ART. 11 NORTH AMERICAN TADPOLES — WRIGHT 53 



not extend under second row to the end of the third row of labial 

 teeth as in H. crucifer. The second row of papillae across the lower 

 labial border is about equal to the second row of labial teeth. The 

 third labial row of teeth is short, one-fourth to one-third the length 

 of the first or second row of lower labial teeth. The first and second 

 rows about equal and about two times the horny beak in length, 

 upper fringe somewhat angulate in the middle. 



Measurements. — Length of body (7.8-9.0 mm.) in tail (12-14.4 mm.) 

 1.33-2.0, average 1.58. Width (4.0-5.8 mm.) of body in its own 

 length 1.3-2.1, average 1.65. Depth (3.8-5.0 mm.) of body 1.0-1.4 

 in body width, average 1.17. Depth of body 1.72-2.2 in length of 

 body, average 1.90. Depth (3.2-4.0 mm.) of tail in length of tail 

 3.1-4.4, average 3.55. Muscular part (2.0-2.2 mm.) 1.7-2.2 in depth 

 of tail, average 1.88. Spiracle 1.7-2.1 nearer base of hind legs or 

 vent region (2.8-3.8 mm.) than the tip of the snout (4.8-6.8 mm.), 

 average 1.875. Spiracle to eye (3.0-3.4 mm.) equals spiracle to base 

 of hind legs or vent. Eye to tip of snout (2.6-3.8 mm.) about equal 

 to eye to spiracle. Nostril 1.25-2.0 nearer eye (1.2-1.6 mm.) than 

 snout (2.0-2.4 mm.), average 1.5. Mouth (2.0-2.8 mm.) usually 

 equals internasal space (2.0-2.8 mm.). Mouth contained 1.5-1.9 

 (average 1.66) in interorbital distance (3.0-4.2 mm.). Internasal 

 space contained in interorbital space 1.3-2.1, average 1.63. 



The dimensions of the largest tadpole are: 



Mm. 



Spiracle to vent 3. 8 



Spiracle to eye 3. 



Eye to snout 3. 



Eye to nostril 1.2 



Nostril to snout 2. 2 



Mouth 2. 2 



Mm. 



Totallength 23. 



Body length 8. 8 



Body depth 5. 



Body width... 5. 2 



Tail length 14. 2 



Tail depth 3. 2 



Musculature of tail 2. 



Spiracle to snout 6. 8 



Interorbital distance 3. 4 



Internasal distance 2. 2 



HYLA CRUCIFER Wied 



Plate 9, figure 3 



Color description from life (not Ridgway). — The background of the 

 back is orange, heavily pigmented with dark (almost black) spots, 

 the general tone being greenish; these dark spots are interspersed 

 with very small shining goldlike ones. The venter is with a cream 

 ground, pigmented with dark toward the sides and more decidedly 

 from the gill region forward. The latter region is conspicuously 

 marked with gold and silver. The whole is iridescent. The muscular 

 part of the tail has an orange background at the base, becoming 

 lighter and almost clean at the tip, the whole pigmented with small 

 spots slightly coalesced. The crests are clear, heavily pigmented with 

 purplish black blotches on the outer edge, particularly toward the 



