472 PROCEIEIDTNGS OF THEi NATIONIAL MUSEUM vol. loi 



Collection data. — The specimen was singing in the river when it 

 was collected at 9 : 10 p. m., April 29, 1946, by W. S. Miller. 



Diagnosis. — A large Hyla (53 mm.) distinguished from h. histincta 

 by having the gray reticulation of the sides entirely broken up into 

 elongate black blotches ; tarsal fold moderately elevated. 



Description. — Head as broad as long; nostril closer to tip of snout 

 than eye; tympanum quite distinct and as wide as third finger pad; 

 strong fold above tympanum, curving down to terminate above the 

 arm; canthus distinct but rounded, terminating bluntly on snout; 

 ostia of vocal pouches elongate, lying to side of but not beneath tongue ; 

 tubercles and webbing of hand not significantly different from those 

 of i>. histincta; indistinct outer metatarsal tubercle; moderate over- 

 lapping of heels when thighs are at right angles to body and limbs 

 folded ; tarsal fold sharp and distinct, extending almost to tibiotarsal 

 joint; heel reaches to or slightly beyond anterior border of eye. Dor- 

 sum universally and finely granular; venter pebbly, giving way to 

 coarse tubercles and rugosities on throat; ventral surface of thighs 

 smooth except for a median posterior pebbly area, which extends to the 

 posteroventral aspect of the thigh. No anal fold; no true anal 

 tubercles, although there is a small patch of more distinct pebbly ele- 

 vations on each side of and beneath anal orifice. 



The animal is a nondescript dark brown dorsally (fig. 93, d) , giving 

 way to creamy areas on the sides. These lateral creamy surfaces are 

 marked with distinct, sharp-edged, well-separated black blotches; 

 dorsum of femur is of the dark ground color broken by creamy patches 

 mingled with black irregular blotches. These broken areas are found 

 on the anterior and posterodorsal areas of the femur; dorsal tibial 

 surfaces colored same as back with quite indistinct small black spots 

 scattered over the surface ; tympanal fold and the anterior surface of 

 the sides marked with a black band ; feet and hands lighter in color 

 distally; ventral surface of body and extremities cream colored with 

 occasional small gray spots on the distal surface of the thighs. 



Measurements in millimeters. — Total length 53 ; head length 20 ; 

 head width 20; width of upper eyelid 6.5 ; interorbital width 4.5 ; eye- 

 nostril 5.0; nostril-tip of snout 2.5; greatest diameter of tympanum 

 3.0 ; between nostrils 4.0 ; between choanae 6.0 ; width of third finger 

 pad 3.0 ; width of fourth toe pad 2.0 ; length of tibia 28.5. 



Remarks. — Miller says of the living specimen: "Reddish-brown 

 back with tiny black spots'; black and white spotted sides and rump." 



Aside from the distinctive color pattern, there were no consistent 

 anatomical differences apparent. 



A tadpole of this species (U.S.N.M. No. 123690) was caught hop- 

 ping on the bank half an hour before the type specimen was taken. It 

 has a body length of 22 and a tail length of 21 mm. Black spots are 



