" 



i 



i 



' I 



~i 



37(5 lUJLLETlN -M, U.MTEO STATES NATIONAL, MUSEUM. 



tbat lie koi)t ii miinber of them in ii viviirium near ii window. Both 

 were lelt opi'ii duriiij;' part of tlie day, and the Hyla' wouhl leave the 

 Louse and e.stablisli tlieiiuselves on the trees in the orchard, where their 

 voices were heard throughout the evening. During the night they 

 woidd return to the house, and would appear in their usual place in the 

 vivariiun in the morning. 



Their eggs arc laid in small packets on blades of gra.ss, slender 

 sticks, etc., in shallow ponds and pools. The metamorphosis takes 

 place while yet small, the young exceeding only a little those of the 

 northern toad, riifi) Icntitiinosus amcricanus. Some of the larval stages 

 are represented on Plate 7tf, (igs. L*;5-<l. 



Th(^ Jlyhi versicolor was named as an expression of its striking power 

 of metachrosis. It readily takes the color of the object on which it rests, 

 thus concealing itself successfully. Its colors vary from a deep brown 

 to gray, and nearly white to bright green. The change of color is not 

 rapidly accomplished. The favorite color is gray, which is identical 

 with that of the lichens of the trees which it irdiabits. Professor Ver- 

 rill records this species as being found at Norway, Me., the most east 

 ern locality known to mc. 



Jlyla rcrsirolor Ja\ Conto, 

 KKSKUVK SERIES. 



V i 



T' 



