222 XJ. S. NATIONAL MUSEUM BULLETIN 2 06 



of upper parts quite smooth except for a few small tubercles on upper 

 eyelid, snout, and coccyx, and a faint median glandular line on top of 

 head; a weak post-tympanic diagonal ridge, with three or four large 

 tubercles behind the corner of the mouth; a very slight indication of a 

 low, wide dorsolateral glandular ridge; venter smooth, excepting for a 

 large patch of coarse granules behind anus extending halfway along the 

 lower surface of femur. A ventral disk indicated by a weak ventro- 

 lateral skin fold. 



Dimensions. — Head and body 33 mm.; head length 11 mm., width 

 11 mm.; femur 14 mm.; tibia 15 mm,; hind limb 47 mm.; fore limb 21 

 mm. 



Color in alcohol. — Dorsal ground color cream-buff; a narrow choco- 

 late line along canthus, and a triangular chocolate mark from eye to edge 

 of lip, followed by two smaller diagonal dark marks to corner of mouth; 

 a very irregular series of dark spots from behind eye along dorsolateral 

 region, the largest of these spots coming above the shoulder, with 

 another diagonal one on the side running down to the groin; some 

 coarse dark spots along the sides beginning in the axUla; upper surface 

 of fem.ur with two or three narrow, hregular, diagonal crossbars; upper 

 tibia and upper arm immaculate except for a few scattered dark spots; 

 foot and forearm indistinctly barred and spotted; venter drab-gray, 

 with faint darker suffusions over chest, throat, belly, and lower leg 

 surfaces; upper surfaces of digital disks darkened. 



Remarks. — This frog is indeed very distinct from other known 

 Brazilian leptodactylids. It has a decided similarity, however, to 

 Eleutherodactylus latidiscus, from Panama, in which species the disks 

 are very large on the outer fingers and toes and much reduced on the 

 inner ones, although not to such an extent as in B. lactea. The snout 

 is also of a similar shape, while the vomerine tooth patches are alike 

 in size and position. The palatine ridge in latidiscus is likewise 

 roughened into small odontoid serrations which can readily be felt with 

 the head of a pin. The size of latidiscus is greater, its digital disks 

 are not so distinctly incised, and its color pattern is somewhat different 

 from that of Basanitia lactea. After additional examples of the latter 

 have been collected and carefully compared with aU the tropical 

 American eleutherodactylids, it may be advisable to include them all 

 under the same generic name. 



Specimens Examined 

 BRAZIL; 



Rio de Janeiro: Montserrat, Campo Belle, USNM 96937, A. Lutz, February 

 1924. Teres6polis, USNM 121634, B. Lutz and Venancio, December 1940. 

 Sao Paulo: Iguap6, MP 828 (type), Edwall. 



