f 



THE BATRACIIIA OP NORTH AMERICA. 2f)l 



Adenomas Cope, Proc. Ac. Phila., 1860, p. 371. 



liha-ho Cope, eod. loc, 1S62, p. 357, and Nat. Hist. Rev., 18G5, p. 102. 



Jitdoniu Stoliczka, Proc. As. Soc., 1870, j). 152. 



BromopUcirus Camerano, Atti. Ace. Tor., xiv, 1879, p. 882. 



Vupil horizontal. Tongue elliptic or pyriform, entire and free behind. 

 Vomerine teeth none. Tymijanum distinct or hidden. Fingers free; 

 toes more or less webbed, the tips simple or dilated into small disks. 

 Oater metatarsals united. Omosternum generally missing; if present, 

 cartilaginous; sternum, a cartilaginous plate, sometimes more or less 

 ossified along the median line. Diapophyses of sacral vertebra more 

 or less dilated. Terminal phalanges obtuse or triangular. 



In the Proceedings of the Philadelphia Academy for 1854 Dr. Charles 

 Girard gave a synopsis of the North American species of this genus, 

 which embraces thirteen specific names. Eight of these are recognized 

 in the present work, and two others as subspecies. In 1886 the writer 

 gave a synopsis of the species in the Proceedings of the American 

 Philosophical Society, the result of the study of which Las been incor- 

 porated into the present volume. 



I. Head without bony crests above. 



a. luterorbital space wider than eyelid. 



Parotoi'd glands small, as wide as long, not wider than head ; legs longer, 

 end of tarsus reaching to from front of orbit to end of ninzzle ; meta- 

 tarsal tubercles insignificant B. punctatus. 



Parotoid glands large, long, spreading posteriorly, much wider than head ; 

 legs short, end of tarsus to tympanum; metatarsal tubercles insig- 

 nificant B. debilis. 



aa. luterorbital space narrower than eyelid. 



Parotoid gland oval ; metatarsal tubercles insignificant; a large gland 



on tibia ; size larger B. columbiensis. 



Parotoid gland oval ; both metatarsal tubercles with cutting edges, the 

 internal very large; muzzle very short; no large gland on tibia; 



size smaller __ B. compaciilis. 



II. Head with bony crests above. 



1. luterorbital space wider than eyelid. 



A strong postfrontal crest ; superciliaries divergent backwards ; parotoid 

 gland narrow and elongate, descending towards axiUa ; large glands 

 on thigh and on tibia ; head four times in the length ; metatarsal tub- 

 ercles small B. alvarins. 



2. luterorbital space narrower than eyelid. 

 a. No postorbital ridges. 



Superciliary crests parallel ; tympanum distinct ; two cutting metatarsal 



tubercles ; femur largely free B. hem \opli rijs. 



aa. Postorbital ridges present. 



Two large cutting metatarsal processes; superciliary crests very diver- 

 gent and distinct posteriorly, confounded in a nasal boss anteriorly ; 

 spots very large ■ B. cognafits. 



One smaller metatarsal crest; superciliary crests not incurved and trans- 

 verse posteriorly; parotoid glands narrow, uot descending behind 

 tympanum ; large B. lentiginosus. 



One smaller metatarsal tubercle; superciliary crests incurved posteriorly 

 so as to be transverse; a supratympanic crest; parotoid gland de- 

 scending on sides to inferior x^art of tympanum B. quercicus^ 



