_Specimens examined._--(14). MEXICO, _Colima_: Hda. Paso del Rio, FMNH 100048 (holotype), 100167, 100299, UIMNH 13300, UMMZ 110877 (2), USNM 139729; 7.2 km. SW Tecolapa, UMMZ 115477 (4); _Jalisco_: 17.6 km. SW Autlan, 606 m., KU 102627; 3.2 km. N La Resolana, UMMZ 102100; Bahia Tenacatita, UMMZ 84264. =Syrrhophus nivocolimae= Dixon and Webb _Syrrhophus nivocolimae_ Dixon and Webb, 1966:1-4, Fig. 1 [Holotype.--LACM 3200, from Nevado de Colima (6 airline miles west of Atenquique), Jalisco, Mexico, 7800 feet; collected on July 20, 1964, by Robert G. Webb]. _Diagnosis._--Small frogs, males 18.5-21.1 mm. snout-vent length, only known female 24.1 mm. snout-vent; vocal slits present in males; finger tips widely expanded; first finger shorter than second; inner metatarsal tubercle about three times size of outer; skin of dorsum warty, that of venter smooth; tympanum concealed, its diameter 30.0-39.3 per cent that of eye in males; mid-dorsal brown band from interorbital bar to anus; bands on limbs narrow, dark bands less than one-half width of light bands, upper arm not banded; narrow interorbital light bar. _Remarks._--This species is closely related to _S. modestus_ and differs in color pattern and degree of wartiness of the skin. Dixon and Webb (1966) held that _nivocolimae_ had no close relatives, but the condition of the tympanum, size, nature of the outer palmar tubercle, relative sizes of the metatarsal tubercles, and shape and size of the digital pads all point to a close relationship between _S. modestus_, _S. nivocolimae_, and _S. pallidus_. [Illustration: FIG. 20: Distribution of the species of the _modestus_ group: _interorbitalis_ (open circles), _teretistes_ (solid circles), _modestus_ (open triangles), _pallidus_ (solid triangles) and _nivocolimae_ (square). Arrow indicates locality of sympatry between _modestus_ and _nivocolimae_. Solid line about the localities for _interorbitalis_ is a range estimate based on call records and specimens examined.] Dixon and Webb (1966) reported that _S. nivocolimae_ has a large tympanum (50.0-59.0 per cent diameter of eye). However, my examination of the type series and several other specimens from Jalisco reveals that the largest tympanum/eye ratio is 39.3 per cent. Therefore, the tympanum/eye ratio in _S. nivocolimae_ is in agreement with those for _S. modestus_, _S. pallidus_, and _S. teretistes_ (Table 6). _Etymology._--_niv_, Latin, and Colima (Nevado de), meaning high on the volcano, in reference to the higher distribution of this species (around 2000 meters) than other members of the group. _Distribution._--Known from southwestern Jalisco, Mexico, at moderate to high elevations (600-2400 meters).