man. Pp.
205-249, pls. 7-10, 6 figures in text. October 4, 1963.

6. A revision of snakes of the genus Conophis (Family
Colubridae, from Middle America). By John Wellman. Pp.
251-295, 9 figures in text October 4, 1963.

7. A review of the Middle American tree frogs of the genus
Ptychohyla. By William E. Duellman. Pp. 297-349, pls.
11-18, 7 figures in text. October 18, 1963. 50 cents.

*8. Natural history of the racer Coluber constrictor. By
Henry S. Fitch. Pp. 351-468, pls. 19-22, 20 figures in
text. December 30, 1963. $1.00.

9. A review of the frogs of the Hyla bistincta group. By
William E. Duellman. Pp. 469-491, 4 figures in text.
March 2, 1964.

10. An ecological study of the garter snake, Thamnophis
sirtalis. By Henry S. Fitch. Pp. 493-564, pls. 23-25,
14 figures in text. May 17, 1965.

11. Breeding cycle in the ground skink, Lygosoma laterale.
By Henry S. Fitch and Harry W. Greene. Pp. 565-575, 3
figures in text. May 17, 1965.

12. Amphibians and reptiles from the Yucatan Peninsula,
Mexico. By William E. Duellman. Pp. 577-614, 1 figure
in text. June 22, 1965.

13. A new species of turtle, genus Kinosternon, from
Central America. By John M. Legler. Pp. 615-625, pls.
26-28, 2 figures in text. July 20, 1965.

14. A biogeographic account of the herpetofauna of
Michoacan, Mexico. By William E. Duellman. Pp. 627-709,
pls. 29-36, 5 figures in text. December 30, 1965.

15. Amphibians and reptiles of Mesa Verde National Park,
Colorado. By Charles L. Douglas. Pp. 711-744, pls. 37
and 38, 6 figures in text. March 7, 1966.

Index. Pp. 1-770.

Vol. 16. 1. Distribution and taxonomy of mammals of Nebraska. By J.
Knox Jones, Jr. Pp. 1-356, plates 1-4, 82 figures in
text. October 1, 1964. $3.50.

2. Synopsis of the lagomorphs and rodents of Korea. By J.
Knox Jones, Jr., and David H. Johnson. Pp. 357-407.
February 12, 1965.