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194 UNIVERSITY OF KANSAS PUBLS., MUS. NAT. HIST, from southern Sonora as different from other species of Pseudoficima by having light dorsal spots two or more scales wide, eight infralabials, and a double line across the frontal region. Campbell and Simmons (1962:196) reduced hiltoni to subspecific rank based on one specimen from near Espinal that was apparently intermediate between frontalis and hiltoni. Additional specimens from Sinaloa clarify the relationships between the nominal populations. Analyses of ten characters (Table 6) show a complete overlap in all characters throughout the range of the species. These data do not support the subspecific arrangement suggested by Campbell and Simmons (1962:197). We suggest that Pseudoficimia frontalis hiltoni be placed in the synonymy of P. frontalis, which is monotypic as now understood. The first author currently is evaluating the validity of P. pulcherrima and reviewing the generic relationship of Pseudoficimia. All specimens were found at night on the highway. Distribution in Sinaloa.—Occurs throughout the lowland thorn forest and tropical deciduous forest of the state. See Fig. 80. Specimens examined.—30 mi. SSE Alamos [Sonora] (* FAS 9168); 4 mi. NE Cbncordia ("LACM 7040); 26 mi. N Culiacan (* CSCLB 1384); 4 mi. S Culiacan (• AMNH 75753); 34.4 mi. N Elota, Rio (°LACM 7043); 11.5 mi. N Espinal (• UCLA 14644); 0.8 mi. S Guamuchil ('LACM7046); Guirocoba [Sonoia] (• AMNH 63717, holotype of P. hiltoni); 12.8 mi. N Mazadan (" UAZ 16308); 16 mi. N Mazatlan ('LACM 7042); 17.9 mi. N Mazatlan (°LACM 7044); 18 mi. N Mazatlan (" LACM 7045); 18.3 mi. N Mazatlan ("LACM 7041); 61 km. N Mazatlan (»KU 73617); 125 km. NNW Mazatlan (• KU 73618); Colima [state] (* USNM 31424, paralectotype and 31425, lectotype). Literature record.—Presidio (Boulenger, 1894:270; Taylor and Smith, 1942: 243). Additional record.—6.8 mi. N Elota, Rio (SU 24022). Rhadinaea hesperia hesperioides Smith Rhadinaea hesperia hesperioides Smith, Proc. Biol, Soc. Washington, 55:186, December 31, 1942 (type locality, Magdalena, Jalisco). Remarks.—Three specimens {a male, female, and one of unidentified sex) have 154, 149, 153 ventrals; 110, 122 subcaudals (excluding KU 80870); ?-17-17, 17-17-17, 18-17-17 dorsal scale rows; 9-8, 8-8, 8-8 supralabials; and 10-10, 10-9 infralabials (excluding KU 80870). The preoculars are 2-2, postoculars 2-2, temporals 1+2; labials 4-5 enter the eye on all specimens except the male (KU 80870), which was damaged. Distribution in Sinaloa.—Tropical deciduous forest of the southern highlands and foothills. See Fig. 81. Specimens examined.—Santa Lucia (*KU 75629); 19.2 km. (via hvey. 40)
AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 195 NE Santa Lucia, 1890 m. (" KU 80871); 12.3 km. (via hwy. 40) SW Santo Lucia, 1200 m. ('KU 80870). Literature record.—Plomosas (Smith, 1942b: 186 and 1943a:464; Smith and Taylor, 1945:118). Rhinocheilus lecontei antonii Duges Rhinocheilus antonii Duges, Proc. Amer, Philos. Soc, 23:290, 1886 (based on a specimen from San Bias, Nayarit). Rhinocheilus lecontei antonii: Klauber, San Diego Soc. Nat. Hist., 9:314, September 26, 1941. Remarks.—Six females and seven males have the following characteristics, respectively: 188-199 (194.5), 194-202 (197.1) ventrals; 41-48 (44.7), 46-52 (48.5) subcaudals {KU 91420 excluded). For all specimens: dorsal scale rows, 23-25 at the neck, 23-25 at midbody, 19-21 at vent (KU 61100, 73624 excluded); supralabials, 8-8 (excluding the right side of KU 73621); infralabials, 9 9 in nine, 9-8 in one, 8-8 in two and one (KU 73621) has 9 on left (right excluded); preoculars, 1-1 in ten, 2-1 in one, 1-2 in one, 2-2 in one; postoculars, 2-2; temporals, 2 -f- 3 in all except one that has 3 + 3 on left and one that is injured on the right (KU 73621); labials 4-5 enter eye. The coloration agrees with the description of Sonoran specimens by Bogert and Oliver (1945:370). Rhinocheilus lecontei antonii is a moderate-sized nocturnal species and one of the most common snakes encountered in the state. More than 80 specimens were taken on the roads at night from mid- June through August. This species is one of the first to become active with the onset of the rainy season. Their activity drops off markedly in August in contrast to some species which apparently reach peak activity during late July and August. Individuals were most abundant on nights when the air temperature ranged from 26.4° to about 28,2°C. Distribution in Sinaloa.—Throughout the lowlands below about 200 meters, but most abundant from the vicinity of Culiacan southward. See Fig. 82. Specimen* examined.—1 mi. N Cerro Prieto (UAZ 9611); 5,6 mi. SW Charay (CSCLB 1928); 1.4 mi. E Concordia (CSCLB 1927); 7.3 mi. S Concordia (CSCLB 1920); 6 km. SW Concordia (° KU 73622); 2.4 mi. W Concordia (JFC 63:161); 4.8 mi. N Coyotitan (LACM 7061); 0.1 mi. S Coyotitan (LACM 7062); 1908 mi. S Coyotitan (LACM 7076); 29 mi. S Coyotitan (LACM 7075); 2.9 mi. N Culiacan (JFC 83:160); 18.4 mi. N Culiacan (JFC 63:159); 66.3 mi. N Culiacan (LACM 7082); 11.7 mi. S Culiacan (LACM 7055); 21.1 mi. S Culiacan (LACM 7056); 22 mi. S Culiacan (CSCLB 1916); 30 mi. S Culiacan (LACM 7083); 35.2 mi. S Culiacan (LACM 7057); 89.6 mi. S Culiacan (LACM 7058); E) Dorado ("KU 61100); 6.9 mi. N Escuinapa (CSCLB 1929); 0.2 mi. SE Escuinapa (LACM 7079); 8 km. SE Escuinapa ("KU 73625): 18.5 mi. SE Escuinapa (LACM 7080); 20 mi. S Escuinapa (CSCLB 1919); 5.5 mi. S Espinal (CSCLB 1918); 10 km. W La Concha, 3
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PLATE 1 Fie. 1. Tropical Thorn Wood
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PLATE 3 Fit;. 1. Tropical Si-iniari
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PLATE 6 . - /* *! s • . m Tropica
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PLATE 8 Fit:. 1. Subtropical Dry Fo
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