NATURAL SCIENCES OF PHILADELPHIA. 



Anura. 



501 



Spea hammondii Baird, Pac. R. R. Rept. Williamson's Exped. 1857, 12. 

 Cope, Journ. Acad. Nat. Sci. 1866, 81. 

 Two specimens. 



Hyla arenicolor Cope, Jonrn. Acad. Nat. Sci. Philada. 1866, p. 84. 



H. affinis Baird, U. S. Mex. Bound. Surv. Tab., not of Spix. 



Two specimens. 732, "sides of abdomen and inside of thighs brightyellow 

 in life.'' Coues. 



Bufo frontosus sp. nov. 



A species most allied to the B. americanus, but differing in the shorter 

 and more elevated cranium, longer and larger hind limbs, and more acumi- 

 nate parotoid glands. 



The canthus rostrales not marked, the muzzle descending very steeply from 

 the anterior angles of the orbits, shorter than the elevated perpendicular 

 muzzle. Fiontal ridges higher than eyelids, rising steeply behind, termina- 

 ting in two short convergent tuberosities, divergent, with interior creuations 

 behind ; postocular ridge equally developed, sending a very small process to 

 the anterior acuminate extremity of the parotoids. Elevation of cranium at 

 parietal tubercle equal to length of same from the same point. Eye large ; 

 tympanum distinct, half eye; parotoid narrow, long, acuminate at both ends. 

 Elbow to anterior margin of orbit ; heel to end of muzzle. Skin everywhere 

 with numerous small tubercles; soles rough ; toes half webbed. 



Brown above, with pale vertebral line, and three pairs of deep brown me- 

 dium sized spots, with paler centres. Sides and lips with small brown spots. 

 Femur and tibia with one indistinct brown cross-bar each. Below uniform 

 yellow. 



Total length four inches, of which the head is 9 lines to postocular ridges ; 

 breadth between orbits 2-5 lines ; hind limb 5 inches; sacrum 1 inch across. 

 One specimen. 



Bufo microscaphus sp. nov. 



Head broader than long, obtuse, muzzle descending in full arc to labial 

 border from line of orbit; superciliary ridges well marked, but concealed by 

 the thick skin, plane, parallel; postorbital not prominent; vertical gutter 

 narrow. Eyes large, prominent, double tympanum. Parotoids broad, smooth. 

 Skin little roughened. Toes two-thirds webbed ; shovel very small, fre- 

 quently not black-edged, outer tubercle small, heel to end muzzle. 



Above blackish, a black spot on each parotoid, and dark light centred bar 

 on femur and tibia ; a yellowish bar across front and palpebral, and spot on 

 nape ; muzzle dark. 



Total length 1 in. 5-5 1. ; to postorbital ridge 7-5 1. ; fore limb 1 in. 9 1. ; 

 hind limb 3 in. 2 1. ; femur J included. 



The oval, well separated parotoids and general appearance of this species 

 ally it to the B. s p e c i o s u s Girard, but in that animal the supraorbital 

 ridges are obsolete, and the metatarsal shovel is very much stronger. The 

 B. dorsalis Hallow. (B. woodhvusei Gird.) is also allied, but is in all pro- 

 portions and details more elongate, and has a stronger shovel and head 

 ridges ; it always has the dorsal band, which never exists in the microsca- 

 phus, and never the transverse face-band of the latter. 



Numerous specimens in Dr. Coues' collection, ajso two previously in Mu3. 

 Smithsonian (4106, 4184), from the upper Colorado region, procured by H. 

 B. Mollhausen. 



Rana h a 1 e c i n a Bosc. 

 Near Fort Wingate ; Zuni City. 



1866.] 



