Specimens examined.—Total of 63, as follows: Aguascalientes: 16 km. N of Aguascalientes, UIMNH 27149; 17 km. E of Aguascalientes, UIMNH 36222; 5 km. SW of Aguascalientes, KU 29495; Cavillito, UIMNH 28134; 11 km. N of Rincon de Romos, UIMNH 40359-60; 2 km. N of San Francisco de los Romos, UIMNH 27569. Chihuahua: USNM 8321 (2 specimens); Semachique, CNHM 11825. Coahuila: Castanuelas, MCZ 407. Distrito Federal: Lago Xochimilco, UIMNH 18709; Pedregal, UMMZ 99790. Durango: Coyotes, CNHM 1497; Hacienda Magdalena, USNM 46365; Llano Grande, UMMZ 113634. Guanajuato: USNM 16442; Acambaro, KU 45003; Irapuato, UIMNH 35055. Jalisco: Atemajac, USNM 46385; Guadalajara, USNM 24969; 5 km. SE of Guadalajara, KU 29508; Jamay, AMNH 19848-9, 19851-2; 3 km. WNW of Lagos de Moreno, KU 27727; 5 km. NW of Sayula, UMMZ 101933. México: Atzocozlco, AMNH 19850; Chalco, USNM 110889; San Juan Teotihuacán, EHT-HMS 5378, 5383, MCZ 16051. Michoacán: 6 km. E of Carapan, AMNH 69940; 3 km. W of Carapan, UMMZ 114598; 14 km. W of Morelia, UMMZ 104969; Tacambaro, USNM 46557; Tacícuaro, USNM 110888; 11 km. W of Zacapu, UMMZ 104968. Puebla: Alseseca, UIMNH 36221; Atlixco, USNM 46433; Puebla, AMNH 19856; 30 km. N of Puebla, USNM 110887; Tecamachalco, UMMZ 88688; 16 km. SSE of Tecamachalco, UMMZ 114597; Tehuacan, UMMZ 88687; 22 km. N of Tehuacan, EHT-HMS 5377. San Luis Potosí: USNM 46554; 26 km. SW of San Luis Potosí, UIMNH 28133. Veracruz: 3 km. W of Acultzingo, KU 23978; Cumbres de Acultzingo, UIMNH 36224, 36226, UMMZ 114596; Párajo Verde, USNM 110892; questionably from Potrero Viejo, UMMZ 89358-9. Zacatecas: 16 km. E of Somberete, UIMNH 27147; 1 km. SW of Tiburcio, KU 33599; 3 km. ESE of Troncoso, KU 29494; 10 km. W of Villa de Arriaga (San Luis Potosí), UIMNH 27151; 24 km. NW of Zacatecas, UIMNH 6393; 13 km. SE of Zacatecas, UIMNH 27148; 26 km. SE of Zacatecas, UIMNH 27568.

Pituophis deppei jani Cope

Arizona jani Cope, Proc. Acad. Nat. Sci. Philadelphia, p. 369, 1860.

Pituophis deppei jani, Stull, Occas. Papers Mus. Zool. Univ. Michigan, no. 250, p. 2, October 12, 1932, Bull. U. S. Natl. Mus., no. 175, p. 42, April 23, 1940; Smith, Zool. Ser. Field Mus. Nat. Hist., vol. 29, p. 145, February 29, 1944; Smith and Taylor, Bull. U. S. Natl. Mus., no. 187, p. 107, 1940.

Type.—United States National Museum, No. 1522, from Buena Vista, Coahuila, obtained by Lieutenant Darius N. Couch.

Diagnosis.—This subspecies is characterized by solid body-blotches that are black anteriorly and brown posteriorly, anterior dorsal interspaces six or more scales in length, and the absence of dark stripes or rows of spots on the anterior part of the body. There are 215 to 235 ventrals, 52 to 68 caudals, and 21 to 31 dorsal body-blotches. The position of the lateral intercalary spots and lateral streaks are the same as in deppei deppei.

Variation.—Throughout the range of this subspecies the posterior body-blotches are brown and noticeably lighter than the anterior ones. Juveniles are colored like adults. Specimens from the northern part of the range (Nuevo León and Tamaulipas) have 21 to 28 (average 24.0) dorsal body-blotches and 7 to 11 (average 8.9) scales in the interspace between the first and second dorsal body-blotches, as compared with specimens from the southern part of the range (Hidalgo, Queretaro, and San Luis Potosí), which have 24 to 31 (average 27.7) dorsal body-blotches and 6 to 10 (average 7.8) scales in the first interspace. Likewise, there is a difference in the number of ventrals between the northern and southern samples; those from the north have an average of 228.8 ventrals, and those from the south have 222.0. In all of these characters the southern sample shows trends towards the southern subspecies, deppei, which has fewer ventrals, fewer scales in the first interspace, and more dorsal body-blotches.

Distribution.—Eastern part of the Mexican Plateau and lower leeward slopes of the Sierra Madre Oriental from Hidalgo and Queretaro northward to southeastern Coahuila.

Specimens examined.—Total of 28, as follows: Coahuila: Buena Vista, USNM 1522; 50 km. W of La Rosa, EHT-HMS 5374. Hidalgo: Ixmiquilpan, USNM 110890-1; 24 km. S of Ixmiquilpan, EHT-HMS 5373; Jacala, UMMZ 80937; 35 km. E of Pachuca, UMMZ 99552; 16 km. E of Tulancingo, KU 40357. Nuevo León: Ojo de Agua near Galeana, CNHM 33564-5. Queretaro: Cadereyta, UMMZ 99791-3. San Luis Potosí: Charcas, UMMZ 77256-8; San Diego, UMMZ 77254-5; 24 km. NE of San Luis Potosí, UIMNH 18711; 30 km. NE of San Luis Potosí, UIMNH 27150, 28135. Tamaulipas: Miquihuana, MCZ 19544-50.

Pituophis lineaticollis lineaticollis Cope, new combination

Arizona lineaticollis Cope, Proc. Acad. Nat. Sci. Philadelphia, p. 300, 1861.

Pituophis lineaticollis, Stull, Occas. Papers Mus. Zool. Univ. Michigan, no. 250, p. 2, October 12, 1932, Bull. U. S. Natl. Mus., no. 175, p. 47, April 23, 1940.

Pituophis deppei lineaticollis, Smith, Proc. U. S. Natl. Mus., vol. 93, p. 460, 1943; Smith and Taylor, Bull. U. S. Natl. Mus., no. 187, p. 108, 1945.

Pituophis deppei brevilineata Schmidt and Shannon, Fieldiana-Zool., vol. 31, p. 79, February 20, 1947.