164 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



dark bluish plumbeous and purplish, respectively, indicates that the 

 general color of the upperparts in both species "in life is some shade 

 of green. There are, however, some differences in the general body 

 build of these tree frogs that are very difficult to describe. 



The structual features that appear to distinguish them are as follows: 

 In Hyla taeniopus, the vomerine teeth are in small clusters between 

 the choanae ; transverse diameter of tympanum about one-half that 

 of the eye; a tarsal fold extends from inner metatarsal tubercle to 

 tibio-tarsal joint; tip of first finger reaches to apical disk of second; 

 fingers one-fourth webbed; upper surface of hind Umb with dark 

 crossbars. The type of H. bistinda differs from the cotypes of H. 

 taeniopus in having the vomerine teeth in two slightly oblique rows at 

 level of posterior margins of choanae; transverse diameter of tym- 

 panum one-third that of the eye; tarsal fold indistinct; first finger 

 considerably shorter than second; fingers wdth vestigial web at base; 

 upper surface of hind Umb without any trace of dark crossbars. 



Specimens examined. — One, the type. 



HYLA EXIAHA Baird 



1854. Hyla eximia Baird, Proc. Acad. Nat. Sci. Philadelphia, vol. 7, p. 61, Apr. — 

 Baird, 1859, Report on the United States and Mexican Boundary Survey, vol. 

 2, Reptiles, p. 29, pi. 38, figs. 8-10. — Brocchi, 1882, Mission scientifique au 

 Mexique et dans rAm<5rique Centrale, recherches zoologiques, pt. 3, sect. 2, 

 pp. 32, 33, pi. 1, fig. 2; pi. 13, figs. 4, 4a. 



1858. Hyla euphorbiacea GtiNXHER, Catalogue of the Batrachia Salientia in the 

 collection of the British Museum, p. 109, pi. 10, fig. C (Cordoba and Cordil- 

 leras, Mexico). 



1901. Hyla nana Gunther, Biologia Centrali-Americana, Reptilia and Batrachia, 

 pp. 263, 264, pi. 73, fig. A, June (Cuernavaca, State of Morelos, Mexico). 

 [Nee Hyla nana Boulenger, 1889, Ann. Mus. Civ. di Storia Nat. Genova, 

 ser. 2, vol. 7, p. 249, pi. 2, fig. 2 (Colonia Resistencia, South Chaco, Argen- 

 tine Republic).] 



1902. H[yla] smithii Boulenger, Zool. Rec, vol. 38, Rept. and Batr., p. 33. 



Type locality. — City of Mexico, Federal District, Mexico. 



Range. — From Durango southward through Guanajuato, Hidalgo, 

 and Puebla to Vera Cruz (Cordoba), and on the west coast south- 

 ward through Nayarit to Michoacan and Oaxaca. 



Remarks. — The two cotypes of Hyla eximia (U.S.N.M. No. 3248) 

 were collected by Maj. William Rich, in the vicinity of the City of 

 Mexico, Federal District. Both of these cotypes are young individ- 

 uals and measure 19.2 and 19.5 mm. in length, respectively. The 

 original coloration of these specimens has disappeared, and the bodies 

 are soft and nearly transparent. The bodily proportions and struc- 

 tural features agree with young individuals of the tree frog currently 

 recognized as Hyla eximia. The original drawing of the adult tree 

 frog figured by Baird in 1859 does not have any notation as to the 

 catalogue number or locality. This specimen has not been recognized 



