70 PROCEEDIXGS OF THE ACADEMY OF [Jan., 



Diadophis amabilis B. and G. 



I. c, 113 ; D. docilis and D. pulchellus B. and G., I. c, 114, 115 •, D. 

 a. amabilis, D. a. 'pulchellus, D. a, docilis and D. a. stictogenys 

 (part) Cope, I. c, 616, and Rep. Nah Mus., 747-750 ; Goromlla 

 amabilis Boul., I. c, II, 2(J7 ; J), amabilis Van Den., I. c, 164. 



''' In this species the frontal is broader behind than in either of the 

 others; upper labials 7 (occ. 8); temporals 1-1 (2); scales in 15 

 rows;^the form is more elongate than in pnnetatas, the ventrak 

 ranging from 182-210; subcaudals 53-63. Length 470 mm. 

 (tail 80). 



The coloration is much as in 2^unctatns ; the spots on the ventrals 

 are small and irregular, and the nuchal half-collar is almost always 

 present. 



Ilab. — Texas to the Pacific coast; south to Sonora. 



Diadophis regalis B. cand G. 



I. c, 115 ; D. regalis regalis and Z>. r. arnyi Cope, I. c, 615, and Rep. 

 Nat. Mus., 744, 745 ; Coronella regalis Boul., I. c, II, 208, 



The frontal is narrow behind, as m2mnctatus; scales in 17 rows; 

 upper labials 7 (occ. 8); temporals 1-1 (2); ventrals 183-237; 

 subcaudals 5G-75. Length 570 mm. (tail 100); being the largest 

 of the genus. 



Ashy to brownish black; belly yellow or reddish with small 

 black spots; the nuchal collar is generally absent. 



Hab. — Illinois to Arizona; south to Vera Cruz. 



OPHIBOLUS B. and (J. 



I. c, 82 ; Cope, I. c, 607 ; Osceola B. and G., I. c, 13:3 and Cope, I. c, 

 606; Coronella (part) Boul., I. c, II, 188; Osceola and Ophibolus 

 Cope, Hep. Nat. Mus., 881, 902. •* 



Maxillary teeth smooth, slightly increasing posteriorly, no inter- 

 space; one loreal ; one prcocular ; two internasals ; two nasals; 

 scales smooth, with two pits, in 19-25 rows; anal entire ; size 

 large and stout to small and slender; head slightly distinct. 



Hab. — North America and Mexico. 



Key to the Species. 



a. — Scales in 21 rows; dorsal spots brown or red with black bor- 

 ders; or rings around body, 1.0. doliatus. 



^^ Lampropeltis Filzinger, lately exhumed, is regarded as a nomen nudum 

 for the reasons given under Entwtiia. 



