314 U. S. NATIONAL MUSEUM BULLETIN 206 



superolateral, slightly projecting, their distance from end of snout 

 about four-fifths their distance from eye, separated from each other 

 by an interval equal to their distance from eye. Canthus rostralis 

 rounded; loreal region sloping considerably, forming a concavity 

 before meeting rim bordering upper lip. Eye large, prominent, its 

 diameter two-thirds its distance from end of snout; interorbital diam- 

 eter about 1)2 times the width of upper eyelid, equal to distance 

 between nostrils. Tympanum large, distinct, one-half the width of 

 eye, separated from eye by an interval equal to one-half its own 

 diameter. Fingers free, with faint lateral ridges, second and fourth 

 subequal, reaching to base of antepenultimate phalanx of third, first 

 longer, reaching nearly to base of last phalanx of third; a large pro- 

 jecting oval tubercle at base of thumb and a somewhat larger heart- 

 shaped one on the palm; the other subarticular tubercles well de- 

 veloped. Toes with lateral ridges, third longer than fifth, reaching 

 midway along antepenultimate phalanx of fourth; a small sharp 

 conical inner and a minute rounded outer metatarsal tubercle; a 

 glandular line along inside of tarsus scarcely becoming a ridge. Body 

 quite stout, in postaxillary region narrower than the head width; 

 when hind leg is adpressed, heel reaches to center of eye; when Hmbs 

 are laid along the body, Imee and elbow touch; when hind legs are 

 bent at right angles to body, heels overlap. Sldn of upper parts finely 

 glandular, thickening to a pair of broad, indistinct dorsolateral folds; 

 a very pronounced lateral fold from above arm to groin, the skin on 

 the sides and on the legs with many pustules and small tubercles; a 

 curved glandular ridge above and behind tympanum, ending in a wide, 

 heavy gland at corner of mouth and almost meeting the upper lip 

 ridge below the tympanum; venter smooth except for some weak 

 granules on lower femur and around anus; a distinct ventral disk. 

 Lateral folds on either side of throat indicating internal vocal sacs. 



Dimensions. — Head and body 50.5 mm.; head length 18 mm., width 

 18 mm.; femur 20 mm.; tibia 22 mm. ; foot 20.5 mm.; hand 12 mm. 



Color in alcohol. — Dorsum drab gray, with coarse black spots more 

 or less grouped in pairs down center of back; a black stripe along 

 dorsolateral folds; a wide brown stripe beginning at tip of snout, 

 covering the loreal region and continuing across tympanum to shoulder 

 bordered below by a white stripe along the upper lip ridge, which in 

 turn is bordered below by another dark stripe extending beneath 

 gland at corner of mouth ; arms and legs with black crossbars ; posterior 

 femur with large irregular marblings of dark brown, but without a 

 distinct light dark-bordered stripe on posterior femur as in L. mys- 

 taceus. Upper arm with a wide dark stripe on its anterior and pos- 

 terior surface. Soles of feet dark brown. Sides mottled with fight 



