FROGS OF COLOMBIA — COCHRAN AND GOIN 191 



Dimensions. — Head and body, 63.2 mm.; head length, 24 mm.; 

 head width, 19.8 mm.; femur, 36.5 mm.; tibia, 44.2 mm.; heel-to-toe, 

 56.8 mm.; hand, 22 mm. 



Color in alcohol. — A dark chocolate brown frog with rather distinct 

 transverse bars of a darker hue across the top of the head and the 

 back. These transverse dorsal bands vary in width from one to four 

 millimeters, and there are four such bands across the head and eight 

 across the back, those on the back being wider than those on the head. 

 The entire side of the face from the tip of the snout to the tympanum 

 is a dark brownish black. The thighs, shanks, tarsal portion of the 

 feet, and forearms are crossed by dark bands similar to those on the 

 back, but these bands are less conspicuous on the limbs than they are 

 on the dorsum. The ventral surfaces are a dirty brown with distinct 

 pale spots present on the throat and breast. The webs on the feet are 

 dark. 



Variation. — The series at hand are rather constant in the presence 

 of a conspicuous white border along the margin of the upper jaw, a 

 transverse white line above the vent, and white blotches in the pec- 

 toral region. Otherwise, they are quite variable in pattern. In dorsal 

 ground color they range from pale gray to nearly black, although most 

 are medium to dark brown dorsally. While crossbars are fairly con- 

 spicuous on top of the head and dorsum of most, in some the dorsal 

 ground color is practically uniform. Three of the specimens at hand 

 have a dark dorsal median stripe running from the tip of the snout 

 posteriorly to above the urostyle. In most of the specimens this stripe 

 is lacking. The posterior surface of the thigh is rather uniform on 

 most specimens, but on several of them an inconspicuous but distinct 

 row of white spots can be seen; and in one specimen (FM 7r), which 

 is probably from Cafio Guapaya, Serrania de La Macarena, there are 

 scattered, small but distinct white spots on the rear of the thighs. In 

 some specimens the disks of the first, second, and third fingers are 

 distinctly capped with bright yellow. 



The largest specimen at hand is a female that measures 83.2 milli- 

 meters in head and body length. 



Remarks. — There seems to be no doubt that lanctformis Cope of 

 eastern Colombia, Ecuador, Peru, and western Amazonas in Brazil, 

 boans Latreille of southeastern Brazil, and multifasciata Giinther 

 of Para, Brazil, the Guianas, and the eastern Venezuelan Guayana 

 are three very closely related forms, differing primarily in details of 

 pattern as follows: 



land for mis: Upper lip broadly and conspicuously margined with white, posterior 

 and ventral surfaces of thigh dark and with tiny, scattered white spots. 



boans: Upper lip narrowly but not conspicuously margined with white, posterior 

 surfaces of thighs with distinct, scattered, rounded white spots. 



