ART. 11 NORTH AMERICAN TADPOLES — WRIGHT 61 



in body width, average 1.12. Depth of body 1.5-2.0 in body length, 

 average 1.8. Depth of tail (7.5-9.0 mm.) in length of tail 1.5-3.21. 

 Muscular part of tail (3.0-3.6 mm.) 2.3-2.8 in depth of tail, average 

 2.56. Spiracle 1.05-1.4 nearer base of hind legs (5.8-9.0 mm.) than 

 snout (8-10.0 mm.), average 1.25. Spiracle 1.6-1.75 nearer eye (3.0- 

 4.6 mm.) than base of the hind legs or vent, average 1.65. Eye 1-1.4 

 nearer spiracle (3.0-4.6 mm.) than tip of snout (4.2-5.4), average 

 1.19. Nostril 1-1.7 nearer eye (2.0-2.2 mm.) than tip of snout (2.2- 

 3.8 mm.), average 1.4. Mouth (2.4-3.4 mm.) usually 1.06-1.2 larger 

 than internasal space (2.0-3.2 mm). Mouth contained 1.4-1.7 times 

 (average) in interorbital distance (4.0-5.4 mm). Internasal space 

 contained in interorbital space 1.5-2.0, average 1.72. 

 The dimensions of the largest tadpole are : 



Mm. 



Total length 46. 6 



Body length.. 16. 



Body depth 8. 



Body width 9. 2 



Tail length 30. 



Tail depth 9. 



Musculature of tail 3. 2 



Spiracle to snout 9. 6 



Mm. 



Spiracle to vent 9. 



Spiracle to eye 3. 



Eye to snout 4. 2 



Eye to nostril 2. 2 



Nostril to snout 3. 6 



Mouth 3. 



Interorbital distance 3. 



Internasal distance 4. 6 



HYLA FEMORAUS latreille 



Plate 9, figure 6 



Color description from life (July 8, July 26, 1921). — Upper parts 

 of body olivaceous black to dull greenish black. Throat on either 

 side below eye pomegranate purple. Belly on sides and across breast 

 light vinaceous purple; center of belly soHd sulphur-yellow. Chin 

 clear with very little or no black dots. In younger tadpoles general 

 color light yellowish olive or grayish olive. All over upper parts are 

 fine grayish vinaceous or light vinaceous fawn dots and on the muscu- 

 lar part of tail but not on the crests. These dots become larger on 

 dark upper eyelid and give a conspicuous arrangement. In half- 

 grown tadpoles a cream-colored ring under the eye and extending 

 backward on either side of back for a distance. In very young tad- 

 poles the ring is almost complete about eye, but not on the back. 

 This ring faintly present in mature tadpoles and extends backward 

 on to the base of the musculature of the tail. Under the eye it is 

 warm buff, on body bufl'y brown, cartridge buff, or tilleul buff. 



Tail. — Beginning at body there runs along musculature for one- 

 half or more of its length a white, cartridge buff or pale cinnamon 

 pink stripe, marked off by the dark brown or black ground color of the 

 upper half of the musculature and the lower half of the same part. 

 Upper and lower crests with prominent large spots, black in younger 

 specimens and clusters of mouse gray on mature tadpoles. The 



