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210 UNIVERSITY OF KANSAS PUBLS., MUS. NAT. HIST. Literature records.—36.7 mi. NW Culiacan (Greer, 1965b:237); 13 mi. S Escuinapa (Scott, 1967; 285); 16.2 mi, N Espinal (Campbell and Simmons, 1962:198); about 10 mi. N Mazatlan; 10,5 mi. N Mazadan (Scott, 1967:285); 13.7 mi. N Mazatlan (Campbell and Simmons, 1962:198); 19.5 mi. N Mazadan (Scott, 1967:285). Tropidodipsas philippii (Jan) Leptognathus philippii Jan, Elenco sistematico degli Ofidi . . ., p. 101, 1863 (type locality, Mazatlan, Sinaloa). Tropidodipsas philippi: Boulenger, Catalogue of the Snakes in the British Museum (Natural History), 2:295, 1894. Remarks.—One male has 193 ventrals; 87 subcaudals; 7-7 supralabials; 8-8 infralabials; 15 dorsal scale rows at midbody and 18 black bands on the body and tail. The male reported by Greer (1965b:237) has fewer ventrals (188), subcaudals (81), and white rings (17). Tropidodipsas freiae was described from a single specimen by Shannon and Humphrey (1959b: 220) and placed in the synonymy of T. philippii by Scott (1967:284). Nearly all known specimens were collected at night during or after a light rain. Distribution in Sinaloa.—Known only from the southern lowlands of the state. See Fig. 87. Specimen* examined.—Between Escuinapa and Pahnillas (LACM 7117); 31.6 mi. N Mazadan (LACM 7119); 58 km. N Mazadan (*KU 73640); 53 mi. N Mazatlan {LACM 7118); Teacapan (LACM 7116). Literature records.—3.5 mi. NW Elota {Greer, 1965b:237); 63.5 mi. N Mazadan (Shannon and Humphrey, 1959b :220). Additional record.—57 mi. NW Mazadan (TMM 36932). Family Elapidae Micruroides euryxanthus neglectus Roze Micruroides euryxanthus neglectus Roze, Amer. Mus. Novitates, 2287:4, April 13, 1967 (type locality, sixteen and three-tenths miles northnorthwest of Mazadan, Sinaloa). Remarks.—Duellman (1957b:240) reported an adult male of M. euryxanthus from the vicinity of Mazatlan that has fewer ventrals (210) and more dorsal red scales (113) than those reported in the original description of M. e. australis Zweifel and Norris. Also, none of the white rings are more than one scale wide, whereas all of the white rings of the holotype of australis {Zweifel and Norris, 1955: plate 1, lower left) appear to be more than one scale wide. Roze (1967:4) used the Sinaloan specimen (UMMZ 114637) as the holotype of M. euryxanthus neglectus. Joseph F. Copp kindly supplied data on a second specimen (JFC 62:56), a paratype of neg-
AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 211 lectus (Roze, 1967:4): adult male; ventrals 208; subcaudals 25; dorsal scales 17-15-P; supralabials 7; infralabials 7; preocular 1; postoculars 2; temporals 1 + 2. The snake has 12 red and 12 black body rings; no black markings in the red rings; 107 red scales along the midline; two black and three white tail rings including the tip. This specimen is similar to the holotype in having fewer ventrals than M. e. australis, but is more like australis in the number of red scales along the midline. The holotype is the southernmost known specimen of the genus Micruroides. Distribution in Sinaloa.—Known only from near Mazatlan, but probably occurs in the northern lowlands. See Fig. 88. Specimen examined.—20 mi. N Mazatlin (JFC 62:56). Literature record,—Type locality (Duelhnan, 1957b:240, M. e. australis). Micrurus distans distans (Kennicott) Ehps distans Kennicott, Froc. Acad. Nat Sri. Philadelphia, 12:338, 1860 (type locality, Batosegatchie, Chihuahua). Micrurus distans distans: Zweifel, Amer. Mus. Novitates, 1954:7, June 28, 1959. Remarks.—Zweifel (1959c:7) commented on the nomenclatural history of this species. According to Zweifel, M. d. distans can be identified by the presence of "immaculate scales of the red rings, presence of pale coloration on the anterior supralabials and (usually) snout, and a broad pale head ring with its rear margin behind the posterior tips of the parietal scales." A male and two females have the following characters, respectively: ventrals, 213, 235, 222; subcaudals, 51, 44, ?; black tail rings, 6, 5, ?. All specimens have 7-7 supralabials; 7-7 infralabials; 1-1 preoculars; 2-2 postoculars; 1 + 1/1 -f 1 temporals; and 14 black body rings. On all specimens some of the black body rings are constricted laterally, the anterior supralabials are pale, the pale head band includes the tips of the parietals, and the scales of the red rings lack black tips. Specimens were collected at night on several occasions following light rains, at air temperatures of 24.2° to 26,3°C, indicating the species is active at lower temperatures than most other snakes from the state. Distribution in Sinaloa.—Throughout the lowlands. See Fig. 88. Specimens examined.—9,1 mi. NE Concordia (LACM 7186); 6.5 km. SW Concordia (*KU 73641); El Salado, 90 m. (*KU 95971); La Cruz turnoff, hwy. 15 (LACM 7189); 2.5 mi. E La Cruz (LACM 7187); 9 mi. E La Cruz (LACM 7188); 11.6 mi. N Mazatlan (LACM 7190); Rosario, 150 m. ('KU 73642).
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