18 BULLETIN 194, UNITED STATES NATIONAL MUSEUM 



Range. — High mountain crests ( — 7,000 feet) in eastern central 

 Veracruz. Specimens recorded from the type locality, and from 

 nearby localities in Puebla. 



THORIUS NARISOVALIS Taylor 



Thorius narisovaUs Taylor, Univ. Kansas Sci. Bull., vol. 26, 1939 (1940), pp. 

 416-418, pi. 47, fig. 3. 



Type.— EB.T-RMS No. 17859. 



Type locality. — Cerro San Felipe, 15 kilometers northeast of 

 Oaxaca, Oaxaca, Mexico, elevation 2,600 to 3,000 meters. 



Range. — Kjiown from the vicinity of the type locality (including 

 Cerro San Luis) and Reyes, Oaxaca. 



THORIUS TROGLODYTES Taylor 



Thorius pennatulus Tatlok (nee Cope), Univ. Kansas Sci. Bull., vol. 25, 1938 

 (1939), pp. 293-294; vol. 26, 1939 (1940, pp. 414-416 (part), pi. 47, fig. A. 



Thorius troglodytes Tatlor, Univ. Kansas Sci. Bull., vol. 27, 1941, pp. 110-112, 

 pi. 3, fig. 4. — Taylor and Smith, Proc. U. S. Nat. Mus., vol. 95, 1945, 

 p. 535, pi. 19. 



Type.~ERT-B.MS No. 17791. 



Type locality. — Two miles south of Acultzingo, Veracruz, Mexico. 

 Range. — Kno^vn from the type locality and immediately adjacent 

 areas in the state of Puebla, at an elevation of about 7,000 feet. 



Subfamily Plethodontinae Boulenger 



Plethodontinae Boulenger, Catalogue of the Batrachia Gradientia of the British 

 Museum, ed. 2. 1882, p. 51. 



KEY TO MEXICAN GENERA OF PLETHODONTINAE 



1. Tongue attached in front; septomaxillae present 2 



Tongue boletoid, free; one premaxilla; bony septomaxilla usually if not 



invariably absent 4 



2. Two premaxillae present Ensatina (p. 19) 



One premaxilla present 3 



3. Digits 4r-4; some if not all forms with several rows of maxillary teeth. 



Batrachoseps (p. 19) 

 Digits 4-5, distinct, unwebbed Aneides (p. 20) 



4. No sublingual fold present; vertebrae amphicoelous 5 



A sublingual fold present; vertebrae never typically amphicoelous (ante- 

 rior part of centrum partly or wholly filled with bony deposit) 6 



5. Digits completely or almost completely webbed or palmate, the tips, if 



free, not widened; no distinct subterminal pads present; maxillary 



teeth not typically pleurodont Bolitogiossa (p. 22) 



Digits with at least the outer series of phalanges free on outer toes; toes 

 widened, truncate Mag'nadigita (p. 21) 



6. A double series of enlarged dorsal glandules; skull well ossified; diminutive; 



12 costal folds; nostril large Parvimolge (p. 20) 



No double series of glandules along middorsal line 7 



