Tree Frogs. Hylidae: Acris. Pseudacris. Hyla 



v 



Fig. 4. 1. Tympanum (ear). 2. Tympanic fold. 3. Snout (muzzle). 

 4. Plaits on throat of male. 5. Pectoral fold across breast. 6. Tarsal 

 fold. 7. Small adhesive disks. 8. Large adhesive disks. 9. Prepollex. 

 10. Rear of casque (skin fastened to skull) outlines rear of head. 



A. 



AA. 



Alternating dark and light bands on rear of thigh; oblique 

 white stripe from eye to shoulder; vertical dark and light 

 bars on upper jaw; white margined triangle between eyes; 

 hind leg very long (.$$-.62 in L.); tibia very long (.5-1.7 

 in L.). Cricket frog. Acris gryllus. Plate XXVI. 



No alternation of dark and light bands on rear of thigh; 

 triangle between eyes if present not white margined; no 

 alternation of dark and light bars on upper jaw. 

 b. No dark, brown, black or plum-colored stripe in front 

 of or behind eye. 

 c. Head skin attached to skull; thumb rudiment ap- 

 parent; rear of femur reticulated; no light jaw 

 spot or dark bar between eyes; disks very large; 

 size large 2 3/5-5 1/5 inches (64-130 mm.). 



Giant tree frog. Hyla septentrionalis. Plate XLVII. 



cc. Head skin not grown to skull; no thumb rudi- 

 ment; rear of femur unspotted. 

 d. Rear of thigh purple; no interorbital bar be- 

 tween eyes; throat with green on either side. 

 e. Green of female's throat not edged with 

 white; back smooth green; body slender 

 (head's width 3 to 3.6 times in length). 

 f. Yellow or white line along side and on 

 upper jaw; tibia 1. 7-1. 95 times in 

 length of body; 3rd finger longer 

 (3.3-4 in L.). 

 Green tree frog. Hyla cinerea cinerea. Plate XL. 



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