FROGS OF COLOMBIA — COCHRAN AND GOIN 67 



band across the anterior half of the belly, the remaining half being 

 wood brown with many round dark spots scattered over it, these 

 spots being black on the dark area and sepia on the lighter area. 



Remarks. — In the examples at hand, variation in the critical 

 measurements is not excessive, being from 4.3 to 8.3 millimeters. 

 The toes usually show distinct traces of webs, from about one-eighth 

 to nearly one-fourth the length of the fourth toe. The first and second 

 fingers are subequal in 14 frogs, and the first finger is decidedly 

 shorter than the second in three others and is not fully developed 

 in a juvenile. The heel reaches to the posterior border of the tympanum 

 in most specimens and to the posterior corner of the eye in one 

 example. The tibia is proportionately shorter in this subspecies than 

 in any other known Colombian Phyllobates except mertensi, a larger 

 and much different frog. 



The ventral pattern is nearly the same in all examples from Laguna 

 de Tota. The dark ventral spots are more densely grouped in some, 

 and more widely scattered and less evident in a few. SUNHM 20298 

 is paler than the others and has three dark longitudinal lines on the 

 back, the median one encircling a pale diamond-shaped spot behind 

 the occiput and the two outer ones bordered below by a pale stripe 

 beginning in a wide light area covering the glandular swelling behind 

 the eye, then narrowing above axilla and continuing diagonally to 

 groin. This latter stripe is not continuous with the one on the lower 

 anterior femur, as a narrow black ring encircles the leg at its insertion. 



Distinct traces of Saturn red can be seen on the lower surfaces 

 of arms, hands, thighs and feet of specimens in the series USNM 

 150711-4 from Tunja. In one of these, the central part of the belly 

 is immaculate; in the others large dark dots appear, with a sprinkling 

 of very fine dots around them. In all of the Tunja frogs the chin has 

 few to many brown dots, but the throat and chest are immaculate, or 

 nearly so. 



The nominate form of subpunctatus is known at present only from 

 Cundinamarca and Meta. Its tibia is usually longer than that of the 

 Boyaca form, averaging 43.7 percent of the total length in the 48 

 examples measured. Average length of tibia in the Boyaca form is 

 41.2 percent. The heel consequently reaches the eye in 63 percent of 

 true P. subpunctatus, and to the tympanum or shoulder in 37 percent 

 of P. s. walesi. The webs on the toes are much less strongly developed 

 in the latter. 



The Boyacd frogs are darker in color, and the wide light dorso- 

 lateral stripes, so obvious in most Cundinamara examples, can be 

 made out only in one or two specimens of P. s. walesi. The dark 

 spots on the belly, however, are much more apparent in walesi. The 



