4 TYrHI.OPID^. 



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

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



2. Typhlops, p. 7. 

 II. Head covered with small uniform scales. 



3. TyphlopMs, p. 57. 



Fig. 1. 



vf f ^ 



bo iu 



Skull of Typhlops lumbricalis. 



1. HELMINTHOPHIS. 



Khiuotyphlops i^non Fitz.), Peters, Mon. Berl. Ac. 1857, p. 40. 

 Helminthophis, Peters, Mon. Berl. Ac. 1860, p. 517, and Sitz. Ges. 



naturf. Fr. 1881, p. 69; Bocourt, Miss. Sc. Mex., Rept. p. 502 



(1882). 

 Idiot-\'phlops, Jan, Arch. f. Nat. 1861. p. 6, and Arch. Zool. Anat. 



Pfujs. i. 1862, p. 186, and Icon. Gen. 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. 



tSi/no2>sis of the Species. 

 I. Prsefrontals in contact behind the rostral. 



Ocular shield in contact with the third 



upper labial ." 1. Jlavotemiinatus, p. 5. 



Ocular separated from the labials by a sub- 

 ocular 2. frontalis, p. 5. 



