FROGS OF COLOMBIA — COCHRAN AND GOIN 117 



ior border of eye; when limbs are laid along the sides, knee and elbow 

 touch; when hind legs are bent at right angles to body, heels slightly 

 overlap. Skin of upper parts minutely pustular, with some faint tuber- 

 cles on head and upper eyelids; venter smooth, with a few granules 

 around the vent; a short but heavy postocular crest, followed by the 

 narrow, elongate parotoid gland, about 1% times the length and one- 

 half the width of the eye; no skinfold across the chest; no ventral disk; 

 an external vocal sac in the male? 



Dimensions. — Head and body, 23.5 mm.; head length to angle of 

 jaw, 7.5 mm.; head width, 7.5 mm.; femur, 9.5 mm.; tibia, 10 mm.; 

 foot, 9 mm. ; hand, 7.5 mm. (Length of the type specimen was said to 

 be 20 millimeters.) 



Color in alcohol. — Dorsum Vandyke brown, with several large, 

 rounded, light bordered spots on either side of midline, the first of 

 these extending onto eyelids, the last more chevron-shaped and just 

 behind the sacrum; upper limb surfaces pale russet with wide seal 

 brown crossbars; venter drab with heavy sepia reticulations that are 

 closer together anteriorly; soles of feet and palms of hands drab, with 

 paler metacarpal and metatarsal tubercles; webs between toes pale 

 wood brown; sides of head wood brown, with several larger darker 

 spots along upper lip and in loreal region; sides of body mostly seal 

 brown, with a few small drab spots; traces of a pale longitudinal line 

 along dorsolateral region. 



Remarks. — In structure, Bufo hypomelas resembles the young of B. 

 blombergi except that it lacks the parietal crests of blombergi (such 

 crests are not always developed in young specimens) and the first 

 finger is slightly shorter than the second in hypomelas but is longer 

 in blombergi. Both species obviously are in the "guttatus" group, and 

 they represent the midget and the giant of that group. B. hypomelas 

 is only 23.5 millimeters long; the type of blombergi is 207 millimeters 

 long. 



The heel of AMNH 14031 reaches the posterior border of the eye, 

 while that of the type was said to extend to the tip of the snout. 

 The tympanum of the former is indistinct; in the latter it is moder- 

 ately distinct and equal to one-half the eye diameter. These differences 

 might be bridged if more material were available. The color pattern 

 of AMNH 14031 — where it remains — is like that shown in the figured 

 type specimen. 



With but a single specimen at our disposal, the range of variation 

 in critical measurements remains unknown. The very distinctive 

 color pattern of B. hypomelas makes it one of the easiest toads to 

 identify. 



337-262—70 9 



