184 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



at Brownsville, Tex., and future collecting may show that it occurs 

 also south of the Rio Grande in the State of Tamauhpas, This 

 species is not Usted in the key since there are no Mexican records. 

 H. variolosus seems to be restricted in Mexico to the Pacific coast, 

 where it has been found as far north as southern Sinaloa. A quite 

 differently marked and much brighter-colored species, H. inguinalis, 

 is known to occur as far north as the Lake Peten district of northern 

 Guatemala. This species may possibly occur also in the adjoining 

 states of Mexico. The habits and life histories of these narrow- 

 mouthed toads are not on record. All three have loose leathery 

 skins, and they may hide, as does Gastrophryne, under old logs and 

 other debris. 



HYPOPACHUS VARIOLOSUS (Cope) 



1866. Engystoma variolosum Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 18, 

 p. 131, May. 



1867. Hypopachus seebachii Keferstein, Nachr. konigl. Ges. Wiss. Univ. Gottin- 

 gen, no. 18, p. 352, July 24 (Costa Rica). 



1883. Hypopachus oxyrrhinus Boulenqer, Ann. and Mag. Nat. Hist. ser. 5, vol. 

 11, no. 65, p. 344, May (Presidio near Mazatlan, Sinaloa). 



Type locality. — Arriba, Costa Rica. 



Range. — From near Mazatlan in Sinaloa southward through Jalisco 

 to Costa Rica. 



Remarks. — The type specimen of Cope's Engystoma variolosum 

 (U.S.N.M. No. 6486) was collected at Arriba in 1863 by Charles N. 

 Riotte, who was at that time the United States minister to Costa 

 Rica. It is fairly well preserved, although the original color pattern 

 has been somewhat obscured by the preservative and the light, and 

 the left hind leg is missing below the knee. The measurements of 

 the type are as follows: Head-and-body length, 35.5 mm.; transverse 

 diameter of eye, 3.2 mm.; anterior edge of eye to nostril, 2.4 mm.; 

 width of head at level of posterior angles of jaws, 9.8 mm. 



Hypopachus seebachii, which was collected by Professor von Seebach 

 during his travels in Costa Rica in 1865, was recognized as a new 

 genus and species by Peters. Two years later. Cope ®^ pointed out 

 that H. seebachii was a synonym of his H. variolosus. Boulenger 

 thought that specimens collected by Alphonso Forrer at Presidio 

 near Mazatlan in Sinaloa represented a new species, which he named 

 Hypopachus oxyrrhinus. The following notes relate to these two 

 cotypes: Smaller individual (B.M. No. 1882. 12. 5. 8): Head-and- 

 body length, 27.5 mm.; transverse diameter of eye, 3.3 mm.; ante- 

 rior edge of eye to nostrU, 1.9 mm.; the hind limb being carried for- 

 ward along the body, the tibio-tarsal joint reaches to barely beyond 



" Cope, E. D., Seventh contribution to the herpetology of Tropical America. Proc. Amer. Philos. 

 Soc, vol. 11, no. 82, p. 167, July 16, 1869. 



