414 



rain. The calling station is rock slopes in stream beds. On 

 these places there is a strong flow of water during rains, and they 

 are dry on dry nights or in the dry season. The eggs are appar- 

 ently laid in small water-holding crevices on such slopes. The 

 calling dates to follow should be compared with the rainfall 

 schedule, and especially note their absence when much rain falls. 

 They appeared first November 24. The note is a gutteral 

 croak. Eggs were laid in the laboratory. They are 2 mm. in 

 diameter, the capsule being 5 mm. in diameter. They stick to 

 the bottom of the dish. Called again November 29 'awk ek ek;' 

 laid again in laboratory; some eggs were in a floating film; calling 

 December 2, 3, 5 (they were calling before a rain and stopped 

 when rain began), 11, 12, 13, Feb. 9, 10, 15. None at all were 

 seen or heard in July or August. 



Hyla venulosa (Laurenti). 



This has been seen from Punta Paitilla. 



Hyla albomarginata Spix. 



. This is found only around the stream at Zetek 3 and from there 

 to Armour 9, in the thicket of Ananas magdalenae. The note 

 is a loud explosive 'bop.' They were heard calling on December 

 3, 9, 21, and August 1. 



Agalychnis dacnicolor (Cope). 



What 1 believe to be this species is known only from the hollow 

 in the big tree on the Van Tyne trail. Two lots of large eggs 

 were hanging here December 14 (heavy rains took place Decem- 

 ber 8. and 9) . Large tadpoles (not from these eggs) were taken 

 from the hole on December 17 and by December 23 had devel- 

 oped so far that they were definitely not callidryas, calcarifer, or 

 spurrelli, since the webbing of the fingers was too slight. Under 

 these circumstances I pronounce them dacnicolor until adults 

 shall confirm or contradict my diagnosis. 



Agalychnis callidryas (Cope). 



There is a colony of these in the pond near the junction of 

 Van Tyne-Chapman. Here they were heard calling December 

 18 -and' 19, and July 19 and 25. The note is 'tlock.' They call 

 from about six to eight feet up in the trees. 



