_Tomodactylus saxatilis_, having lumbar glands, also resembles three species referred to the genus _Syrrhophus_. _Tomodactylus macrotympanum_ was described by Taylor (1940:496, 497) as having a large, moderately distinct lumbar gland; the species was referred to the genus _Syrrhophus_ by Dixon (_op. cit._:384). According to Firschein (1954:55), _Syrrhophus smithi_ and _S. petrophilus_ have elongate lumbar glands shaped like those in _Tomodactylus_. _Tomodactylus saxatilis_ resembles _macrotympanum_, _smithi_ and _petrophilus_ more than it does other species; all four attain large maximal sizes, and have lumbar glands, mostly smooth ventral surfaces, three palmar tubercles (sometimes absent in _saxatilis_), and usually contrasting dorsal patterns (reduced to flecks and spots in all species except _saxatilis_). _Tomodactylus saxatilis_ differs from _macrotympanum_ in having an extensive marbled dorsal pattern and a small tympanum, and differs from _smithi_ and _petrophilus_ in having a marbled dorsal pattern and the tips of the outer two fingers widened and truncate. _Tomodactylus saxatilis_ differs from all other named species of _Syrrhophus_ in having conspicuous lumbar glands and in lacking inguinal glands. _Remarks._--The characteristics delimiting the genera _Tomodactylus_ and _Syrrhophus_ are not agreed upon by all workers (see discussions by Firschein, 1954:50; Langebartel and Shannon, 1956:164; and Dixon, 1957:383). I have referred _saxatilis_ to the genus _Tomodactylus_ on the basis of a lumbar gland, which was considered a distinguishing character for the genus by Smith and Taylor (1948:46) and Langebartel and Shannon (1956:165). Lumbar glands are longer than broad, at least one third the distance from axilla to groin, lateral and usually high, and often conspicuous and protuberant. The elevation or flatness of the lumbar glands seems to be due to individual variation; living specimens in the field had conspicuous and protuberant, or non-elevated, indistinct lumbar glands. Lumbar glands are not to be confused with inguinal glands, which are roundish, often yellowish, sometimes diffuse, lateral but low, often inconspicuous, and usually not protuberant. Inguinal glands occur in the genus _Microbatrachylus_ and in some species of _Eleutherodactylus_, and have been described as flat, or low, or small, or indistinct for most species of _Syrrhophus_.