404 U.S. NATIONAL MUSEUM BULLETIN 2 88 



than its distance from tip of snout; interorbital diameter 1% times 

 that of upper eyelid, equal to interval between nostrils. Tympanum 

 small, its greatest diameter slightly over one-half that of eye, sepa- 

 rated from eye by an interval equal to two-thirds its own diameter. 

 Fingers moderate, with lateral ridges, free, first finger shorter than 

 second, fourth longer than either and reaching to base of disk of 

 third, which covers three-fourths the tympanum; a small oval thumb 

 pad present; a large flat palmar callus; metacarpal tubercles well 

 developed. Toes free, moderate in length, third toe shorter than fifth, 

 the disk of which reaches base of antepenultimate phalanx; disk of 

 fourth toe covering entire tympanum, larger than that of third finger; 

 a large oval inner metatarsal tubercle and a minute outer one; tarsal 

 ridge represented by a short, elongate gland just above inner 

 metatarsal tubercle; a heavy skinfold on heel and knee. Body short, 

 thickset, in postaxillary region slightly narrower than greatest width 

 of head. When hind leg is adpressed, heel reaches posterior corner of 

 eye; when limbs are laid along the sides, knee and elbow are widely 

 separated; when hind legs are bent at right angles to body, heels just 

 touch. Skin of upper parts finely granular all over, with a somewhat 

 elongated series of glands between the eyes and others in chevron- or 

 X-shapes on back; chin and chest very finely granular; belly coarsely 

 granular, including lower surfaces of femur and area around anus; 

 an irregular glandular ridge from posterior corner of eye above 

 tympanum, ending above shoulder; a slight skinfold across chest, and 

 evidences of a ventral disk in the loose skin along the sides; a trans- 

 verse external vocal sac in the male. 



Dimensions. — Head and body, 31.5 mm.; head length, 10.5 mm.; 

 head width, 12.5 mm.; femur, 12 mm.; tibia, 13.5 mm.; foot, 13 mm.; 

 hand, 9 mm. 



Color in alcohol. — Dorsum uniform deep Indian purple; venter 

 dirty buff , the anterior femur and groin pale cream-buff (geranium 

 pink in life) ; posterior femur immaculate clay color, probably also 

 pink or red in life. Upper lip pale Indian purple without indication of 

 spots. 



Remarks. — This little frog is common and apparently gregarious 

 where it occurs. The pink or rose-red sides and concealed limb sur- 

 faces, so characteristic of most living individuals, fade quickly to 

 yellowish-tan or grayish-white in preservative. Some have mottled 

 backs, or a narrow middorsal light stripe, or a pair of wider dorso- 

 lateral stripes. Adult males usually have the anterior half of the chin 

 slate-colored. 



The belly is heavily granular in practically every individual. The 

 adpressed heel reaches between the posterior edge of the tympanum 

 and the posterior corner of the eye in more than 80 percent of the frogs. 



