314 Frogs of the Okefinokee Swamp 



with dark brown spots; light yellowish or greyish brown without spots; any 

 medium shade of brown with green spots; olive green unspotted; light yellow 

 green spotted with brown; unspotted light pea-green; light greenish gray; 

 light fawn colour, or still lighter shades ranging down to flesh colour." 



"Most curious is the fact that although these changes take place under the 

 influence of various stimuH, such as light, moisture and heat, they may go on 

 without these stimuli. Frogs shut in a dark pail with no change of conditions 

 will not appear twice alike when the pail is opened at intervals during the 

 space of several hours. Some may be green and others brown; some spotted, 

 others not; some light while others are dark. And at any given time of 

 observation those that were dull and spotted before may be a light, unspotted 

 green, the ones that were Ught may be dark, and so on. The light line along 

 the jaw undergoes great changes also. This tree frog furnishes a most interest- 

 ing case for the study of metachrosis." 



VOICE 



Deckert (191 5, p. 3) at Jacksonville, Fla., describes its cry as follows: 

 "The cry is rather coarse, sounding like 'era, era, era', etc., with a second's 

 interval between each note." The same author (192 1, pp. 22) in Dade County, 

 Florida, "Their rasping calls were heard in May and June at 19th Street, 

 Miami, at Donn's nursery and at 22nd Street in company with the toads 

 mentioned previously. After heavy rains in July, August and September 

 they were heard also at Cocoanut Grove, Lemon City, Little River, Arch 

 Creek and Fulford." 



Pope (19 1 9, pp. 96, 97) at Houston, Texas, gives considerable details of 

 its calls. "The call is a harsh, rasping trill not so loud nor so musical as that 

 H. versicolor. From a distance the chorus resembles that of H. crucifer, but 

 the call is much harsher when heard close at hand. The throat pouch of the 

 male is large and expands to nearly the size of the body. . . . July 31. Have 

 heard a few frogs almost every night lately, calling from trees near sleeping 

 quarters. They do not begin to call until ten or eleven o'clock at night, a^nd 

 may continue intermittently till daylight. Usually a single one begins to call 

 and is joined by half a dozen or so more until there is quite a chorus." 



The first squirrel tree frog the writer ever heard came June 10, 191 7 

 beyond Tuskagee, Ala., and 30 miles from Montgomery. We went through 

 a fine series of lowland woods and over several wooden bridges. "Here first 

 saw Sabal serenoa. Heard Whiteeyed Vireo, Acadian Flycatcher, Carolina 

 Wren, Hooded Warbler, Southern Parula Warbler, Tufted Titmouse, Caro- 

 lina Chickadee, etc. ... In a moist field heard no end of Acris gryllus. After 

 dark heard another note which proved a male Hyla squirella. Took one on 

 top of a bush 8 feet high. Another we supposed high in a tree although we 

 found it on a bamboo-like cane 5 feet from the ground." 



In 192 1 we first heard them on July 21. "Probably the tree frog we heard 

 in Chinaberry tree at Mr. Rider's house during the storm was H. squirella, 



