28. COLUBER 661 



Bascanium constrictor COPE, Proc. U. S. Nat. Mus., Vol. XIV, 1891 

 (1892), p. 624 (part). 



Zamenis constrictor BOULENGER, Cat. Snakes Brit. Mus., Vol. I, 1893, 

 p. 387 (part); COPE, Report U. S. Nat. Mus., 1898, 1900, p. 791 

 (part). 



Zamenis constrictor flaviventris DITMARS, Reptile Book, 1907, p. 285, 



pi. LXXXIX, fig. 2; RUTHLING, Copeia, No. 15, 1915. 

 Coluber constrictor vetustus GRINNELL & CAMP, Univ. Cal. Publ. Zool., 



Vol. 17, No. 10, 1917, p. 189; COWLES, Journ. Entomol. & Zool., 



Pomona College, Vol. XII, No. 3, 1920, p. 66; STEPHENS, Trans. 



San Diego Soc. Nat. Hist., Vol. Ill, No. 4, 1921, p. 64. 

 Coluber constrictor flaviventris STEJNEGER Si BARBOUR, Check List N. 



Amer. Amph. Rept., 1917, p. 79 (part); BLANCHARD, Copeia, 1921, 



No. 90, p. 6. 

 Coluber constrictor mormon VAN DENBURGH & SLEVIN, Proc. Cal. Acad. 



Sci., Vol. XI, 1921, pp. 28, 36, 40, 44. 



Description. Head rather long, with flattened top and 

 and rounded snout. Rostral plate large, about as high as 

 wide, hollowed below, and bounded behind by internasal, 

 anterior nasal, and first labial plates. Plates on top of head, 

 a pair of internasals, a pair of prefrontals, supraocular and 

 part of upper preocular of each side, long frontal, and a 

 pair of large parietals. Anterior and posterior nasals dis- 

 tinct. Loreal well-developed. Preoculars normally two, 

 but sometimes united. Postoculars two, upper a little larger 

 than lower. Temporals normally two followed by two, 

 but may be 2+3, 1+2, 2+1, or 1 + 1. Seven or eight su- 

 perior and eight, nine, or seven inferior labials, next to last 

 of upper and fifth (or fourth) of lower largest, third and 

 fourth or fourth and fifth superior reaching eye, first pair 

 of inferior meeting on median line. Genials in two pairs, 

 equal or either pair a little larger. Scales on body smooth, 

 in 17 rows. Anal plate divided. Gastrosteges varying in 

 number from 1 62 to 181. Urosteges in two series of from 

 79 to 102. 



The color above in adults is green, olive, or yellowish 



