^^iHOiI' ] riiOCKEDINGS OF THE NATIONAL MUSEUM. G47 



11 — C(»ii(iiiiu'(l. 



1. 'rciiiporal scales, 1-2 — Coiititiued. 



' * Scales in seventeen rows ; superior labials eij^lit. 



Frontal narrow ; head very distinct ; no dorsal stripe nor lateral spots except 

 antcriorlj' E. I'hrijxoctpliahi. 



* " * Scales in nineteen rows; superior labials eij^lit. 



Form slender ; head very distinct ; eye large, frontal jdato narrow ; belly, dor- 

 sal and indistinct white lateral strij)e; sides black spotted; a largo 

 nuchal black spot A". ciirtopHis. 



Form robust, head distiuct,f rontal jilate wide ; largt; black nuchal spots ; labials 

 and belly uniform yellow ; dorsal and lateral stripes very distinct, sep- 

 aiated by nuiform brown E. aiirala. 



Form robust, head little distinct; fronlai wide; lateral stripe indistinct, a yel- 

 low dorsal stripe ; no nuchal spots E. inftrnalix. 



Form stout, head little distinct, eye moderate; labials dark bordered; stripes 

 wnntiufr; one row of largo reddish brown bordered dorsal spots; small. 



E. phruax. 



Labials dark l)ordered ; no stripes; six rows of small black spots. 



E. Humichrastii. 



' * * * Scales in ninetoon (17) rows; superior labials seven. 

 <j Two preoculars (sometimes united). 



Head scarcely distinct; two or three rows of spots on o.ach side. 



E. leptocephala. 

 (ui One ])reocular. 



Head scarcely distinct; postgonials short; stripes indistinct, connected by a 

 single series of brown crossbars on each side E. scalaria- 



Head little distinct; form slender; stripes very distinct; yellow, separated liy 

 black or brown; the scales with yellow keels; lateral band l)lai.k 

 bordered below E. ]iiilchnlatii8. 



Form stout, head distinct; postgenials larger than pregenials; two rows of 

 spots on each side, sometimes connected longitudinally above or be- 

 low ; stripes pale , E. sirtalia. 



2. Temporal scales 3-2. 



* Scales in tweuty-ono rows ; superior labials eight. 



Frontal wide, reaching preoculars; second row of scales as wide as first; 

 stripes distinct ; separated by two rows of spots ; a broad black band 

 beiow lateral stripe; labials brown bordered E. niijrilitlHs, 



III. Second row of scales ketded ; oriiit bounded below by a single labial. 



* Scales in twenty-one rows ; superior labials eight. 

 1. Temporals l-'A. 



Oculars ;'.-:! ; labials longer than high ; loreal longer than high; muzzle narrow ; 

 si!vcn rows of si)ots ; no stripes > E. iiiitltim a ml a la. 



IV. Second row of scales smooth, like the lirst ; others with keels. Orbit bcmnded 



by two superior labials. 



* Scales in twenty ime rows; superior labials eight. 



Two ju'cocuiars ; temporals 1-1; superior labial.s larger than high ; rostral i>lnte 

 transverse and cap-shaped. Light brown with small rufous spots 



anteriorly /.'. nij'opunclata. 



" " Scales in nineteen rows ; su|ierior labials eight. 

 1. Temporals 1-2. 



()iiilars2-3; loreal longer than high; In-ad little distinct; dusky, strij)es want- 

 ing or indistinct E. milanoqaster. 



