52 Alexander G. Rutiiven 



as long ; snout rounded, with rounded canthus rostralis, longer than diame- 

 ter of orbit; nostril equally distant from eye and end of snout. Inter- 

 orbital space much narrower than upper eyelid ; tympanum about one-fourth 

 the diameter of orbit. Fingers free, first shorter than second; toes free; 

 disks moderately developed, that of the third finger larger than the ear; 

 metatarsal tubercles small. The hind limb being carried forward, the tibio- 

 tarsal articulation reaches between the eye and nostril. Skin smooth above 

 and below, except that the region of the tympanum is granular; a glandular 

 fold above the ear. 



Green above, with black markings consisting of two spots on the snout, 

 a cross band between the eyes, two streaks on the occiput, a W-shaped 

 mark on the shoulders, followed by some short, irregular bands. Sides of 

 head paler, with black bands radiating from the eye, one along the canthus 

 rostralis, two downward and one along the auricular fold, the first three 

 narrowly bordered with greenish white. Sides of body pale green with 

 irregular markings. Chin and throat pale drab with small, white spots ; 

 lower surfaces elsewhere white, in some specimens bright yellowish-green 

 in life. 



Type specimen, total length 33 mm., hind-leg 59 mm., head 12 mm. 



Type Specimen: Museum of Zoology, University of Michigan, Catalog 

 No. 54,528; Quebrada Viemes Santo (5,000 feet), San Lorenzo, Santa 

 Marta Mountains, Colombia; July 16, 1920; Alexander G. Ruthven, 

 collector. 



Habitat: Most often found under rocks in shallow streams, occasion- 

 ally under leaves on the bank of streams, 5,000 to 8,200 feet, San Lorenzo. 



Notes on Paratypes: The paratypes show little variation. In nine 

 specimens the ear is from one-fourth to one-third the diameter of the eye 

 and the heel reaches the anterior margin of the eye or the end of the snout 

 when the hind limb is extended along the side. The ground color of all 

 specimens is green, and the dorsal markings show a tendency to form longi- 

 tudinal bands in some individuals. 



Remarks: This species is apparently near Bleiithet'odactylus sitrdus 

 Boulenger, from western Ecuador. As far as shown by the description of 

 the latter, it differs in having an exposed, although somewhat indistinct, 

 tympanum and a much narrower interorbital space. 



Bleiitherodactylus megalops Ruthven. ^^ — San Lorenzo, 5,000 to 8,000 

 feet; heights east of San Miguel, 6,000 to 7,000 feet (M. A. Carriker). 

 Only observed among leaves on the forest floor. On San Lorenzo very 

 common from 5,000 to 7,500 feet; above 7,500 feet found in small num- 

 bers; not observed in the cleared area between 8,000 to 8,300 feet. It is 

 possible that the species is debarred from the latter habitat by the more 

 open conditions and that it reaches higher elevations in the heart of the 

 range. (PI. XII, fig. 3.) 



During the day what was apparently the song of this species was heard 

 constantly throughout June and July, but the eggs could not be discovered. 



^^ Occ. Papers, Museum of Zoo]., Univ. of Michigan, No. 39. 



