154 bulletin: museum of comparative zoology. 



2. Bufo valliceps Wiegmann. 



Four specimens from Chichen-Itza taken during April. 



"This toad trills at a high pitch." Ives reports this toad from Yucatan 

 (Proc. Phil. Ac. Nat. Sci., 1892, 1891, p. 461). 



3- Bufo marinus (Linne). 



Seven examples from Chichen-Itza, Yucatan. 



Both B. marinus and B. valliceps were common in the cenotes, and were 

 often found about watering troughs at the house as well. They were breed- 

 ing in February, and on Feb. 19 eggs were observed, though it is uncertain to 

 which species they belonged. By March 18 the tadpoles had reached a length 

 of 2 cm. or so in the Sacred Cenote, and had become scattered about instead of 

 swimming in dense schools as before. Mr. Thompson says that when the toads 

 come to the cenotes to breed they plunge directly off from the top of the verti- 

 cal walls to the water 65 feet below. The old toads after breeding and the 

 young toads also appear to get out by working their way laboriously up the 

 walls, taking advantage of the small irregularities. 



4. Hyla phlebodes Stejneger. 

 Proc. U. S. Nat. Mus., 1906, 30, pp. 817, 818. 

 Two examples from Chichen-Itza, compared with the type by Dr. Stejneger. 



5 Hyla baudinii Dumeril & Bibron. 



One example taken March 22, at Chichen-Itza, Yucatan. 



"Call of this species a resonant kwa, kwa, kwa (a as in father). Most fre- 

 quently heard in a tall cocoanut-palm. At night they come down to among 

 the challote vines which grow about the water tank. The note is pitched low, 

 but is of a far-reaching quality. Usually uttered three or four times in suc- 

 cession, at intervals of perhaps five minutes." 



6. Triprion petasatus (Cope). 



One specimen taken at Chichen-Itza, March 28. 



" Note an unmusical, rather drawn-out quarr — quarr — quarr. Not guttural,, 

 but with a rasping quality. Life colors as follows : Top of head fuscous, with 

 silvery greenish gray dots; back silvery gray, with dark fuscous blotches and 

 smaller spots; sides with yellowish green suffusion; arms and legs brown, 

 with yellowish blotches on upper arms and legs; silvery gray on lower arms 

 and legs. Under sides whitish. The gray has a decided greenish tinge, which 

 became more marked in a short time while the creature was held in the 

 hand. This frog was not heard during the drier part of the season (February 

 and most of March), but was heard quite frequently during the last part 

 of March, when there was more rain." 



