38 



BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



belly granular; a large patch of coarse granules on the posterior 

 aspect of the thighs, the remaining skin of the legs being quite smooth; 

 an external vocal sac at the center of the throat, the loose skin 

 terminating in a transverse fold across the chest between the arms. 



Dimensions: Snout to vent, 30 mm.; width of head, 11 mm.; 

 diameter of eye, 4 mm.; diameter of tympanum, 2.5 mm.; foreleg 

 from axilla, 21 mm. ; hindleg from vent, 52 mm. ; vent to heel, 31 mm. 



Color (in alcohol): Body color olive-gray to drab-gray above and 

 below; an irregular clove-brown interorbital bar; canthus rostralis, 



Figure 11. — Eleutherodactylus flavescens: a. Dorsum; b, inside of mouth; c, underside of foot; 

 d, underside of hand; e, side of head. U.S.N.M. No. 65697, from Samana and Laguna 

 Dominican Republic. Twice natural size. 



upper border of ear, center of back, and lateral regions with a more 

 or less coarsely reticulated pattern of clove-brown; upper surfaces of 

 arms and legs with irregular smaller spots of clove-brown, wliich do 

 not make a definite cross-barred pattern except on the forearm; 

 lower surfaces immaculate except for some spots around the edge of 

 the lower jaw. 



Variations. — The largest frog, U.S.N.M. No. 74959, measures 33 

 mm. from snout to vent. The yomig have very wide heads in pro- 



