76 BULLETIN 58, UNITED STATES NATIONAL MUSEUM. 



1814. Hylaria Rafinesqtie, Specchio Sci. (Palermo), II, fasc. 7 (substitute for 

 Ilyla). 



1825. Boana Gray, Ann. Philos. (n. s.), X, p. 214 (type, Rana boans). 



1826. Calamita Fitzinger, Neue Classif. Rept., p. 38 (type, Rana caervlca White). 



1827. Rhacophorus "Kuhl" Schlegel, Isis, 1827, p. 294 (tyj^e, //. pabnata; not of 



Tschudi, 1838). 



1830. Calamites Wagler, »Syst. Amph., p. 200 (emendation of Fitzinger's Cala- 

 vvila). 



1830. Aulctris Wagler, Syst. Auipli., p. 201 (type, II. boans). 



1830. Hyas Wagler, Syst. Amph., p. 201 (type, II. arborea; not of Leach, 1815). 



1830. Scinar Wagler, Syst. Amph., p. 201 (type, II. aurata). 



1830. Dendrohyas Wagler, Syst. Amph., p. 342 (substitute name for Ilyas, pre- 

 occupied). 



1843. Lobipes Fitzinger, Syst. Rept., p. 80 (type, II. palmaia). 



1843. Dryophytes Fitzincjer, Syst. Rept., p. 31 (type, //. versicolor). 



1885. Epedaphus Cope, Proc. Amer. Philos. Soe., 1885, p. 383 (type, //. gratiosa). 



1899. Ilyliola Mocquard, Nouv. Arch. Mus. Paris (4), I, p. 337 (type, II. rcgilla). 



Tlie list of synonyms is considerably larger than the above, which 

 includes mostly such names only as are based upon species occurring 

 within the faunal area here treated of, or constitute corrections or 

 additions to the synonymy as commonly given. 



The tropical genus Hyla, as now understood, is American and Aus- 

 tralian in its distribution, and embraces consideral^ly over 200 species, 

 less than 3 per cent of which occur in the Old World. The species, 

 or forms, which are found in the mainland of Eurasia, viz, //. annec- 

 tens and H. simplex, with the ones treated of in this work, constitute a 

 closely related group °- extending from Great Britain to Japan, south 

 to northeastern India and Annam. 



The forms which are to occupy us in this connection may be distin- 

 guished as follows: 



KEY TO THE JAPANESE, KOREAN, AND FORMOSAN SPECIES OF HYLA. 



o' No deep l)lack spots on sides or legs. 



fe' Digital disks equaling inner metatarsal tubercle, 

 c' A distinct l)lackish stripe between nostril and eye. 



//. arborea japonica, p. 70 



c- No blackish stripe between nostril and eye II. arborea immacnlata, p. 82 



b~ Digital disks much smaller than inner metatarsal tul)erck' //. stepheni, p. 84 



a^ Sides of body and posterior aspect of hind limbs with deep Idack spots. 



//. chinensis, p. 8(5 

 HYLA ARBOREA ?' JAPONICA c Guenther. 



Plate IX, figs. 1-3. 



1838. Ilyla arborea Schlegel, Fauna Jap. Rept., pp. 112, 136, 139; Saur. etBatr., 

 pi. Ill, figs. 5d, 6 (not of liinnseus) (Japan). — Hilgendorf, Sitz. Ber. Ber- 

 lin Ges. Naturf. Fr., 1880, no. 8, p. 120 (Hondo; Yezo).— Fritze, Mitth. 

 Deutsch. Ges. Ost-Asiens, V, 1891, p. 239 (Yezo). 



a In turn related to Hyla eximia of Mexico. 



t Signifying arbor(>al. — Rana arborea Linn.eus, Syst. Nat., 10 ed., I, 1758, p. 213. 



I Signifying Japanese. 



d Reproduced in this W(irk on Plate IX, fig. 3. 



