MEXICAN TAILLESS AMPHIBIANS 177 



with vestigial web at base; vomerine teeth in transverse rows between 

 choanae; other characters similar to preceding diagnosis. 



Two cotypes (B.M. No. 57. 10. 28. 49) from Mexico, a half-grown 

 and a young individual, purchased from £. Parzudald. Head-and- 

 body length, 47.5 mm. ; the hind limb being carried forward along the 

 body, the tibio-tarsal joint reaches to between eye and tip of snout; 

 vomerine teeth in transverse rows at level of posterior margins of 

 choanae ; coloration faded (in alcohol) ; skin similar to other cotypes. 



Boulenger based his Hyla nigropunctata in part on these cotypes 

 of H. lichenosa, which he states differ from H. venulosa in having the 

 tympanum one-third the diameter of the eye, and in part on three 

 additional specimens. One of the cotypes of this species (B.M. 

 Nos. 81. 10. 31. 20) was collected at Jalapa in Vera Cruz by C. T. 

 Hoege, a collector employed by F. D. Godman. The following notes 

 were made on this specimen: Head-and-body length, 62.8 mm.; 

 transverse diameter of tympanum, 3.6 mm.; transverse diameter 

 of eye, 5 mm.; anterior edge of eye to nostril, 5.8 mm.; the hind limb 

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

 to anterior margin of eye; throat, chest, and abdomen, and under 

 surface of thighs coarsely areolate; vomerine teeth in transverse 

 rows at level of posterior margins of choanae. 



The two remaining cotypes (B.M. No. 59. 9. 20. 2), a half-grown 

 and a young individual, have a general coloration (in alcohol) that 

 is very similar to Giinther's Vera Cruz specimens. The larger indi- 

 vidual has a head-and-body length of 42 mm. ; the hind limb being 

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

 anterior margin of eye; and vomerine teeth are in transverse rows at 

 level of posterior margins of the choanae. 



Giinther ®^ has already remarked that "this species shows a some- 

 what perplexmg amount of variation in the shape of the vomerine 

 series, size of the tympanum, development of cuticular glands, and 

 coloration." Topotype specimens agree with the original description 

 of lichenosa and are sufficiently like Hyla venulosa to be considered 

 the same species. Giinther placed Boulenger's H. nigropunctata in 

 the synonymy of //. venulosa. 



The type of Cope's Hyla spilomma, which was collected by Francis 

 Sumichrast and is now lost, seems to have been a young individual 

 with fingers united at base by a vestigial web. Another young speci- 

 men collected at Santa Teresa m Nayarit (U.S.N.M. No. 46829) has 

 a small tympanum, and the vomerine teeth are abnormal in that they 

 are located between the choanae. 



A living specimen collected at Presidio in Sinaloa by Alphonso 

 Forrer is described by Boulenger ®^ as follows : 



M Gunther, A. C. L. Q., Biologia Centrali- Americana, ReptUia and Batrachia, p. 273, Sept., 1901. 

 •3 Boulenger, O. A., Description of a new genus and species of frogs of the family Uylidae. Ann. and Mag. 

 Nat. Hist., ser. 5, vol. 10, no. 58, pp. 327, 328, Oct., 1882. 



