21. STEEPTOPHOEFS. 293 



2. Streptophorus lal)iosus. 



Streptopliorus labiosus, Boeourt, Miss. Sc. Mex., JRept. p. 650, 



pi. xxxii. fig. 6 (1883). 

 Ninia labiosa, Cope, Bull. U.S. Nat. Mus. no. 32, 1887, p. 75. 



Eostral about once and a half as broad as deep, visible from 

 above ; frontal as broad as long, as long as its distance from the 

 end of the snout, shorter than the parietals ; loreal but little longer 

 than deep ; two postoculars, the upper fused -with the supraoculars ; 

 temporals 1 + 2, keeled; seven upper labials, third and fourth 

 entering the eye, fifth, sixth, and seventh keeled ; four lower labials 

 in contact with the anterior chin-shields ; posterior chin-shields 

 short. Scales in 19 rows, all strongly keeled. Ventrals 145 ; anal 

 entire ; subcaudals 100. Dark brown above, with an orange collar ; 

 upper lip and lower parts yellow ; a brown dot in the middle of 

 each ventral. 



Total length 313 miUim. ; taU 102. 



Guatemala. 



3. Streptophorus atratus. " 



Coluber atratus, Sallow. Proc. Ac. Philad. 1845, p. 245. 

 Streptophorus sebse, Dum. §• Bibr. vii. p. 515 (1854) ; Gunth. Cat. 



p. 16 (1858) ; Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 27, and 



Icon. Gin. 12, pi. iii. flgs. 4-6, & 13, pi, i. fig. 1 (1865) ; Boeourt, 



Miss. Sc. Mex., Bept. p. 546, pis. xxxii. fig. 7, & xxxiii. fig. 1 



(1883). 



drozii, Dum. Sf Bibr. t. c. p. 518 ; Gunth. I. c. 



lansbergi, Bum. Sf Bibr. I. c. ; Jan, II. cc. p. 26, 1. 13, pi. i. 



fig. 2 ; Boeourt, I. c. p. 551, pi. xxxii. fig. 9. 

 Elapoidis fasciatus, Hallow. Journ. Ac. Philad. (2) iii. 1855, p. 36, 



pi. iv. 

 Streptophorus atratus, Cope, Proc. Ac. Philad. 1860, p. 76. 

 Nini^ atrata, Cope, t. c. p. 340, and Bull. U.S. Nat. Mzis. no. 32, 



1886, p. 74. 



• lansbergii. Cope, Proc. Ac. Philad. 1860, p. 340. 



sebse, Cope, I. e. 



Streptophorus maculatus, Peters, Mon. Berl. Ac. 1861 , p. 924 ; 



Boeourt, I. c. p. 648, pi. xxxiii. fig. 3. 



sebse, vars. maculatus, collaris, schmidti, drozii, Jan, II. cc. 



Ninia aebae, subsp. tessellatus, Cope, Journ. Ac. Philad. (2) viii. 



1876, p. 145. 



spilogaster, Peters, Sitzb. Ges. naturf. Fr. 1881, p. 49. 



Streptophorus maculatus, var. pavimentatua et tessellatus, Boeourt, 



I. c. pp. 549, 560, pis. xxxii. fig. 8, & xxxiii. figs. 2 & 4. 



Eostral once and a half to twice as broad as deep, more or less 

 visible from above ; internasals and supraoculars smaU ; frontal 

 about as broad as long, as long as its distance from the end of the 

 snout shorter than the parietals ; loreal once and a half to twice as 

 long as deep ; two postoculars (rarely one) ; temporals 1+2 ; seven 

 or eight upper labials ; four or five lower labials in contact with 

 the anterior chin-shields ; posterior chin-shields small. Scales in 



