60 BI'LLETIN 58, UNITED STATES NATIONAL MUSEUM. 



The Japanese and North China forms and species may be distin- 

 guished as follows : " 



KKY TO THE SPECIES OF BUFG IN JAPAN, FORMOSA, KOUEA, AND SIBERIAN COAST 



PROVINCE. 



" ' Tup of head \yith()ut liony ridges. 



b ' Inner edge of tarsus rounded, tubercular, with no sharp cutaneous fold. 



f ' Web between toes extending only as far as first basal phalanx o. third toe and 

 one-half the first basal phalanx of fourth (fig. 48). 



d ' Diameter of tympanum al^out twice as large as its distance from 1 he eye 



Bufofonnosus, p. GO 



d- Diameter of tympanum about equals the distance from the eye 



Bnfo smithi, p. 64 

 c- Web between toes extends as far as end of the two liasal phalanges of third toe 

 and first basal phalanx of fourth. 



d^ Underside uniform pale, or with small l)lack spots 



B)tfo buff) asiaticus, p. 66 



d- Underside marked with large black blotches BkJo bufo japoniais, p. 69 



b - Iimer edge of tarsus with a sharp cutaneous fold Bufo raddei, p. 70 



« - Top of head with bony ridges Bi(fo melanostictus, p. 72 



BUFO FORMOSUS6 Boulenger. 



Plate VIII. 



1838. Bufo Titlgaris japoniais Schlegel, Fauna Jap., Rept., pp. 106, 139 (Japan; 



specimens in Leiden Mus.; part only); Sauri et Batr., pi. ii, fig. 6. 

 1876. Bufo vulgaris var. prsetextatus Martens, Preuss. Exped. Ost-Asien, I, p. 384 



(Yokohama) (not of Boie?). — Hilgenporf, Sitz. Ber. Ges. Naturf. Fr. 



Berlin, 1880, p. 120. 

 1879. Bufo japonicus Camerano, Atti Accad. Torino, XIV, Pt. 5, Apr., 1879, p. 



884 (Yokohama; Tokyo; Mus. Zool. Turin; Aimonin and Fontanesi, 



collectors). 

 1883. Bufo for mosiis Boulenger, Proc. Zool. Soc. London, 1883, p. 140, pi. xxiii.c 



(type-locality, Yokohama; types in British Museum; Challenger Exped. 



collect.)— Okada, Cat. Vert. Jap., 1891, p. 66.— Boettger, Kat. Batr. 



Mus. Senckenberg., 1892, p. 37 (Nikko; Nippon; Japan). 

 1900. Bufo prsetextatiis Camerano, Mem. Accad. Torino, (2) L, p. 113; author's 



separate, p. 33, pis. i-ii (not of Boie?). 



Bufo formosus is most easily distinguished from B. japonicus by its 

 longer fore limbs, longer and slenderer digits, and much shorter webs 

 between the toes. The alleged difference in the relative size of first 

 and second finger, does not hold in every instance, for I have two 

 specimens of luidoubtedly the same species, from Gensan, Korea, in 

 which the relation is reversed, but as a rule it may be said that in B. 

 formosus the first fmger is shorter than the second, while in B. japoni- 

 cus it is equal to or longer than the second. In B. formosus, more- 

 over, the interorbital space appears to be proportionally narrower. 



aBufo sachalinensis is not given a place in this key, as the characters utilized in the 

 latter are not indicated in the only description of this form thus far pul)lished. 

 b Signifying Handsome, 

 c Reproduced ill this work on Plate VOL 



