FROM TEXAS AND MEXICO. 135 



The specimens from this locality show a great deal of 

 individual variation ; it ranges from those in which a light 

 ground color is marked with numerous spots of brown to 

 those on which the ground is so dark brown the spots are 

 invisible. 



KANA BERLANDIERI Baird, 1858. 



Monclova, San Pedro, and Sail Luis Potosi, Mexico. 



But one of the lot has the foot webbed as -figured by 

 Baird, Mex. Bound., pi. 36, fig. 10. Commonly the mem- 

 branes do not extend nearly so far toward the end of the 

 longest toe. Whether the more complete web is a local 

 peculiarity can only be determined by more specimens. 



The Monclova representatives of this variety of R. vires- 

 cens Kami, 1761 (7?. halecina Schreb., 1782, in synon.), 

 are of an ashy color, with the central portions of the spots 

 much faded. 



.'fUici [j;fliI)IiJijiiloi ailUUiliJuu/ivUi <Wjl J3Vjji>'\ 1 .*& it-'i 



ENGYSTOMA CAROLINENSE Holbr., 1836. 



Corpus Christi, Mexico; Goliad, Goliad Co., Tex. 



These types have the single tarsal tubercle ; the snout 

 is moderately long ; the color is more uniform than in those 

 from Carolina ; the longitudinal bauds are absent, and there 

 are a few scattered spots of black on back and top of legs. 



Jl * V? 'J W '. - 1 I * * - ^ A J J f -3 i 7 



PALUDICOLA NITIDA Pet. ; Blgr. 



Sierra de San Miguelito, nine leagues south of San Luis 



Potosi 



5J fyj/sv/< < vh^nii q'[i:fla e snibfj'jJxo ri2i;ofii t ji. i. 

 BUFO VALLICEPS Wiegm., 1833. 



1 IIO fiO ,c.-i'-J'11ii\ ilOH:l-.>:/i 



Corpus Christi and Monclova, Mexico ; San Antonio, 

 Texas. 



Adults from Monclova are without the dark mottling 

 beneath. The young have an extensive patch of brownish 

 along the median line, from the throat to the posterior 



ESSEX INST. BULLETIN, VOL. XIX 11 



