosternum and, usually, a free urostyle present. An arciferal 

 girdle except in the Rhinodermatinae. No Bidder's organ. Maxillary 

 teeth present or absent. 



