268 Frogs of the Okefinokee Swamp 



spectively are recorded. This evidence thus far might be interpreted in two 

 ways: ist years old 20-27 mm., or 20-30 mm., 2nd years old 27-39 mm. or 

 30-42 mm.; 3rd year olds 41-46 mm. or 44 mm. Beginning with the larger 

 sized series, we have the following evidence. On July 15, 1922, we took 45 

 mm. and 55 mm. specimens, apparently two groups, 3rd and 4th year olds. 

 In June, 191 1, we have 44, 44, 46, 48 mm. specimens and 55 and 59 mm. 

 specimens, two groups, again distinct groups. But on June 2-6, 19 12, we 

 have a flowing series of 47, 48, 50, 50, 52, 54, 54, 56, 58 mm. specimens. We 

 might interpret them all of one year 47-58 mm., or in the light of other ma- 

 terial break the third year olds either at 49 or 55 mm. We have nine col- 

 lections where none of the individuals are below 50, 51, 52 or 53 mm. and 

 these reach to 63. In this group 55 mm. is the mode with 57 mm. and 52 mm. 

 next in order of frequency. In the lower group 45 mm. and 48 mm. are the 

 modal points. In the 30-39 mm. ranges 38 mm. is the modal point. 



If modal points be used the age groups are 11.5 mm.-i7 mm. transforma- 

 tion; 20-30 mm., I year olds, 24 mm. mode; 33 mm.-42 mm., 2 year olds, 

 38 mm. mode; 45 mm.-5o mm., 3 year olds, 48 mm. mode; 51-59 mm., 4 

 year olds, 55 mm. mode; 63 mm., 5 year olds. On the basis of absent meas- 

 urements and other data we might interpret the groups thus: of these 103 

 frogs II. 5-17 mm. at transformation, 17-27 mm. one year olds; 27-39 mm. 

 as two year olds, no 40 mm. specimen; 41-48 mm. three year olds, no 49 mm. 

 specimen; 50-60 mm. four year olds, no 61 or 62 mm. specimens; 63 mm., 

 five year old. 



FOOD 



Holbrook (1842, Vol. IV, p. 121) reported that "They feed on various in- 

 sects, especially the common fly, which they seize with great adroitness, 

 leaping a foot or more to secure it." 



Dr. Vernon R. Haber has examined all our material. In his paper on 

 "The Food of the Carolina Tree Frog, Hyla cinerea Schneider" he sum- 

 marizes the food as follows: 



"The Carolina tree frog, Hyla cinerea Schneider, habitually is arboreal, 

 at least non-aquatic, excepting during mating and hibernating periods. 



"The younger forms rapidly adapt themselves to a type of diet which is 

 characteristic of the adults of the same species, as is revealed in table 2. 



"Habitually frogs of this species feed upon characteristically non-aquatic 

 forms until they are absolutely obHged to resort to water for breeding pur- 

 poses. They may take a few aquatic forms while en route to and from the 

 breeding places, for most of the aquatic forms could have been taken above 

 the water surface, as explained in the text. It is doubtful that frogs of this 

 species feed while mating. 



"It is not hkely that these frogs while in the water for mating purposes 

 had taken terrestrial forms which had fallen into the water, for if such had 

 been the case, it seems that they also would have taken a larger percentage of 

 aquatic forms which habitually swim about upon or near the water surface. 



"The diet of this species of frog includes such destructive forms as those 

 listed in table i. Of the five families of destructive Orthoptera, representa- 



