4 TTPHLOPID^. 



Kasal shield very large, divided or semidivided, extending on each 

 side of the rostral to the upper surface of the head. 



2. TypUops, p. 7. 



II. Head covered with small uniform scales. 



3. T3rplilopliis, p. 57. 



Fig. 1. 



f r> so 



1. HELMINTHOPHIS. 



Rhinotyphlops (wore Fitx^, Peters, Mon. Berl. Ac. 1857, p. 40. 

 Helminthopiiis, Peters, Mon. Berl. Ac. 1860, p. 517, and Situ. Ges. 



naturf. Fr. 1881, p. 69 ; Bocourt, Miss. So. Mex., Rept. p. 602 



(1882). 

 Idiotyphlops, Jan, Arch. f. Nat. 1861, p. 6, and Arch. Zool. Anat. 



Phys. i. 1862, p. 186, and Icon. Gin. Ophid. p. 32 (1864). 

 Liotyphlops, Peters, Sitzb. Ges. naturf. Fr. 1881, p. 69 ; Bocourt, 



op. cit. p. 501. 



A pair of large prsefrontals and a frontal ; nostril between two 

 nasals. 



Tropical America. 



Synopsis of the Species. 

 I. Praefrontals in contact behind the rostral. 



Ocular shield in contact with the third 



upper labial 1. jiavoterminatus, p. 5. 



Ocular separated from the labials by a sub- 

 ocular 2. frontalis, p. 5. 



