270 Frogs of the Okefinokee Swamp 



todes which were found in the alimentary tracts were Cosmocerella 

 haberi Steiner. Three other new species of nematodes were found in the 

 bodies of these frogs. They are to treated at greater length in an ap- 

 propriate journal elsewhere at some future date. (See Steiner, G., Some 

 Nemas from the Alimentary Tract of the Carolina Tree Frog (Hyla 

 carolinensis Pennant) Journ. Parasitology, Sept. 24, 1924, Vol. XI, 

 pp. 1-32). 

 7 per cent of these frogs were Opalina infested. 



"In their feeding habits frogs of this species have tendencies which are of 

 beneficial economic importance. Rather frequently complaints are registered 

 concerning the presence of certain insect enemies of florists in greenhouses, 

 etc. Doubtless several dozens of the species of smaller tree frogs which 

 are common to a locality, if kept in such places would materially aid in keep- 

 ing down plant-lice, certain kinds of moths, beetles, mites, ants, cockroaches, 

 crickets, sow-bugs, diplopods, centipedes, etc. By means of adhesive discs 

 upon the tips of their phalanges, frogs of this species are able to adhere to the 

 smoothest kinds of vegetation and even to glass. They would damage few 

 if any of the most delicate of plants as they leap to and fro among the foliage 

 and ordinarily they absolutely would not damage any part of a plant by di- 

 rectly feeding upon its tissues." 



ENEMIES 



In 19 1 2 this tree frog was found in the stomach contents of only one 

 species of snake, the black snake. One had taken four of them, head first 

 and the long slender legs were the only undigested remains. One of the four 

 is a ripe female and doubtless this individual with the other three were cap- 

 tured while bound for the breeding ponds or while in them. The wonder is 

 that this bright common morsel is not more frequently captured, for the pine 

 woods tree frog (H. femoralis) was taken by four different species of snakes. 



In 192 1 one of the Lee boys told me they caught "trout" {Micropterus 

 salmoides) with Hyla cinerea as bait. Doubtless on the prairies and along the 

 water courses when the Hyla cinerea descend to the waterlily level largemouth 

 bass and other fish feed on them as do water snakes and ribbon snakes. 



On May 11, 1921, along the edge of Billy's Lake we thought that we ob- 

 served gnats, mosquitoes, etc., and other Diptera all over these frogs. All 

 the specimens we collected (however) according to the Cornell Department of 

 Entomology are of one kind, a harmless species (Oscinis longipes). These 

 frogs are convenient resting places, like the immediate vegetation in which 

 these flies were equally abundant. No doubt harmful Diptera prey on the frogs. 



One of the reputable lumber foreman told us about the following episode 

 which with variations has been told of more than one species of Bufo. While 

 smoking he was seated on a log in the cypress bay. After a time he flipped 

 his cigarette and the lighted stub landed near a green tree frog. It seized 

 the stub in its mouth and went through interesting antics to eject it. 



AUTUMNAL DISAPPEARANCE 

 From none of the Cornell Expeditions of December and January have we 

 received this species. Our latest residence in the swamp has been in August 



