942 



REPOET OF NATIONAL MUSEUM, 1898. 



plate, its external margin with the upper margin of the frenal; the 

 frontal plate is about as broad as long, narrower jwsteriorly, but less 

 so than in Conophoracoccinea; supraoculars broader posteriorly; occip- 

 itais of moderate size, pentangular; nostril large, deeply excavated, 

 in nearly the center of a large and conspicuous nasal plate, somewhat 

 pyriform; a long and very narrow frenal, lying between the second and 

 third supralabials and the prefrontal; but one preocular, which is 

 quadrangular, resting on the third supralabial; two postoculars, the 



upper much larger than those which 

 follow; the eye in contact inferiorly 

 with the third and fourth ; body long 

 and slender, depressed; scales, of 

 which there are fifteen rows, quad- 

 rangular, smooth, and shining, their 

 posterior margins rounded, the three 

 inferior rows larger than the others; 

 gastrosteges appearing to a slight 

 extent upon the flanks; tail short, 

 with a somewhat blunt extremity. 



Milk-white above, with thirty-four 

 transverse black bands, including 

 one upon the posterior part of the 

 head; six complete rings of black upon the tail, and one incomplete 

 just behind the anus; jaws, chin, throat, and abdomen white; inter- 

 spaces between rings upon under part of tail white. 



Cat. No. 8030; upper labials, 7; gastrosteges, 158 + 1 ; urosteges, 34; total length, 

 323 mm. ; length of tail, 53 mm. 



A variety of this species was described by Kennicott under the name 

 of C. 0. annulatus,^ based on two specimens from the Colorado Desert. 

 They difier from the type only in the continuance of the black cross- 

 bands across the abdomen, forming complete rings. 



Cat. No. 2105; upper labials, 7; gastrosteges, 172 ; urosteges, 43 ; rowsof scales, 15; 

 total length, 350 mm. ; length of tail, 64 mm. 



The color of the specimens of this species, which is light in alcohol, is 

 in life yellow, with some pink intermixed, forming a handsome combi- 

 nation of colors. 



Chionactis occipitalis occipitalis Halloivell. 



Fig. 240. 



Chionactis occipitalis Hallo well. 



X 1.5. 



Colorado Desert, Colorado. 



Cat. No. 2105, U.S.N.M. 



' Proc. Acad. Nat. Sci. Phila., 1856, p. 310. 



