396 CLASS REPTILIA. 



form a genus of them under the name of Dacty- 



LETHRA.* 



Hyla, Laurenti, Calamita, Schn. et Merrem, 



Do not differ from the frogs, but because the extre- 

 mity of their toes is widened and rounded into a 

 sort of viscous ball, which allows them to fix to 

 bodies and climb on trees. They remain there in 

 fact all the summer, and pursue insects ; but they 

 lay their eggs in the water, and bury themselves in 

 the mud in winter like the other frogs. The male 

 has a pouch under the throat, which swells when 

 he cries. 



The Tree Frog, (Rana Arhorea, L. Roes. Ran. pi- 

 ix. X. xi.) 



Green above, pale underneath, a yellow and black 

 line along each side of the body. It does not re- 

 produce until four years of age and couples at the 

 end of April. Its tadpole completes its metamor- 

 phosis in the month of August. 



The foreign hylae are tolerably numerous. There 

 are many of them rather pretty. One of the 

 largest and handsomest is, 



'&' 



* From ^aXTi/X.',Sfre (thimble). Their claws have this form. The Cra- 

 paud Lisse of Daudin, pi. xxx. f. 1, is a bad figure of it, in which the hind 

 feet are altogether wanting. Merrem has made of it his Pipa Lavis. The 

 Pipa Bvfoyiia of Merr., or pretended male Pipa, pi. enl. No. 21, f. 2, is 

 again the same species represented without claws. M. Fitzinger has made 

 of these species of Merrem, Engystoma, but the true engystoma, or bre- 

 vioeps, Merr., have no teeth or claws. 



