MEXICAN TAILLESS AMPHIBIANS 



135 



place of transverse bars; four light-edged transverse dark bands on 

 upper surfaces of tarsus and metatarsus. 

 Specimens examined. — Two, as follows: 



Gastroiheca coronata 



> Type. 



Genus PTERNOHYLA Boulenger 



1882. Pternohyla Boulenger, Ann. and Mag. Nat. Hist., ser. 5, vol. 10, no. 58, 

 p. 326, Oct. [Genotype, Pternohyla fodiens Boulenger, idem, pp. 326, 327, 

 figs. (Presidio, State of Sinaloa, Mexico).] 



This is a monotypical genus. The one known species is apparently 

 as well adapted to a fossorial as to an arboreal life. A distinctive 

 color pattern, a bony casque, a spadelike internal metatarsal tubercle, 

 and absence of parasphenoid teeth characterize this frog. 



PTERNOHYLA FODIENS Boulenger 



1882. Pternohyla fodiens Boulenger, Ann. and Mag. Nat. Hist., ser. 5, vol. 10, 

 no. 58, pp. 326, 327, figs., Oct. — Gunther, 1901, Biologia Centrali-Americana, 

 Reptilia and Batrachia, p. 292, pi. 74, fig. B, Dec. 



1899. Hijlarudis Mocquard, Bull. Soc. Philom. Paris, ser. 9, vol. 1, no. 4, pp. 163, 

 164, pi. 1, fig. 3 (Guadalajara, Jalisco, Mexico). 



Type locality. — Presidio, 50 miles from Mazatlan, State of Sinaloa, 

 Mexico. 



Range. — Pacific drainage of Mexico, from Rosario in Sinaloa south- 

 ward through Nayarit and Jalisco to Colima. 



Remarks.— The type of Pternohyla fodiens (B.M. No. 1882. 11.27.8) 

 was purchased from Alphonso Forrer and agrees with the descrip- 

 tion published by Boulenger. The following supplementary notes 

 were made on this specimen: Head-and-body length, 60.7 mm.; 

 transverse diameter of tympanum, 3.5 mm.; transverse diameter of 

 eye, 5.8 mm.; anterior edge of eye to nostril, 5.2 mm.; posterior 

 margin of bony casque to tip of snout, 18.6 mm.; \\adth of head at 

 level of angle of jav.^s, 20.8 mm.; the hind hmb being carried forward 

 along the body, the tibio-tarsal joint reaches to anterior margin of 

 tympanum; no tarsal fold; very large internal metatarsal tubercle, 

 but no outer one; tip of first finger does not reach apical disk of 

 second; vomerine teeth between and slightly in advance of level of 

 middle of choanae ; upperparts with dark elongate spots arranged or 

 grouped so as to simulate longitudinal stripes; throat with aggrega- 

 tions of small brov.n spots; bell}^ areolate and whitish. 



