88 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



Specimens examined. — Twenty-four, as follows : 

 Lcptodactylus albilabris 



Type of Cystignatlius fragilis. 



2 Cotypes of Cystignathus labialis. 



LEPTODACTYLUS MELANONOTUS (Hallowell) 



1860. Cystignathus melanonotus Hallowell, Proc. Acad. Nat. Sci. Philadelphia^ 



vol. 12, p. 485, Oct. 

 1879. Cystignathus microtis Cope, Proc. Amer. Philos. Soc, vol. 18, no. 104, p. 



265, June 20 (Guanajuato, Mexico). 

 1879. Cystignathus perlaevis Cope, Proc. Amer. Philos. Soc, vol. 18, no. 104, p. 



269, June 20 (Japana, western Tehuantepee, Mexico). 

 1900. Leptodactylus caliginosus GtJNTHER, Biologia Centrali-Americana, Rep- 



tilia and Batrachia, p. 214, Apr. [Nee Leptodactylus caliginosus Girard^ 



1853.]— Ruthven, 1912, Zool. Jahrb. (Syst. Abt.), vol. 32, pt. 4, p. 306. 



Type locality. — Nicaragua. 



Range. — From Mazatlan in Sinaloa eastward to Orizaba in Vera 

 Cruz and southward through Colima, Guanajuato, Jalisco, and Oax- 

 aca to Guatemala, Nicaragua, and Costa Rica. 



Remarks.- — The type of Leptodactylus melanonotus (U.S.N.M. No. 

 6264) was collected by C. Wright, a member of the North Pacific 

 Exploring Expedition under Capt. John Rogers. This specimen has 

 not been located in the collection of the division of reptiles and 

 batrachians. Notwithstanding Cope's statement to the contrary,, 

 the type of Cystignathus microtis (U.S.N.M. No. 9906) has dermal 

 fringes on the toes, and this modification is especially well marked 

 on the basal portion of the fourth toe. The type as well as the other 

 specimens referred by Cope to tliis species are unquestionably the 

 young of L. melanonotus. These have a rather small tympanum and 

 the mottling of the underparts is less evident than in adults. Adults 

 of this species have a short white line below and adjacent to the eye. 

 Leptodactylus rnelanonotus is not a synonym of Leptodactylus calig- 

 inosus, as stated by Gunther, for the type of the latter (U.S.N.M. No. 

 7389) has a somewhat different coloration, wider rows of vomerine 

 teeth, and longer head. 



