40. THAMNOPHIS 849 
191. Thamnophis marcianus (Baird & Girard) 
Marcy’s GARTER-SNAKE 
Plate 93 
Eutainia marciana Bairpv & Girarp, Cat. N. Amer. Rept., Pt. I, 1853, 
p- 36 (type locality, “Red River, Arkansas”= near Cache 
Creek, Oklahoma). 
Eutenia marciana Bairp, U. S. Mex. Bound. Surv., Vol. I, Rept., 
1859, p. 17; Cope, Bull. U. S. Nat. Mus., No. 1, 1875, p. 41; Yar- 
row, Bull. U. S. Nat. Mus., No. 24, 1883, p. 118 (part). 
Eutenia nigrolateralis Brown, Proc. Acad. Nat. Sci. Phila., 1889, p. 
421 (type locality, Tucson, Arizona). 
Tropidonotus ordinatus var. marcianus BouLeNnGER, Cat. Snakes Brit. 
Mus., Vol. I, 1893, p. 210. 
Eutenia elegans marciana Cope, Report U. S. Nat. Mus., 1898 (1900), 
p- 1044; Brown, Proc. Acad. Nat. Sci. Phila., 1g01, p. 24; BaILey, 
N. Amer, Fauna, No. 25, 1905, pp. 28, 48; Dirmars, Reptile Book, 
1907, p. 229, pls. LXVI, figs. 2, 7, LXX, fig. 2. 
Thamnophis marciana RuTHVEN, Bull. Am. Mus. Nat. Hist., Vol. XXIII, 
1907, p. 589. 
Thamnophis marcianus RutTHvEN, Bull. U. S. Nat. Mus., No. 61, 1908, 
p- 58; Van Densurcu, Proc. Cal. Acad. Sci., Ser. 4, Vol. III, 
1912, p. 154; Van DenBurcH & Srevin, Proc. Cal. Acad. Sci., 
Ser. 4, Vol. ITI, 1913, p. 420; GrinnELL & Camp, Univ. Cal. Publ. 
Zool., Vol. 17, No. 10, 1917, p. 179; STEJNEGER & Barsour, Check 
List N. Amer. Amph. Rept., 1917, p. 101; Van DenBurcH & 
Sevin, Proc. Cal. Acad. Sci., Ser. 4, Vol. VIII, No. 6, 1918, p. 261, 
pl. 14. 
Description—Head distinct from neck, flat-topped, 
with narrow, rounded snout, and temporal regions some- 
times swollen. Eye moderate. Rostral large, bounded be- 
hind by internasal, anterior nasal, and first labial plates. 
Plates on top of head: a pair of internasals, a pair of pre- 
frontals, a frontal, supraocular of each side, and a pair of 
parietals. Anterior and posterior nasals distinct. One loreal. 
One or rarely two preoculars. Three or four postoculars. 
Temporals normally one followed by two or three, some- 
times 2+3. Eight, (rarely seven) superior and 10 (rarely 
