FROGS OF COLOMBIA — COCHRAN AND GOIN 401 



without the bony rim or the tympanic disk found in frogs with true 

 external tympani. The pattern varies somewhat. The dorsal chevron 

 and the outlining dark lines are very much in evidence in AMNH 

 14008 and 14010 as well as in the type, while AMNH 14013-5, which 

 are smaller, are much darker. AMNH 14011, an adult having the 

 same length as the type, has a wide light middorsal stripe from tip of 

 snout to above anus, and it has the slanting dark lines across the 

 posterior back and sides as in the type. The belly is not always im- 

 maculate; it is covered with fine dark dots in four of these frogs. The 

 dark spots on the chin appear as a wide dark V in 4 examples, with 

 two or three narrow diagonal lines paralleling the areas of the V on 

 either jaw. 



The relationship of the new form to the surdus of Boulenger (1882a, 

 p. 212, pi. 14, figs. 3, 3a) from "western Ecuador" and "South Ameri- 

 ca" is quite obvious, but there are some differences. In the new form 

 the nostrils are only half as far from the tip of the snout as they are 

 from the eye, while in the nominate form they are equidistant from 

 these points. In the Antioquia frog the interorbital diameter is a 

 trifle greater than the width of the upper eyelid, but in the nominate 

 surdus the interorbital diameter is equal to the width of the upper 

 eyelid. The toes are faintly webbed hi all examples of the new sub- 

 species, but Boulenger says the toes are quite free in surdus (although 

 BM 71.4.16.46 has them faintly webbed). Boulenger describes the 

 dorsal skin of surdus as being smooth, but the northern representative 

 of the species has a definitely pustular skin, with small tubercles 

 above the shoulders and a single large median tubercle on the snout. 



A specimen (CNMH 44069) that was collected in Cisneros, Valle, 

 is so bleached that no pattern is apparent, but its structure and pro- 

 portions seem to be the same as those of the examples of E. surdus 

 cabrerai. 



We are pleased to dedicate this new form to Sr. Isadore Cabrera, 



zoologist and collector. 



Specimens Examined 

 COLOMBIA r 



Antioquia: Andes, AMNH 14009 (holotype) and 14008, 14010-1, 14013-5 



(all paratypes). 



Valle: Cisneros, CNHM 44069. 



Eleutherodactylus delicatus Ruthven 



Plate 57a-c 



1917. Eleutherodactylus delicatus Ruthven, 1917c, p. 1, pi. 1 (type locality, 

 San Lorenzo, 5,000 ft., Santa Marta Mountains, [Magdalena,] Colom- 

 bia) ; 1922, p. 53.— Gorham, 1963, p. 17. 



Description. — MZUM 54573, an adult female from San Lorenzo, 

 Magdalena, Colombia. No bony ridges on frontoparietal area. Vo- 



