54 , Journal of Entomology and Zoology 
It is unfortunate that no more transformed individuals were available for the 
toad, the per cents recorded for it are probably not worth a great deal; however, the 
fact that no aquatic forms were found even in the five individuals studied is sug- 
gestive and made understandable by the fact that young toads soon-leave the ponds 
by hundreds and at transformation time can be seen traveling toward the higher 
ground in all directions. The absence of aquatic or even doubtful forms in both 
species of Hyla can probably be substantiated by the examination of larger numbers; 
for young tree-frogs and peepers climb on plants above the ponds in which their larval 
life was spent and, sitting on the leaves and branches of Iris, of shrubbery, or what- 
ever is available, are ready to catch insects that crawl over the plants or come flying 
to them. 
It is noticeable, too, that the distribution of the forms eaten through many families 
and orders is not nearly so great for these smaller species as for the species of Rana. 
Dr. Wright® has shown that for the Ithacan Anura the average lengths at transforma- 
tion are as follows: 
Bitfowanmentcanusc; viewed tee pace os 9.6 mm. 
Lg laeUerstcOlor: eo crc eaten Neer oe elke esa ees 16:0 
EL y lay Cri ctfer’ Oy. cascade oer eet re eines be iets) 
RAURGSPIPLONS pre velnace Sos ietsrnste sts eget ee 24.0 “ 
Rana palustris. cnc occas asa ee ee oom 
Ramassylvaneas orcas ah aeisays «sve toishsl Meese sa UG: Oteee 
Rana clamstans cars wore cicr hae a ee 132.0 ‘ 
Rama catesbetand a .ciecaier s [ass ois toeror ce erie aes cdi) 
The smaller size of some species naturally limits their food somewhat. The habit 
in both species of Hy/a of sitting on plants, and their failure to hop about over the 
ground as do some of the other forms may also have much to do with the explanation 
of their eating fewer kinds of insects and other invertebrates such as spiders and 
sow-bugs. 
In the genus Rana a general tendency toward the habits of the adults is to be 
observed; although the green-frog is a marked exception. One would expect young 
bull-frogs to eat a rather large per cent of aquatic forms and the rather low per cents 
given in Table 2 for the wood-frog and meadow-frog are not surprising. But the 
remarkably low per cent for the green-frog was hardly to be looked for. In this con- 
nection a comparison with the data given by Surface’ for the adult forms may be of 
interest. His report lists the stomach-contents of 29 bull-frogs, of 107 green-frogs, 28 
wood-frogs, 88 pickerel-frogs, 51 meadow-frogs, 17 peepers, 22 tree-toads, and 52 
toads. By making a rough estimate of the forms which he lists I find that the com- 
parison with the newly transformed is as follows: 
®Wright, A. H., 1914. T,ife-histories of the Anura of Ithaca, New York. Carnegie Institu- 
tion of Washington. 
°Surface, H. A., 1913. Economic features of Amphibians of Pennsylvania. Zoological Bull. 
Pa., Dept. of Agriculture, 3;67-152. 
