404 Frogs of the Okefinokee Swamp 



parts of fore legs citrine drab or buffy brown with black spots of fore edge 

 and rear edge distinct and small. Hind legs with vermiculation of buffy 

 olive, etc., and black on dorsum. On posterior thighs fine black and old 

 gold or olive lake. Rear thigh parts if viewed from venter suggest R. virga- 

 tipes somewhat and R. grylio. Throat of male sulphur yellow or pale green 

 yellow, rest of under parts seafoam yellow. Pupil rim green yellow; iris 

 finely spotted black and vinaceous tawny or xanthine orange. Thumb 

 somewhat enlarged. 



(From life July I4, 1923). Upper jaw solid courge green, cosse green or 

 lettuce green; also this color more or less predominant on head back to 

 tympanum. This color less prominent in back because of large black spots 

 which are outlined by these greens. Amongst these black spots are smaller 

 snuff brown spots. On hind legs are sulphur yellow or in places aniline yellow 

 vermiculating the black of the thighs and bounding the black cross bars of 

 the lower legs. More or less longitudinal bar on thigh bister or brownish 

 olive. On sides mixture of black, green yellow or even yellow-green and 

 hazel (very slightly). Upper parts of fore legs yellowish oil green with black. 

 Throat maize yellow or sometimes baryta yellow while the rest of underparts 

 are light chalcedony yellow. Some of the largest males may have maize 

 yellow on entire under parts. Iris as in description of male of June 18. 



Female {From life July I4, 1923). Several seem more spotted on under 

 part of hind legs than in males. Sometimes spots on either side of the throat. 

 Hazel of back more prominent and more hazel on sides and usually more 

 spotted on the head. Underneath they are white or whitish except for the 

 throat which may be pale chalcedony yellow or seafoam yellow. 



Structural differences. Some of the differences are : 



1 . Males have tympana larger than rarely equal to the eye while those 

 of the females are clearly smaller than or equal to the eye. For 

 example, extreme tympana may be as follows: cf 56 mm., tym- 

 pana 8 1/2 mm., eye 5.5 mm., or cf 56 mm., tympana 7.5 mm., 

 eye 6.5 mm., or cf 54 mm., tympana 8.5 mm., eye 7.5 mm. 

 Occasionally the tympanum may reach 10 mm. 



2. A pair taken at Hart Lake, Adirondack Lodge, July 14, 1923, 

 show the following differences in ventral coloration. The male's 

 throat has some maize yellow or baryta yellow while the rest of 

 the under parts are light chalcedony yellow; the female has a sea- 

 form yellow throat with some chartreuse yellow while the rest of 

 the under parts are white or whitish. 



3. Vocal sacs (see Voice). In a 57 mm. cf from Peterboro, N. Y., a 

 little inclination toward a sac back of tympanum. 



4. General coloration (see Mating coloration). 



5 . Tympanic borders prominent in male. Old males are often with 

 the tympanic border standing out prominently from the surround- 

 ing body. 



6. The males have the characteristic swollen thumb of our North 

 American Ranas. 



