70 SYNOPSES AND DESCRIPTIONS! 



trous black, except a narrow oral border of yellow. Chin immaculate. 

 Many of the scales of the body are tipped with brown, many with black. 

 (From descr.) Jalapa, Mexico. 



Diadophis. 



Baird <& Girard, 1853. 



Small. Body subcylindrical, slightly depressed, slender; head distinct 

 from the neck, depressed; tail short, tapering. Teeth equal, smooth. 

 Crown-shields normal. Loreal present. Nasal divided. Eyes medium, 

 pupil round. Mouth-cleft deep. Scales smooth, in 15—17 rows. Anal 

 bifid. ' Subcaudals in two rows. 



With pairs of transverse bands ; 



scales in 17 rows annidatus. 



with a white band along each side of head and neck decoratus. 

 with three longitudinal bands of brown fulvivittis. 



with an occipital band ; 

 scales in 15 rows ; 



ventrals 148 — 160 punetatus. 



ventrals about 190 clocilis. 



scales in 17 rows; occipital band rarely absent; 



ventrals more than 200 regalis. 



Diadophis annulatus. 



Enicognathus annulatus Bumertt & Bibron, 1854, JErp. Ghi. VII, 335. 



Head little larger than the neck, slightly convex, muzzle rounded ; tail 

 stout, long, near half as long as the body. Eye moderately large, pupil 

 round. Crown-shields nine, broad. Angle of rostral between internasals 

 nearly a right one. Rostral convex. Loreal small, lower behind than in 

 front. Prefrontals decurved to the loreal. One large preocular. . Postoc- 

 ulars two. Labials eight, fourth, fifth, and sixth in orbit, latter large. 

 Scales smooth, lozenge-shaped, in 17 rows. Ventrals 142. Anal divided. 

 Tail broken. 



BroAvn, tinted with green. Head varied with black on the supraciliaries, 

 temporal region, and in three bars beneath the orbit. Neck tinged with 

 reddish, with pairs of transverse bands on the dorsal rows, followed by 

 three series of vittae or spots of black on the median and third or fourth 

 lateral rows. Flanks and ends of ventrals punctulate with brown. (From 

 descr.) Coban (Haute Vera Paz). 



