CROCODILIANS, LIZARDS, AND SNAKES. 1095 



Calieiite, G. concolor Las been found tlius far in Y'ucatan only, and C. 

 pulchcr in Mexico and Guatemala, while G. Uneatu.s ranges to Panama. 

 The hahit'dt of G.lineaticeps {C. vittatns^) is Guatemala (Capt. J. M.Dow). 



CONOPHIS VITTATUS Peters. 



Co)i02>his vittatus Peters, Monatsber. Akad. Wiss., Berliu, 1860, p. 519, fig. .3. — 

 EocouKT, Miss. Sci. Mex., Rept., 188G, p. 644, pi. xxxviii, fig. 7.— Gunthek, 

 Biol. Ceutr. Amer. Rept., 1895, p. 165. — Boulengek, Cat. Snakes Brit. Mus., 

 2cled., Ill, 1896, p. 123. 



Conophis aumichrastii Cope, Jour. Acad. Nat. Sci. Pbila., 1875, p. 137. 



Dorsal surface gray, brown, or bluish white; three longitudinal dark- 

 brown stripes or bands originate at the muzzle, of which the two lateral 

 pass through the eye and along the sides of the body to the end of the 

 tail. The median stripe divides into two on the nape and continues 

 separate to the end of the tail. Two nasal shields, one frenal, one 

 preorbital; two postorbitals ; seven supralabials, of which the third 

 and fourth are in contact with the eye; between the fifth and sixth and 

 the parietals two long temporals; above the seventh, three; then more 

 rows of temi)oral shields. Nine infralabials, of which the first is in 

 contact, behind the mental, with its fellow of the opposite side, and the 

 pentagonal fifth largest; two pairs of submeutalia, of which the anterior 

 is the larger. Dorsal scales rhomboidal, larger at sides, in nineteen 

 longitudinal rows. Gastrosteges, according to Boulenger, 147-163; 

 urosteges, 57-70 pairs, 



There are three forms, probably subspecies of the G. vittatus, which 

 difler as follows: 



Three dorsal stripes; median five scales and lateral four scales wide. 



C. V. ridens Cope. 

 Four dorsal stripes, each oue and two hall-scales wide; frontal plate twice as long 

 as wide and ecjnal length of muzzle in front of it; temporals 2-3. 



C. V. vittatus Peters. 



Stripes as in C. v. vittatus; frontal plate 2.5 times as long as wide and longer than 



muzzle in front of it; temporals 3-3 C.v, su7nichrastii Cope 



Of these subspecies the U. S. National Museum possesses one specimen 

 of the G. V. videns from Tehuan tepee, from F. Sumichrast; four of the 

 G. V. vittatus from Colina, from J. Xantus, and one from Tehuantepec, 

 from Sumichrast; and one of the G.v.sumichrastii from Guadalajara, 

 from J. J. Major. 



CONOPHIS VITTATUS SUMICHRASTII Cope. 



Conophis sumichrastii Cope, Jour. Acad. Nat. Sci. Phila., 1875, ii. 137. 

 While this form resembles the typical subspecies in coloration, the 

 form of the head and of its plates differs considerably. The muzzle is 

 narrower, so that the prefrontals have a relatively greater anteropos- 

 terior extent. The greater relative elongation is seen in the frontal 

 plate as shown in the diagnosis, an elongation in which the supraoculars 



1 Cope, Jour. Acad. Nat. Sci. Phila. (2), VIII, 1875, p. 137; not of Peters. 



