4 PROCEEDINGS OF THE NATIONAL MUSEUM voi. 74 



mid(Me; median inten^al of second lower row broad; last lower row of teeth 

 1.75-2.0 times in next to last row of teeth; second upper row usually broken 

 in middle. Egg mass, a loose cylinder, many eggs on stalks. 

 Montana-Texas and westward to Pacific Coast States. (PI. 1, fig. 3.) 



Scaphiopus hammondii. 



p. Tadpole small (24.5 mm.); teeth usually |, rarely -|, f, -f possible |; upper 

 fringe of papillae inconspicuously broken in middle by a row of teeth or not 

 so broken, and first row of teeth is absent; eye 1.0-1.6 nearer tip of snout 

 than to the spiracle, average 1.3; muscular part of tail 2.2-3.33 in depth of 

 tail, average 2.7; width of body in its own length 1.3-1.6, average 1.4; depth 

 of body 1.25-1.55 in body width, average 1.35; spiracle 1.5-2.2 nearer eye 

 than base of hind legs or vent, average 1.85; internasal space 1.45-2.3 in 

 interorbital space, average 2.0; third lower labial row continuous; median 

 interval of second lower row very narrow. Last lower row of 2.5-3.0 times 

 in next to lower row of teeth; second upper row not or barelj' broken in 

 middle; egg mass an irregular cylinder, at first bandlike. 

 Texas-California, Mexico. (PI. 1, fig. 2.) Scaphiopus couchii. 



d?. Labial teeth |; papillae confined to the sides of the labium (on lower half 

 only in Bujo vundatus) upper and lower edges toothed; papillary border 

 on each side emarginate; eyes slightly nearer lateral outline than mid 

 dorsal line, above lateral axis; spiracle small, a porelike opening; tadpoles 

 24-28 mm in length Bufonidae. 



e'. Papillae only on lower half of lateral margin; or a slight marginal row of 4 to 

 6 papillae on upper half; no inner papillae normally; third lower row of 

 teeth equal to the 1st row of lower labial teeth; median space between 

 lateral parts of the 2nd row of upper labial teeth 2-3 times in either lateral 

 row; horny beak 1.2-1.5 in third lower labial row; tadpoles to 25 mm 

 One of the blackest Bufo tadpoles; tail musculature evenly dotted with black; 

 venter with light grayish vinaceous spots; eggs single or film or scattered 

 mass on bottom, not in files. 

 Central Texas-California, Utah, Lower California. (PI. 5, fig. 5.) 



Bufo punctatus. 



e-. Papillae on upper and lower halves of lateral labial margin; some inner 

 papillae. 



/I. Bicolor tadpoles, light grayish olive, dark olive buff or clay color; the lightest 

 of our toad tadpoles; in life intestine does not show through the skin of the 

 belly (shows in spirits); third lower row of labial teeth short, 1.8-2.4 in 

 first lower row; third lower row 1.5-2.0 times in the horny beak; median 

 space between lateral parts of the 2nd row of upper labial teeth large, 1-2.0 

 times greater than either lateral part; depth of tail in length of tail 3.0-3.5; 

 horny beak 1.3-1.4 in first or second lower row of teeth; lower loop of 

 papillae to end of third lower row but not under it, usually not two rows; 

 tail musculature with dark vinaceous drab band to tail tip; below this a 

 pale vinaceous pink band; belly pale vinaceous pink; eggs in files or strings, 

 brown or buffy brown above, cream or straw yellow below; no inner tube. 

 Texas-Mexico, Arizona. (PL 5, fig. 6.) Bufo compactilis. 



p. Black or blackish tadpoles; in life intestine shows through the skin of the belly; 

 third lower row of labial teeth long, 1.2-1.6 in first lower row; third lower 

 row 1.0-1.5 in horny beak; median space between lateral parts of the 2nd 

 row of upper labial teeth small, contained 2.0-4.9 times in either lateral 

 half, not greater than lateral half. 



g'. Papillae very faint, minute, at times hard to see but present; third lower row 

 of labial teeth not equal to 1st lower row of teeth, but equal to or greater 

 than horny beak; horny beak in upper fringe 1.2-1.5 in upper fringe, 1.3-1.5 



