List of Half-Tones 

 PLATE FACING PAGE 



LI 1 1 Figs. 165-169. Hyla regilla Baird and Girard: 

 the skin; eggs laid in clusters; vocal pouch and 

 other structural characteristics . . . 138 



LIV "Most of the SPRING PEEPERS live on the ground 

 in the woods throughout the year except for 

 a few weeks in early spring, when they are 

 to be found in the ponds and the marshes 



adjacent." 139 



LV Figs. 170-172. Habits of Hyla pickeringii Storer, 148 



LVI Figs. 173-177. Studies of The SOUTHERN TREE 

 FROG (Hyla squirella Bosc) : a delicate, smooth- 

 skinned little tree frog, one of the most active 



in North America 149 



LVII Figs. 178-183. Smilisca baudinii: changes from 

 nearly black to delicate light green or fawn 

 colour; fingers with slight webs; structure study 



of under parts 152 



LVI 1 1 Fig. 184. Studies of the CRICKET FROG (Acris 

 gryllus Le Conte). Fig. 185. Studies of the 

 SWAMP TREE FROG (Cboropbilus n. feriarum 

 Baird) 153 



LIX Figs. 186-187. LitbodyteslatransCope. Fig. 1 88. 

 Liibodytes latrans: characteristics of under 



surface 164 



LX Figs. 189-192. Engystoma carolinense Holbrook. 



Fig. 193. Engystoma texense Girard . .165 



LXI Figs. 194-196. Hypopacbus cuneus Cope: fat 

 squat body; fold of skin on the top of head 

 back of eyes; structure of hand and foot; ver- 

 tebral streak; arrangement of spots and bands 

 of black on upper surface . . . .170 

 LXII "The LEOPARD FROG lives in meadows and fields 



adjacent to brooks and marshes" . . .171 

 LXI 1 1 Figs. 197-199. LEOPARD FROGS (Rana pipiens 

 Shreber): structure study of hand and foot; 

 typical young LEOPARD FROGS . . . . 1 76 

 LXIV Figs. 200-201. Characteristics of the COMMON 



LEOPARD FROG (Rana pipiens Shreber) . . 177 



LXV Development of the LEOPARD FROG'S EGG . .178 



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