ABT. 11 NORTH AMERICAN TADPOLES — WRIGHT 63 



4.0 mm.) than base of hind legs or vent (5.0-6.0 mm.), average 1.87. 

 Eye 1.0-1.75 nearer to spiracle (2.0-4.0 mm.) than to tip of snout 

 (3.2-4.5 mm.), average 1.25. Nostril 1.2-2.3 nearer eye (1.2-2.5 mm.) 

 than snout (2.0-3.0 mm.), average 1.85. Mouth (2.0-3.5 mm.) equal 

 to the internasal space (2.0-3.5 mm.). Mouth contained 1.4-2.0 

 (average 1.65) in interorbital distance (3.5-6.0 mm.). Internasal 

 space (2.0-3.5 mm.) contained in interorbital space 1.3-2.0, average 

 1.7. 

 The dimensions of the largest tadpole are : 



Mm. Mm. 



Total length 33.0 Spiracle to vent 6.0 



Body length 10.0 Spiracle to eye 4.0 



Body depth 5. Eye to snout 3. 2 



Body width 6. 5 Eye to nostril 1. 5 



Tail length 22.5 Nostril to snout 3.0 



Tail depth 7.5 Mouth 3.0 



Musculature of tail 3.5 Interorbital distance 5.0 



Spiracle to snout 8.0 Internasal distance 3.5 



B' HYLA ARENICOLOR Cope 



■ Plafe 9. figure 2 



Color description from life {July 11, 1925). — Upper parts of body 

 dark greenish olive, dark olive, or deep olive. Back dotted with fine 

 i light yellowish olive specks. Pectoral and branchial regions of 

 venter light vinaceous fawn. Belly a solid pale cinnamon pink, on 

 sides of belly light vinaceous fawn or light vinaceous cinnamon or 

 white. 



Tail. — Heavily blotched with black on outer or upper half of upper 

 crest and on outer or lower half of the caudal half of lower crest. 

 The area next to the musculature free of black. In some tadpoles 

 tail fins suffused with some "reddish" orange pink, coral pink, or 

 coral red, as in H. versicolor. Some spots of light vinaceous fawn on 

 the lower side of the musculature for the first inch or more. Also 

 some bright green yellow with it. Some black more or less in the 

 middle line of the musculature. Caudal half of tail musculature 

 i, with many large black spots. 



Iris dark greenish olive or dark olive heavily dotted with greenish 

 yellow specks above and below the pupil; a clear dark greenish olive 

 or black area behind and ahead of the pupil. Pupil rim with greenish 

 yellow ring. Pupil rim with small emargination below. 



General appearance. — Tadpole medium (50.0 mm.)? not so deep 

 bodied as H. versicolor. Tail long or very long, rather narrow for a 

 Hylid of H. versicolor group, quite attenuated, but tail tip rounded. 

 Dorsal and ventral crest each less deep than the musculature. Dorsal 

 crest reaching the vertical of spiracle or not reaching it. Spiracle 



