[Illustration: FIG. 6: Dorsal views of _Syrrhophus leprus_ showing variation in dorsal pattern (left, UMMZ 121244, x2; right, KU 26106, x1.7). Side of head (UIMNH 42726, x7).] [Illustration: FIG. 7: Distribution of three species of eastern complex _Syrrhophus_: _leprus_ (circles), _rubrimaculatus_ (triangles), and _verrucipes_ (squares).] _Remarks._--My distribution map (Fig. 7) differs somewhat from that of Duellman (1958), who was unaware of specimens reported by Taylor and Smith (1945) from central Veracruz, Mexico. Duellman (1958, 1960) regarded _S. leprus_ as having a gray venter. Neill (1965) characterized his new subspecies on the basis of white venter and spots on the dorsum. Some specimens from throughout the range have only small round spots, instead of vermiculations (Fig. 6). The gray ventral coloration is largely restricted to the population in Los Tuxtlas, Veracruz, but only about 80 per cent of the specimens from the Los Tuxtlas have gray venters, whereas specimens from Guatemala, Oaxaca, Tabasco, and central Veracruz, Mexico, have white venters (rarely gray). Since the specimens from British Honduras are not distinct from specimens throughout most of the range, there is no reason to recognize them as a subspecies. _Etymology._--Greek, _lepra_, leprosy, in reference to the mottled color pattern. _Distribution._--Discontinuous; central Veracruz to British Honduras to low elevations in the foothills of the Sierra Madre Oriental, Los Tuxtlas, Sierra Madre de Chiapas (Isthmus of Tehuantepec (Fig. 7)). _Specimens examined._--(84). GUATEMALA, _Alta Verapaz_: Chinaja, KU 55961-62. _El Peten_: 15 km. NW Chinaja, KU 55963; Piedras Negras, USNM 114085-92; Tikal, UMMZ 117035; Uaxactun, AMNH 55121-22. MEXICO, _Oaxaca_: Cerro San Pedro del Isthmo, UIMNH 35510; Finca La Gloria, USNM 114093; 30.5 km. N Matias Romero, UIMNH 39459, 71969; Santa Efigenia, USNM 10040 (holotype). _Tabasco_: Teapa, UMMZ 113799-800; 13.5 km. W Teapa, UMMZ 120253. _Veracruz_: 27.5 km. N Acayucan, UIMNH 42726; Atoyac, UIMNH 13331, 49296; 3.2 km. N Catemaco, UIMNH 71976-77; Coyame, UIMNH 38995, 38998, 40342; Dos Amates, TCWC 21211; Fortin de Las Flores, FMNH 113751, 113753; Paraja Nuevo, El Suchil, UMMZ 90315; Potrero Viejo, FMNH 113743-50, 126114-18, KU 26104-06, UIMNH 13332-37, UMMZ 88837; San Andres Tuxtla, UIMNH 27123-31, 28611, 71975, UMMZ 115450 (5); San Lorenzo, USNM 123530; 4.5 km. NW Santiago Tuxtla, JDL 992 (skeleton), UIMNH 27122; 32 km. S Sayula, EAL 1696; Tepalapan, 1.6 km. S Catemaco, UMMZ 118222 (2); Volcan San Martin, south slope, UMMZ 118223; Volcan San Martin, Rancho El Tular, UIMNH 35399-400, 40340-41. =Syrrhophus rubrimaculatus= Taylor and Smith _Syrrhophus rubrimaculatus_ Taylor and Smith, 1945:583-85 [Holotype.--USNM 114070, from La Esperanza, near Escuintla, Chiapas, Mexico, collected May 13, 1940, by H. M. and R. Smith]. Duellman, 1958:1-4, 7, 12, 14. Gorham, 1966:167.