50 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



than fifth ; subarticular tubercles well developed ; two strong metatarsal 

 tubercles; a number of small but distinct plantar tubercles; a very 

 weak tarsal ridge ; bent limbs being pressed along sides, knee and elbow 

 overlap; hind limb being adpressed, the tibio tarsal articulation reaches 

 the anterior corner of the eye; hind limbs being placed vertically to 

 axis of body, the heels overlap considerably ; no dorsolateral glandular 

 fold; skin above shagreened, with scattered irregular glandules espe- 

 cially prominent on back and sides; a faint middorsal glandular 

 ridge extending from in front of the eyes nearly to the anus; ventral 

 surfaces smooth, excepting posterior aspect of femur, which is coarsely 

 granular. 



Dimensions: Tip of snout to vent, 26 mm..; width of head, 12 mm.; 

 tip of snout to posterior border of tympanum, 12 mm.; width of eye, 

 4.5 mm.; width of tympanum, 2.5 mm.; foreleg, 20 mm.; hindleg, 

 48 mm.; vent to heel, 28 mm. 



Color (in alcohol): Above drab to fawn color; the sides heavily 

 reticulated with chocolate ; loreal region pale chocolate ; the tip of the 

 snout pale drab, with a wide stripe of the same hue going backward 

 along the canthal region, over the outer edge of the upper eyelid and 

 along the dorsolateral region to the sacrum where the stripes are 

 lost in the prevaiHng light-drab tone of the posterior part of the 

 back; a mottled chocolate tone from in front of the eyes down the 

 back to the sacrum; limbs pale drab, except the concealed surfaces of 

 the hind legs, which are coarsely reticulated with chocolate; lower 

 surfaces pale drab. 



The color of a recently killed frog from Samand (U.S.N. M. No. 

 74983) was as follows : Posterior portion of back and region above anus 

 light burnt carmine. The same color appears on the upper portion 

 of the tibia. The upper femur has a faint indication of this color 

 toward the knee, but is mostly flesh color. The lateral light stripes 

 anteriorly are Hght sulphur-yellow. The dark areas are deep chocolate. 



Variations.— Its distinctive color pattern makes this frog one of the 

 easiest to identify of all the Eleutherodactyli. There is practically 

 no variation in the general placing of the pattern, and even the youngest 

 frogs are as heavily marked as the adults. In some frogs the chocolate 

 dorsal tone is somewhat more mottled in appearance and invaded 

 posteriorly by the light ground tone. This is substantially the only 

 noticeable variation. The nearly immaculate legs offer an unusual 

 feature in this genus. 



The largest specimen (No. 74630 from Rio San Juan) measures 41 

 mm. from snout to vent. From the same collection is a cluster of 

 eggs taken on March 17, 1928. This bunch has 14 adhering eggs of 

 two sizes — a few small ones 4 mm. in diameter, the rest larger, measur- 

 ing 6 mm . In this latter group the head of the young frog is already well 

 developed, and the remainder of the attenuated body may be seen 



