()30 REPORT OF NATIONAL MUSEUM, 1898. 



Division IV. 

 A. Four siiprn ocular plates, 



1. Loreal plate elevated, extending up to the rather longitudinal rhomboid 



interiiasal. 



Posterior edge of loreal plate above the middle of second labial; mental 

 plate long and pentagonal. Appressed limbs overlapping. Scales of 

 body in 24 rows. Dark olive green above. Sides with 2 narrow 

 white stripes, the upper separated by 4 rows of olive scales; their 

 interspace and a narrow margin above coal black or gray. Beneath 

 greenish livid, the tip of chin white. Upper labials dusky with white 

 stripe E. anthracinus Baird. 



Form stout; apjiressed limbs overlapping by a little; scales in 26 rows. 

 Above blackish olive; below green; a black lateral band with a pale 

 border above and below E. pluvialis Cope. 



Form elongate; appressed limbs separated by length of anterior limb. Tail 

 large. Scales in 26 rows. Light brown, with a dark lateral band 

 bordered by paler above and below E. pachijurus Cope. 



2. Loreal low, in contact with the widely transverse iuterfrontonasal. 



a External parietal separated from seventh labial by temporal scales. 



Larger; 28 rows of scales; appressed limbs overlapping extensively; 

 sides black, head reddish , E. sumiehrastii Cope. 



Posterior edge of loreal in line with that of second labial. Large plate 

 at end of chin divided transversely. Scales of body in 28 rows. Light 

 olive green above. Sides with 2 yellowish lines, the upper not bor- 

 dered above with dusky, and separated by 6 rows of olive scales. 

 Sides rather darker olive. Beneath olive green, more yellowish under 

 the head. Upper labials pure yellowish E. fetragrammus Baird. 



Similar in form to last. Body cylindrical; color entirely black every- 

 where var. funehrosus. 



Posterior edge of loreal marking middle of second upper labial ; post- 

 symphyseal undivided ; appressed limbs meeting. Scales in 26 rows. 

 Lead colored above, light olive below; 2 light lines extend from side 

 of head to a little behind axilla E. brevilineatiis Cope. 



Scales in 22 to 24 rows ; appressed limbs widely separated ; parietals sepa- 

 rated by interparietals; brown, with a lateral black band yellow bor- 

 dered above and below; sometimes a median pale stripe. 



E. lynxe Wiegmann. 

 a a External parietal not separated from eighth superior labial by tempo- 

 rals. Scales in 22 to 24 rows ; appressed hind limbs widely separated ; 

 parietals separated by interparietal ; brown, with a lateral black band 

 pale-bordered above aud below; sometimes a pale median dorsal 

 stripe E. hrevirostris Giinther. 



Three supraocular plates. 

 External i)arietals separated from seventh labial by temporal scales; i>arieta]8 

 separated by interparietal; ajipressed limbs widely separated; scales 

 22 to 24 rows; side black, with pale borders and pale median stripe. 



E. furcirostris Cope. 



External parietals broadly in contact with seventh labial; parietal inclosed 



behind by interparietal; appressed limbs widely separated; scales 22 



rows; sides dark brown, back golden brown E. dtujesH Thominot. 



