OPHIDIA— COLUBRIDAE— EUTAENIA ELEGANS. 545 



Genus EUTAENIA, Baird and Girard. 



A number of changes in the arrangement and nomenclature of the 

 species of this genus have been made by Professor Cope, according to his 

 new check-list ; and, for the purpose of comparison, the new arrangement 

 is here given with his permission, as well as his new synopsis. 



Synopsis. 



I. Lateral stripe on third and fourth rows of scales ; rows 19 : 



A. Scales little or not spotted : 

 * Dorsal band complete, light-colored : 



Tail more than 0.35 of total length; sides pale below lateral line; 



to 3| E. saurita. 



Tail less than 0.33 in length ; black lateral band bordered by two 



rows of black scales E. faireyi. 



Tail 3 J times or more in total length ; light below last line, 



E. proximo. 



** Dorsal band incomplete ; all the scales keeled E. sackenii. 



AA. Scales above and below lateral band with quadrate black spots : 



f Superior labials 7 ; 19 series scales E. radix. 



ft Superior labials 8 ; 21 rows scales : 



Three rows spots on each side on scales ; belly cross-lined ; a 



black chevron on neck E. macrostemma. 



Three rows minute spots not covering scales ; no black chevron ; 

 lateral band on third row of scales only var. megahps. 



II. Lateral stripe on second and third rows of scales : 



f 21 rows scales ; 8 superior labials ; one dorsal stripe weak or wanting : 

 Lateral spots obsolete; no dorsal band. Yellow bands on labials; 



a black chevron on neck E. hammondii. 



Lateral spots large, distinct; yellow bands as above. .E. marciana. 

 Lateral spots small; no bands on head ; belly variably plumbeous, 



E. vagrans. 

 Muzzle a little longer (type nearly black) .... subsp. angustirostris. 

 A broad dorsal band ; no spots ; no yellow band or chevron ; sides 



black to orbit . E. elegant. 



35 z 



