_Syrrhophus rubrimaculata_: Smith and Taylor, 1948:48-49. [Illustration: FIG. 8: _Syrrhophus rubrimaculatus_ (upper right, KU 58911, x1.6; lower right, KU 58910, x4) and _S. verrucipes_ (upper left, UIMNH 15995, x1.6; lower left, UIMNH 15989, x3.7).] _Diagnosis._--Small frogs, males 18.2-23.5 mm. snout-vent, females 19.0-22.5 mm. snout-vent length (small sample); vocal slits in males; digital tips scarcely expanded (Fig. 1); first finger shorter than second; outer palmar tubercle reduced in size; inner metatarsal tubercle elongate, twice the size of small, conical outer metatarsal tubercle; diameter of tympanum 35.5-46.5 per cent that of eye in both sexes; dorsum brown with small pale spots (red in life); venter gray. _Remarks._--Previous authors who treated _Syrrhophus_ placed this species in the western complex, because it occurs on the Pacific versant and has a reduced outer palmar tubercle. Duellman (1958) placed _rubrimaculatus_ apart from the other western species, because of its relatively unexpanded digital tips and coloration. The digital tips are like those in _leprus_, which _rubrimaculatus_ resembles. Except for the reduction of the outer palmar tubercle, _rubrimaculatus_ could be a member of the _leprus_ group. _Syrrhophus rubrimaculatus_ is probably best treated as a Pacific derivative of the _leprus_ group, even though the palmar tubercles do not agree. The removal of _rubrimaculatus_ from the western complex results in a more homogeneous remainder and does not greatly increase the heterogeneity of the eastern complex. _Etymology._--Latin, meaning spotted with red; in reference to the colors in life. _Distribution._--Low to moderate elevations on the Pacific versant of southeastern Chiapas, Mexico (Fig. 7); probably extending into adjacent Guatemala. _Specimens examined._--(48) MEXICO, _Chiapas_: Escuintla, UMMZ 88283; 6 km. NE Escuintla, UMMZ 87876-80; La Esperanza, UIMNH 13285, UMMZ 88496-97, USNM 114070 (holotype), 114054-69, 114072; Monte Cristo, UMMZ 88353; 1.3 km. N Puerto Madero, KU 58910-11; Finca San Jeronimo, 600-650 m., UIMNH 55299-312, 55313-16 (cleared and stained). =Syrrhophus guttilatus= (Cope) _Malachylodes guttilatus_ Cope, 1879:264 [Holotype.--USNM 9888, from Guanajuato, Guanajuato, Mexico; collected in 1877 by Alfredo Duges]. _Syrrhopus guttulatus_: Boulenger, 1888:204-06. _Syrrhaphus guttulatus_: Guenther, 1900:317. _Syrraphus guttulatus_: Diaz de Leon, 1904:11. _Syrrhophus guttilatus_: Nieden, 1923:399-400. Kellogg, 1932:125, 127-28. Smith and Taylor, 1948:49, 51. Firschein, 1954:52-54. Gorham, 1966:164. _Syrrhophus smithi_ Taylor, 1940b:43-45, pl. 1 [Holotype.--USNM 108594, from 15 mi. SW Galeana, Nuevo Leon, Mexico, 1575 m.; collected on October 13, 1939, by Hobart M. Smith]. Smith and Taylor, 1948:49, 51. Firschein, 1954:54-55. Martin, 1958:50. Gorham, 1966:167.