86 OPHIDIA. 
4. Glauconia humilis. . 
Rana humile, Baird & Gir. N. Am. Serp. p. 143; Stejneger, Proc. U.S. Nat. Mus. xiv. p. 501 
(1892). 
Siagonodon dugesii, Bocourt, Miss. Sc. Mex., Rept. p. 507, t. 29. figg. 9, 9 a—c, and t. 30. fig. 4. 
Stenostoma tenuiculum, Garman, Mem. Mus. Comp. Zool. Cambr. vili. no. 3, p. 5 (1883). 
Hab. Norvn Averica, California—Mexico, San Luis Potosi (Garman), Presidio 
(Forrer), Colima (Bocourt). 
Fam. TYPHLOPIDZ. 
TYPHLOPS. 
Typhlops, Schneider, Hist. Amph. p. 34 (1801). 
1. Typhlops tenuis. 
Typhlops tenuis, Salvin, Proc. Zool. Soe. 1860, p. 454 ; Boulenger, Cat. Sn. i. p. 28. 
Typhlops basimaculatus, Cope, Proc. Ac. N. Sc. Phil. 1866, p. 320. 
Typhlops perditus, Peters, MB. Ak. Wiss. Berl. 1869, p. 435; Bocourt, Miss. Sc. Mex., Rept. 
p- 499, t. 29. figg. 3, 3 a—c, t. 30. fig. 3. 
Typhlops prelongus, F. Miill. Verh. nat. Ges. Basel, vii. p. 674 (1885). 
Hab. Mexico, Orizaba, Cordova, Teapa in Tabasco (H. H. Smith); GuateMata, Coban 
(Salvin). 
2. Typhlops microstomus. 
Typhlops microstomus, Cope, Proc. Ac. N. Sc. Phil. 1866, p. 125. 
Hab. Mexico, Yucatan. 
I have not seen a specimen of this species. 
HELMINTHOPHIS. 
Helminthophis, Peters, MB. Ak. Wiss. Berl. 1860, p. 517. 
Idiotyphlops, Jan, Arch. per la Zool. i. p. 186 (1861). 
1. Helminthophis frontalis. 
Helminthophis frontalis, Peters, MB. Ak. Wiss. Berl. 1860, p. 517, fig.; Bocourt, Miss. Sc. Mex., 
Rept. p. 502. t. 30. fig. 2. 
Hab. Costa Rica. 
I have not seen a specimen of this species. 
LIOTYPHLOPS. 
Liotyphlops, Peters, SB. Ges. naturf. Freund. 1881, p. 69. 
