136 REPTILES AND BATRACHTANS 



portion of the abdomen ; there is a light band from one 

 supraciliary to the other, bending back in the middle; a 

 double series of small spots of brown extends along the 

 middle of the back from the occiput : crown flat, without 

 indications of ridges or concavity ; paratoids rounded, a 

 series of prominent warts is continued back from the lower 

 margin of the gland. Those from San Antonio are much 

 darker, above and below. 



Bufo cognatus Say, 1823. 



San Luis Potosi ; nine leagues south of San Luis Potosi ; 

 mountains of Alvarez. 



The spots are smaller than on those from Kansas. The 

 frontal ridges approach each other closely between the an- 

 terior ends of the orbits ; from this point to the end of the 

 snout the ridges are parallel with a very narrow groove 

 between them. On B. lentiginoms and B. americanus 

 this rostral groove widens toward the frontal region. 



Bufo speciosus Girard, 1854. 



San Pedro, Mexico. 



Heretofore this toad has been placed in B. comjpactilis, 

 a warrant for which we do not find in comparison of adult 

 examples. While in small- to medium-sized the bony ridges 

 of the crown are indistinct or low, on large ones they be- 

 come moderately prominent. On both young and old the 

 interorbital space is concave, and between the forward ex- 

 tremities of the upper eyelid there is a pair of prominences, 

 more or less coalescing to form a transverse ridge. The 

 supraorbital ridge meets the postorbital at a very open an- 

 gle, and from the junction a short parietal ridge passes 

 backward (as figured in pi. 40, tig. 7, Mex. Bound. Surv.). 

 In the average the spots are larger than those of B. com- 



