46 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



angles of the mouth. It is an adult and is fairly well preserved. The 

 second cotype (U.S.N.M. No. 2608) was obtained in the vicinity of 

 Ringgold Barracks [Rio Grande City, Starr County], Tex., by Arthur 

 Schott, a surveyor attached to the United States and Mexican Bound- 

 ary Commission under Maj. W. H. Emory. This is an adult female 

 and may have been dissected by Cope. There is an incision on the 

 abdominal wall, another across the right parotoid gland, and a third 

 along the under surface of the humerus. At some time the preserva- 

 tive in which this cotype was kept may have been allowed to evapo- 

 rate, for the skin is rather stiff. Capt. Stewart Van Vliet sent the 

 third cotype (U.S.N.M. No. 2610) to the Museum from Brownsville, 

 Tex. It is quite young, and the head-and-body length is 27.5 mm. 

 The black-margined inner metatarsal tubercle is well developed. The 

 body is shrunken and somewhat distorted. 



The type of Giinther's Siz/o anomalus (B.M. No. 58. 9. 6. 12) is an 

 adult male purchased from Emile Parzudaki, who was a dealer in 

 natural-history specimens in Paris, and is labeled as coming from 

 Mexico. The type does not have the cranial crests developed, the 

 skin is rough and tubercular, and it is clearly an immature individual. 

 The head-and-body length is 43.7 mm. The upperparts are light 

 gray with black spots, and the warts are dark at the base. It has 

 large inner and small outer metatarsal tubercles. 



The type of Bufo levifrons could not be located in the Paris Museum 

 at the time of my visit in April, 1930. Mexico is given as the type 

 locality for this species. A specimen from Mexico collected by Duges 

 (M.H.N.P. No. 643b, parchment label No. 83-289) and labeled as 

 the type does not agree with the figure published by Brocchi. This 

 specimen has a head-and-body length of 53.5 mm. It is briefly 

 described as follows: The tibio-tarsal joint, when the hind limb is 

 carried forward along the body, reaches the posterior margin of the 

 parotoid gland; skin of upperparts strongly tuberculate; cranial crests 

 not developed ; tympanum covered with minute tubercles ; underparts 

 light colored with scattered dark spots; a large black inner and a 

 small light-colored outer metatarsal tubercle. The type of Bufo 

 mexicanus was received from Auguste Salle, according to Brocchi, but 

 no entry of this specimen was found in the catalogue of the laboratory 

 of herpetology of the Paris Museum. 



This burrowing species has a rather compact body, and the skin is 

 often covered with closely set pustulose warts. As a rule it is irregu- 

 larly spotted with dark, though there are occasional individuals that 

 exhibit little or no indication of darker spots. On many of the speci- 

 mens there is a conspicuous white interorbital band that is almost on 

 a line with the vertical white lip stripe below the eye. The underparts 

 are often white with small dark spots. On some of the specimens the 

 cranial crests are lacking. From the variation observed in a series of 



