342 PROCEEDINGS OP THE ACADEMY OF 



Hyperolius concolor. 



Ixalus concolor Hallow., Pr. A. N. S. Philada., 1857, p. 72. 



Heal of medium size, as long as broad ; muzzle not projecting, canthus ros- 

 tralis straight, loreal region not concave. Tympanum concealed. Tongue 

 large, broadly obpyriform, deeply emarginate. Fingers scarcely palmate, 

 two terminal phalanges of fourth toe free. No tubercles or folds on the upper 

 surfaces. Length of head and body 1 inch 6 lines ; of hinder extremity 

 2 inches. Above dark brown ; the brachium and femur similar to the back. 

 No spots or bands. Below brownish white. 



This species does not appear to have been described by Dr. Hallowell. 

 Western Africa is its native country. 



Hyperolius cinctiventris Cope. 



Head quite broad ; muzzle truncate ; canthus rostralis concave. Frontal 

 region broad, convex ; eyes not very prominent. Tympanum concealed ; 

 tongue elongate broad and extensively notched posteriorly. Fingers one- 

 fourth, toes half webbed. All the inferior surfaces except the gular, granu- 

 late, the median abdominal most coarsely. A strong postgular fold ; another 

 surrounds the median abdominal region, including an acute angle at the 

 pubic region. A temporo-crural fold. Skin of upper surfaces with distant 

 small tubercles. Length of head and body nine lines. Light yellowish brown 

 above ; a narrow brown line through the eye. Entire femur and under sur- 

 faces of extremities, also the annular space between the abdomen and the 

 lateral and gular folds, black. 



Hyperolius spinifrons Cope. 



Tympanum concealed; head not broad, muzzle rounded ; canthus rostralis 

 rounded, swollen; nostrils anterior; profile continuous to lip. Tongue ellip- 

 tic, deeply nicked ; inner nares widely separated. Skin of upper surfaces 

 smooth, except upon the front and muzzle, where it is studded with acute 

 tubercles as in the cyprinid genera Ceratichthys, etc. Digits slightly palmate. 

 Appressed femur scarcely exceeding elbow. Length of head and body one 

 inch. Beneath brownish yellow ; above yellowish brown, with a dark brown 

 lateral band between the eye and groin, which is pale bordered anteriorly ; 

 also a median band which commences between the eyes, and becomes wider 

 and more indistinct posteriorly. Extremities brown, immaculate ; femur not 

 paler than tibia ; brachium yellow all round at axilla. 



Hyperolius sugillatus Cope. 



Tympanum concealed. Head very broad, eyelids not much developed ; 

 outlines of muzzle convergent, truncate ; profile of its extremity vertical. 

 Tongue rounded, broadly emarginate ; ostia pharyngea well developed. Bra- 

 chium very short ; fingers slightly, toes three-fifths, webbed. Hinder extre- 

 mities long ; appressed femur reaching much beyond elbow. Skin above 

 weakly corrugated. Length of head and body one inch. Belly yellow ; 

 above straw color, a yellow band extending from end of muzzle to sacral re- 

 gion ; it is bounded beneath on the muzzle by a purple line ; there is also 

 a purple spot upon each eyelid, (whence the name.) 



The four species of Hyperolius here described as new, and the Crumenifera 

 p u s i 1 1 a, formed part of the very valuable collection made by Mr. Grout at 

 Umvoti. 



Hyperolius coccotis Cope. 



Muzzle prominent, subacute, canthus rostralis nearly straight. Frontal 

 space more than twice the breadth of a palpebra. Tongue as broad as long, 

 roundly emarginate. Ostia pharyngea smaller than posterior nares ; tympa- 

 num concealed. Skin of the upper surfaces smooth. A supra-axillary fold. 

 Coarse granulations posterior to orbit and round canthus of mouth ; abdomen 



[August, 



