KEYS TO FROGS AND TOADS 



on Inick; legs extremely long: body slender antl flat; a light line n<irni,ilK occurs 

 along jaw, passing backward and downward beyond insertion of arm; skin 

 smooth; size up lo 63 mm.; in moist woodlands along streams; known only from 

 McCurtain County. Green Tree Toad, Hyla cinerea cinerea (Schneider). 



17. Color also variable but most often gray or brown; a large irregular .splotch of dark 

 color on back often roughly approaching a ragged, broad X; no light line along 

 jaw; size up to 48 mm.; skin commonly rough. (Hyla versicolor ) 18 



18. "Dorsal surface is smooth; 'a number of subcircular golden spots in the brown 

 ground on rear of thighs; interspaces (on rear of femur) often reduced to small 

 circular spots.' "^"^ Habitat, deep valleys, southeastern Oklahoma. 



Smooth Tree Toad.^'* Hyla versicolor chrysoscelis (Cope). 



18. "Dorsal surface rough ;l"' 'Brown reticulation on yellow ground of posterior face 

 of the thighs; more fully mottled with yellow and brown even covering the whole 

 inner face of the tibia and the light interspaces more or less angular.' " Habitat, 

 woodlands and savannahs, eastern half of Oklahoma. 



Common Tree Toad, Hyla versicolor versicolor (Le Conte). 



19. Toe discs very small: light and dark alternating on rear of femur; light lines, some- 

 times interrupted with dark, along jaw; webbing on hind feet extensive but not 

 complete on 4th toe; anal warts present; a large triangular mark back of eyes. 

 Habitat, pond and stream sides except in deep woods. Probably state-wide and very 

 abundant. Northern Cricket Frog, Aa-is crepitans Baird. 



19. Toe discs small but not minute; triangular mark behind eyes and light line along 

 jaw often present but seldom on same individual; webbing slight 20 



20. Size larger (up to 42 mm.); body short, squat, toad-like; legs short; color gray or 

 brown with few large dark spots dorsally, one of which is triangular and be- 

 tween eyes; a black band through eye; common except in extreme east and west. 



Northern Ornate Chorus Frog, Psetidacris streckcri Wright and Wright. 



20. Size smaller (up to 35 mm., usually about 30-33); body long and slender; 

 legs long 21 



21. Light line along jaw present; back characteristically with three long dark stripes 

 which may be broken into a series of spots; triangular mark behind eye very 

 seldom present; common in eastern one-third, rare in western two-thirds of state. 



Striped Chorus Frog, Psetidacris triseriata (Wied). 



21. No light line along jaw; back characteristically with many spots which may partly 

 or (rarely) wholly run together to form lines; triangular mark behind eyes rarely 

 absent; grasslands in western two-thirds of state, going east to Tulsa and Wash- 

 ington counties in northeast. Spotted Chorus Frog,Pseudacris clarl^ii (Baird). 



22. Dorsal color nearly solid green, greenish brown or (rarely) nearly black. Back with 



no markings or a few small irregular dark markings only 23 



22. Dorsal surface definitely spotted 24 



23. Size larger (up to 200 mm.); dorsolateral folds short, bending around the tym- 

 panum; toes fully webbed. Habitat, edges oi deep water, (juveniles sometimes in 

 ditches); state-wide and abundant. Bullfrog, Rana catesheiana Shaw. 



23. Size medium (up to 100 mm., but usually smaller); dorsolateral folds long, ex- 

 tending to groin; toes not quite fully webbed. Marshes and muddy streams and 

 pond sides; eastern half of Oklahoma, common only in east. 



Green Frog, Rana clamitans Latreille. 



24. Spots on back squarish; size smaller (up to 80 mm.). Known in eastern Okla- 

 homa only, rare. Pickerel Frog, Rana paltistris Le Conte. 



24. Spots rounded (not squarish) 25 



13 From Wright and Wright (1942). 



^^ This vernacular name is here proposed for the first time, since when the list of sug- 

 gestions for such naming was published (Bragg, 1943), this subspecies was not included 

 because then not known from the state. 



15 Sometimes smooth in central Oklahoma. 



19 



