94 BULLETIN 194, UNITED STATES NATIONAL MUSEUM 



Queseria, Paso del Rio, Tecoman, Santiago; Guanajuato: Buena vista; 

 Jalisco: Guadalajara; Sinaloa: Venadillo. Probably most of the 

 reports for the state of Oaxaca are referable to Microhyla usia gadovii; 

 that for Valles, San Luis Potosi, is based on a young Hypopachus 

 cuneus cuneus. 



MICROHYLA USTA GADOVO (Boulenger) 



Eupemphix gadovii Boulenger, Ann. Mag. Nat. Hist., eer. 7, vol. 12, Nov. 1903, 



p. 552. 

 Microhyla usta Parker, Monograph of the frogs of the family Microhylidae, 



1934, pp. 148-149 (part). 

 Microhyla usta gadovii Taylor and Smith, Proc. U. S. Nat. Mus., vol. 95, 1945, 



p. 603, pi. 32, figs. 5-10. 



TV^e.— (Cotypes) Brit. Mus. Nos. 1903.9.30.259-261. 



Type locality. — San Mateo del Mar, Oaxaca, Mexico. 



Range. — Oaxaca and Chiapas. Specimens are known from Oaxaca: 

 Tehuan tepee (city); Chiapas: LaEsperanza (near Escuintla), Acacoy- 

 agua, Colonia Soconusco, Las Gradas, Tonald, Tapachula. 



Genus HYPOPACHUS Keferstein 



Hypopachus Keferstein, Nadir. Ges. Gottingen, No. 18, 1867, p. 351. 



Genotype. — Hypopachus seebachii Keferstein (==Engystoma variolo- 

 sum Cope). 



Range. — Southern Texas to Brazil, Paraguay, and Bolivia. 



Species. — About 15 species and subspecies, 7 of which occur in 

 Mexico. 



KEY TO MEXICAN SPECIES OF HYPOPACHUS 



1. Width of head 3 times in snout-to-vent length (slightly more or less); 



sides of head and body dark brown, contrasting with dorsal color; 

 ventral surface reticulated with brown enclosing cream spots; 50 mm. 



caprimimus (p. 95) 

 Width of head in snout-to-vent length 3H to 4 times 2 



2. Venter white or cream without markings 3 



Venter reticulated with brown 4 



3. Scattered black spots on sides and groin; spot on femora; a light stripe 



from eye to jaw angle; foot one-third to two-thirds webbed; 41 mm. 



maculatus (p. 95) 

 No distinctive black spots on sides or groin; no light stripe from eye to 

 jaw angle; foot less than one- third webbed; large gland on breast and 

 anterior abdominal region of males usually moderately distinct; 

 44 mm alboventer (p. 95) 



4. Venter colored with reticulations of brown and cream, the cream not 



forming round white spots 5 



Venter reticulated with brown enclosing round cream spots 6 



5. Reticulation very light, often scarcely discernible; in some specimens a 



hair fine median cream line from snout to vent; a series of dark spots 

 on dorsolateral line below which sides are Ughter than back; 41 mm. 



cuneus cuneus (p. 95) 



