1886.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 393 



131559 : 131 + 1 + 93 : 330, 97 mm . 



The two specimens representing this species are intermediate in char- 

 acters between the typical JV r . compressicauda and the N. sipedon fasciata, 

 bnt are quite distinct from either. The tail is longer than in any speci- 

 mens of either. From the V. c. walkeri the 2T. c. birittata differs in a 

 number of minor points. These are the much wider dorsal bands, the 

 postocular baud, the distinct black bauds of the nape and of the in- 

 ferior region, and the reduced number of dorsal rows of scales: 



13659 1 

 13692 ; 1 



Georgiana, Fla. 

 do 



1883 ! William Wittfleld . 

 1883 i do 



Alcoholic. 

 Do. 



Eutaenia sirtalis Linn. Volusia. 

 Eutsenia sackeni Kennicott. 



This species is distributed over Florida generally, and ranges as far 

 westward as Mobile, Ala., from which point specimens were sent me 

 by my friend, Dr. Joseph Corson, U. S. Army. It is the most slender 

 species of the genus, and is characterized by the form of the first row 

 of scales. These are narrow, differing very little from those of the other 

 rows. Like them they are strongly keeled, aud are notched at the apex. 

 The form originally described has no dorsal stripe. Specimens of this 

 kind were sent me from Volusia. Specimens from Georgiana, belonging 

 to the National Museum, and from Mobile, have a dorsal stripe with 

 blackish borders. Two Volusia specimens have seven superior labials, 

 while one has eight. Two specimens from Mobile have eight superior 

 labials, and four from Georgiana have the same. In one of the latter 

 the colors, including the stripes, are obscure. 



Liodytes alleni Garman. Helicops alleni Garman; Liodytes Cope. Not uncommon 



throughout the peninsula. 

 Ancistrodon piscivorus L. Generally distributed. 

 Crotalophorus miliarius L. Generally distributed. 

 Crotalus adamanteus adamanteus Beauv. Found everywhere. 



The largest specimen in the National Museum measures 6 feet in 

 length. Holbrook writes of specimens of 8 feet, and Admiral Mc- 

 Cauley informs me that he has seen specimens of that size on the islands 

 off Pensacola. This species is, then, the largest of the venomous snakes 

 of the Western Hemisphere, and only exceeded in length by two or 

 three of the larger Najidse of the Old World, which are, however, of 

 much more slender form. 



GENERAL REMARKS. 



Of the species and subspecies above described, there are peculiar to 

 Florida the following: • 



Contia pugcva Cope. 



Ophibolus doliatus pcwallelus Cope. 



Coluber guttata* sellatus Cope. 



Coluber rosaceus Cope. 



Xatrix usta Cope. 



Xatrix compressicauda compsolama Cope. 



Xatrix compressicauda walkeri Yarrow. 

 Xatrix compressicauda compressicauda Kcixu. 

 Xatrix compressicauda birittata Cope. 

 Euta iiia sach ni Keuu. (Ranges to Mobile.) 

 Liodytes alleni Garman. 



