4BT. 11 NORTH AMERICAN TADPOLES — WRIGHT 9 



&*. Spiracle nearer vent than snout 1.07-1.45, averages 1.23-1.3; mouth 1.0-1.37 

 in interorbital distance, average 1.12. 



IK Teeth % or Vs; no inner papillae or few inner papillae from end of the upper 

 fringe to the end of lower labial row; no row of finer papillae below third 

 lower row of teeth; spiracle nearer eye than vent 1.1-1.75, average 1.43; 

 nostril nearer eye than snout, 1.1-1.9, average 1.5; tadpoles (our material 

 42 mm.) medium; width of body in body length 1.6-2.0, average 1,77; 

 second upper row % to >i of the upper fringe; belly pure white or pale 

 cinnamon pink; tail musculature with black clusters outlining cartridge 

 buff areas; upper tail crest sometimes reticulated with black dots. Lower 

 crest except for caudal half free of spots. Eggs unknown. Transforma- 

 tion size unknown. 

 Utah and Nevada. (PI. 5, fig. 2.) Rana onca. 



i*. Teeth | or i; four to six rows of inner papillae from end of upper fringe to 

 end of lower labial row; a row of heavy inner papillae below the third lower 

 row of teeth; spiracle nearer eye than vent 1.42-182, average 1.62; nostril 

 nearer eye than snout; 1.0-1.42, average 1.2; width of body in body 

 length 1.45-1.86, average 1.6; tadpoles large (92 mm.); second upper 

 row fV or TT of the upper fringe or second upper row absent; belly pale 

 chalcedony j'ellow, sulpher yellow, vinaceous, pale grayish vinaceous or 

 vinaceous buff; tail: upper tail crest with a black line or row of large black 

 spots, more prominent than in R. grylio; middle of musculature ivith another 

 black line, tail dark with pale chalcedony yellow spots. Transformation size 

 25-35 mm. 

 Eggs a submerged mass. 

 New Jersey-Okefinokee Swamp, Georgia. (PL 5, fig. l.)_. Rana virgatipes. 



d'K Papillary border on side of labium without an emargination; tadpoles 23-50 

 mm. length; labial teeth f or f (Hylidae.) 



eK Labial teeth |; eye dorsal just inside the lateral outline in dorsal aspect 

 (more like Ranids) ; eye 1.0-1.66 (av. 1.22), nearer tip of snout than 

 spiracle; depth of tail in length of tail 3.25-5.0, average 4.0; suborbital 

 region oblique not vertical; spiracle to eye usually equal distance from 

 spiracle to vent or base of hind legs; spiracle plainly showing from dorsum; 

 spiracular tube in life stands out at an angle from the body and operiing is 

 apart from the body proper; tail tip conspicuously black (at times lost) ; 

 papillary border does not extend above the end of the upper fringe (like 

 Rana); length of horny beak in upper fringe of teeth 1.2-1.35 times; 

 eggs single, rarely a mass. 

 New York-Florida-Texas, up Mississippi Valley to Canadian Northwest. 

 (PI. 1, fig. 10) Acris. 



e'. Labial teeth usually | (rarely f ) ; eye lateral, visible from ventral as well as 

 the dorsal aspect; eye 1.0-1.75 nearer the spiracle than tip of snout; 

 depth of tail in length of tail 1.6-4.4, average 2.1-3.55; suborbital region 

 vertical; spiracular tube in life parallel with body and opening at inner 

 edge closely connected with or near to body proper. 



Hylidae exclusive of Acris. 



p. Labial teeth |. 



(/'. Teeth normally f; tadpole to 23 mm.; spiracle 1.4-1.9 nearer base of hind 

 legs or vent than tip of snout, average 1.42; nostril to eye 1.37-2.0 in 

 nostril to snout, average 1.6; tail crests very clear with fine elongate 

 fleckings; tail musculature with black brown lateral band with light area 

 below; single row of papillae on lower labial border below second lower 

 row of teeth; upper fringe somewhat angulate in middle (like H. femoralis) ; 



