FROGS OF SOUTHEASTERN BRAZIL — COCHRAN H 



postaxillary region a trifle wider than the head width; when hind legs 

 are adpressed, heel reaches center of eye; when limbs are laid along 

 the body, laiee and elbow overlap; when hind legs are bent at right 

 angles to body, heels overlap considerably. Skin minutely glandular, 

 with small scattered pits on the head and middorsal region; a bony 

 ridge above the tympanum but no glandular ridge there; a weak dor- 

 solateral fold along the sides; venter smooth. (No external vocal sac 

 apparent in the male.) 



Dimensions.- — Head and bod}^ 22 mm.; head length 7 mm., width 

 6 mm.; femur 8.5 mm.; tibia 9.5 mm.; foot 8 mm.; hand 6 mm. 



Mathematical analysis (in percentage of total length) : 



Color in alcohol. — Dorsum pale wood brown, with an indistinct 

 darker blotch between the shoulders; a dark brown lateral stripe from 

 axilla to groin; femur pale wood brown with a very wide dark brown 

 patch, continued (when legs are bent) across the centers of the tibia 

 and tarsus; venter light ochre, becoming darker posteriorly. 



Remarks.— A dozen freshly collected specimens from Alto da Serra, 

 near the type locality of Atelopus imitator, were compared with four 

 examples from Tijuca, which is in the city of Rio de Janeiro not far 

 from Corcovado, the type locality of Espada's original material. 

 A careful study failed to bring out any difl'erences of specific or sub- 

 specific value in the two populations. Miranda-Ribeiro states that 

 the Alto da Serra form is shorter, the largest specimen in his original 

 series of five measuring 23 mm., v/hile Espada's measurement is 26 

 mm., but it seems probable that in a larger series from Alto da Serra 

 this small difference might be bridged. He also mentions a "humero- 

 lateral fold" as defining A. imitator. If he meant to indicate the dorso- 

 lateral fold extending from the posterior corner of the eyelid to the 

 groin, then this fold is about equally apparent in the Alto da Serra 

 specimens and in those from Tijuca, appearing best in well-preserved 

 ones, and scarcely showing in the flabby, softened ones. There is no 

 true fold on the humerus or near it on the side of the body in any of the 

 fresh Alto da Serra frogs at hand. 



Since the Corcovado specimens on which the name D. b. ItUzi was 



