182 . OPHIDIA. 
Boa imperator, Daud. Rept. v. p. 150; Dum. & Bibr. Erpét. vi. p. 519; Gray, Viper. Sn. p. 101; 
Peters, MB. Ak. Wiss. Berl. 1869, p. 875; Cope, Journ. Ac. N. Se. Phil. vii. p. 130; 
Jan, Iconogr. Ophid. vi. t. 1; Bocourt, Miss. Sc. Mex., Rept. p. 519, t. 30. figg. 8, 8a-c; 
Garman, N.-Amer. Rept. p. 8; Cope, Bull. U.S. Nat. Mus. no. 32, p. 65; Boul. Cat. Sn. 
i. p. 119; Sumichrast, Bull. Soc. Zool. Fr. 1880, p. 179. 
Boa eques, Eyd. & Soul. Voy. Bonite, Zool. Rept. p. 144, t. 4; Dum. & Bibr. Erpét. vii. p. 521 ; 
Gray, Viper. Sn. p. 101; Jan, Iconogr. Ophid. vi. t. 2. 
Hab. Mexico, Ventanas in Durango (Forrer), Colima (Xantus), Atoyac in Vera Cruz 
(H. H. Smith), Vera Cruz (Cope), Tehuantepec (Sumichrast), Yucatan (Schott) ; 
British Honpuras (Godman, Dyson); GuateMaua, Vera Paz (Owen); Nicaragua 
(Cope); Costa Rica (Godman).—Ecuapvor (Fraser). 
‘To describe this form as Boa constrictor, var., or even simply as Boa constrictor, 
would be as justifiable as to distinguish it under a separate name. ‘The case is 
perfectly analogous to that of Corallus hortulanus, Central-American specimens having 
fewer series of scales (viz. 65-79) than the Boa constrictor of Tropical America south 
of the Isthmus of Panama and east of the Andes (85-95). But the larger-scaled form 
extends farther southwards than Corallus cooki, viz. into Western Ecuador and Peru. 
According to Sumichrast, it is common on the Isthmus of Tehuantepec. Mr. Champion 
observed it at Bugaba, in the State of Panama, but he did not procure specimens. 
2. Boa mexicana. 
Boa mexicana (Rapp), Jan, Iconogr. Ophid. p. 82; Bocourt, Miss. Sc. Mex., Rept. p. 521, t. 30. 
fige. 9, 9a, 6; Cope, Proc. Am. Phil. Soc. xxii. p. 882 (1885). 
Boa diviniloquax, var. mexicana, Jan, Iconogr. Ophid. v. t. 4. 
Hab. Mexico, Jicaltepec (Cope). 
Scales in 55 rows. 
Fam. ELAPID. 
| ELAPS. 
Elaps (Schneider), sp., Wagler, Syst. Amph. p. 193. 
Elaps, Ginther, P. Z. S. 1859, p. 81. 
These snakes are known in Mexico by the name “ coralillas.” 
1. Elaps fulvius. 
Coluber fulvius, Linn. Syst. Nat. i. p. 381. 
Elaps fulvius, Dum. & Bibr. Erpét. vii. p. 1215; Giinth. Cat. Col. Sn. p. 235, and Ann. & Mag. 
N. H. 1859, iv. p. 169; Jan, Iconogr. Ophid. xl. t. 2. fig. 2; Cope, Bull. U.S. Nat. Mus. 
no. 82, p. 86. 
