38 U.S. NATIONAL MUSEUM BULLETIN 2 88 



Phyllobates boulengeri (Barbour) 



Plate 7a-p 



1905. Prostheraspis femoralis (not of Boulenger, 1883) Barbour, p. 101 (type 



locality, Gorgona Island, Colombia). 

 1909. Prosthcrapis boulengeri Barbour, p. 89 (type locality, Gorgona Island). — 



Barbour and Loveridge, 1929, p. 323.— Gorham, 1963, p. 25. 

 1926. Phyllobates boulengeri. — Parker, 1926, p. 553. 



Description.— USNM 52406 [formerly MCZ 2422, part; cotype of 

 boulengeri], an adult female with eggs, from Gorgona Island, Colombia. 

 Width of tongue about one-half that of mouth opening, spatulate, 

 with a very minute indentation on its free posterior border; snout 

 rather short, broadly truncate at the tip when seen from above, 

 rounded in profile, the upper jaw extending well beyond lower; 

 nostrils lateral and well below the canthal angle, their distance from 

 end of snout slightly over half their distance from eye, separated 

 from each other by an interval of about 1% times their distance from 

 eye. Canthus rostralis rounded but distinct; loreal region flat, with 

 a deep furrow along the edge of the lip, which flares out a little below 

 it. Eye large and prominent, its diameter equal to its distance from 

 tip of snout; interorbital diameter about 1% times the width of 

 upper eyelid, but narrower than distance between the nostrils. 

 Tympanum distinct, about one-half the diameter of eye and located 

 immediately behind it. Fingers long, free, not ridged laterally, first 

 finger a little longer than second, disk of third finger covering about 

 one-fourth the tympanum; subarticular tubercles of fingers large; a 

 small palmar tubercle; toes not webbed, with narrow lateral ridges, 

 third toe much longer than fifth, extending beyond base of ante- 

 penultimate phalanx of fourth; disk of fourth toe covering one-fourth 

 the tympanum; a weak tarsal ridge, ending in a diagonal gland 

 across the tarsus proximal to the metatarsal tubercles; a small inner 

 and a smaller outer metatarsal tubercle; subarticular tubercles of toes 

 smaller and less evident than those of fingers. Body moderately elon- 

 gate, in postaxillary region slightly less than greatest head width; 

 when hind legs are ad pressed, heel reaches to posterior corner eye; 

 when limbs are laid along the sides, knees and elbows slightly overlap ; 

 when hind legs are laid at right angles to body, heels fail to touch. 

 Skin not easily torn, smooth (minutely pustular) above and below; 

 venter with a few granules beneath anus, and a pair of small flaps 

 above it. 



Dimensions. — Head and body, 19.5 mm.; head length, 7 mm.; 

 head width, 6.5 mm.; femur, 8.5 mm.; tibia, 8.5 mm.; foot, 8.5 mm.; 

 hand, 5.5 mm. 



Color in alcohol. — Bleached to a nearly uniform pale ecru drab, 

 but with traces of a sepia stripe on the side of the head from nostril 



