COLUBRID^E. 351 



Genus ISCHNOGNATHUS. 



139. Ischnognathus occipitomaculatus (Storer). Spotted- 



headed Snake. 



Hab. Nova Scotia. 



a-f. Presented by A. Downs, Esq., C.M.Z.S., Oct. 3, 1871. 



Genus TRETANORHINUS. 



140. Tretanorhinus nigroluteus, Cope. Black-and-Yellow 



Snake. 



Hab. Central America. 



a. Purchased, Sept. 12, 1871. From Monkey Hill, near Colon. 

 See Gunther, Ann. & Mag. N. H. ser. 4, vol. ix. p. 27. 



Genus HETERODON. 



141. Heterodon madagascariemis, Dum. & Bibr. Sharp- 



snouted Snake. 



Hab. Madagascar. 



a. Presented by E. Newton, Esq., C.M.Z.S., Nov. 27, 1863. 



Genus COLUBER. 



142. Coluber guadrilineatus, Pall. Four-lined Snake. 

 Hab. Egypt. 



a, b. Purchased, Aug. 8, 1863. 



143. Coluber asculapii, Sturm. ^Esculapian Snake. 

 Hab. Central Europe. 



a-d. Keceived in exchange, Sept. 21, 1868. 

 e,f. Purchased, June 6, 1871. From Dalmatia. 



144. Coluber guttatus, Linn. American Black Snake. 

 Hab. North America. 



a, b. Purchased, June 28, 1867. 



Genus SPILOTES. 



145. Spilotes variabilis (Max.) . South- American Rat- Snake. 

 Hab. South America. 



a. Presented by Dr. Wucherer, C.M.Z.S., Sept. 1860. 



b. Presented by Mr. Hounslow, Nov. 5, 1869. 



c. Purchased, June 28, 1870. 



