184. HOMAIOOEANITTM. 225 



17. Homalocranium moestum. 



Homalocranium mcestum, Qiinth. Ann. ^ Mag. N. M. (3) xii. 1863, 

 p. 352 ; Bocourt, Miss. So. Mex., Rept. p. 583, pi. xxxyi. fig. 9 

 (1883) ; Oilnth. Biol. C.-Am., Mept. p. 152, pi. lii. fig. E (1895). 



Tantilla mcesta, Cope, Proa. Ac. PUlad. 1866, p. 126. 



Eye nearly half as long as the snout. Rostral small, a little 

 broader than deep, scarcely visible from above ; internasals not half 

 as long as the prsefrontals ; frontal hexagonal, obtuse-angled in 

 front, acute-angled behind, longer than its distance from the end of 

 {he snout, shorter than the parietals ; nostril between two nasals, 

 the posterior of which is in contact with the praeocular ; two post- 

 oculars'; temporals 1-|-1; seven upper labials, > third and fourth 

 entering the eye ; first lower labial separated from its fellow, the 

 aymphysial in contact with the anterior chin-shields ; four lower 

 labials in contact with the anterior chin-shields, which are longer 

 than the posterior. Scales in 15 rows. Ventrals 140-148 ; anal 

 divided; suboaudals 55-63. Blackish brown above and below, 

 throat, temples, and occiput yellowish white. 



Total length 300 millim. 



Guatemala. 



a. $ (V. 148 ; C. P). Peten. O. Salvin, Esq. [C.]. 



(Type.) 



18. Homalocraniuiu vermiforine. 



Lioninia vermiformis, Sallow, Proo. Ac. Philad. 1860, p. 484. 

 TantUla vermiformis, C(ype, Proc. Ac. Philad. 1861, p. 74, andJoum. 

 Ac. Philad. (2) viii. 1876, p. 145. 



Snout prominent. Eostral large, acute behind ; frontal hexa- 

 gonal, large, somewhat longer than broad ; nostril between two 

 nasals ; two postoculars ; seven upper labials, third and fourth 

 entering the eye ; symphysial in contact with the anterior chin- 

 shields. Scales in 15 rows. Ventrals 122; anal single; sub- 

 eaudals 26. Whitish above, with numerous small brown spots ; 

 sometimes a narrow black vertebral line ; head brown above, lighter 

 on the snout, with a whitish blotch on the occiput ; lower parts 

 white. 



Total length 130 millim. ; tail 18. 



Nicaragua. 



19. Homalocranium breve. 



Homalocranium breve, Gunth. Biol. C.-Am., Bept. p. 150 (1896). 



Eye not half as long as the snout. Eostral a little broader than 

 deep, well visible from above ; internasals more than half as long 

 as the praefrontals ; frontal hexagonal, obtuse-angled in front, acute- 

 angled behind, scarcely longer than broad, longer than its distance 

 from the end of the snout, shorter than the parietals ; nostril 

 between two nasals, the posterior in contact with the praeocular ; 



VOL. m. Q 



