104 



BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



belong in the genus Eleutherodadylus. Contrary to Noble's assump- 

 tion, at least one of the cotypes of Lithodytes latrans (U.S.N.M. No. 

 10058) has typical, well-developed, T-shaped terminal phalanges, 

 and there is no reason to suspect that this modification does not occur 

 in the remaining cotypes. A dissected specimen of this species was 

 found to have the usual Eleutherodadylus type of sternum, without 

 a bony style and with a cartilaginous mesosternum with bisagittate 

 extremity. 



Specimens examined. — Nine, as follows: 



Eleutherodadylus augusti 



ELEUTHERODACTYLUS BEATAE (Boulenger) 



1903. Hylodes beatae Boulenger, Ann. and Mag. Nat. Hist., ser. 7, vol. 12, no. 



71, pp. 552, 553, Nov. 

 1922. Syrrhopus mystaceus Barbour, Proc. Biol. Soc. Washington, vol. 35, p. 



112, Oct. 17 (Cerro de los Estrapajos, Vera Cruz). 



Type locality. — Among moist dense shrubs at La Perla, near Orizaba, 

 at an altitude of 6,000 feet. State of Vera Cruz, Mexico. 



Range. — Vicinity of Jalapa and Orizaba in Vera Cruz, Mexico. 



Remarks. — The type of Syrrhopus mystaceus (M.C.Z. No. 8241) has 

 the same peculiar white black-edged streak on the upper lip as the two 

 cotypes of Eleutherodactylus beatae (B.M. Nos. 1903.9.30.236-237). 

 Unlike the latter, mystaceus has converging linear dermal ridges on 

 the back, but both have a discoidal abdominal fold. Vomerine teeth 

 are present in the type of S. mystaceus, but they are minute and can 

 be seen only with a lens. Furthermore, there is a trace of a web 

 between the toes. 



The cotypes of Eleutherodactylus beatae do not have converging 

 dorsal dermal ridges inclosing an hourglass-shaped area, and in addi- 

 tion the diagnosis published by Boulenger may be supplemented as 

 follows : 



B.M. No. 1903. 9. 30. 236: Head-and-body length, 26.2 mm.; 

 transverse diameter of tympanum, 2.7 mm.; transverse diameter of 

 eye, 2.7 mm.; anterior edge of eye to nostril, 3.2 mm.; the hind limb 

 being carried forward along the body, the tibio-tarsal joint reaches 

 barely beyond tip of snout; a distinct crested tarsal tubercle or ridge 

 about midway, but no tarsal fold; inner metatarsal tubercle of me- 

 dium size, outer small and conical; subarticular tubercles large ; a few 



