SYNOPSES AND DESCRIPTIONS. 127 



Labials nine, third largest, separated from the orbit by two scales, second 

 forming a border to the pit. Scales keeled, in 23 rows. Yentrals 162. 

 Anal entire. Subcaudals 55, entire. 



Yellow, with scattered spots or dots on head and body; belly light 

 yellow. Central America to Mexico. 



Teleuraspis nummifer. 



Atropos nummifer Ruppell, 1845, Museum Senckenbergianum, 313. 

 Bothrops nummifer Jan, 1863, Elenc. Sist., 126. 



Stout; head short, triangular, broad behind; tail short, near one eighth 

 of the total. Eye moderate, pupil erect. Crown covered with small car- 

 inate scales. Sur>raciliaries small. Scales of the side of the face small. 

 Scales all keeled, in 25 rows, dorsal keels not reaching the end of the 

 scale. Ventrals 132. Anal entire. Subcaudals 33, entire. 



A dorsal series of rhomboidal darker-edged brown spots, sometimes com- 

 plete and distinct, and sometimes triangular and alternating across the 

 back, but united in such a manner as to form a zigzag series. A series 

 of irregular-shaped black spots on the flank and another series alternating 

 with these on the ends of the ventrals. Posteriorly the borders of the 

 dorsal rhombs unite with each other, and the lateral spots inclosing lighter 

 spaces on the flanks. Ventrals yellowish in front, becoming dark leaden 

 posteriorly spotted with light. Labials, infralabials, chin-shields, and scales 

 below the neck white. A dark band behind the eye, above the hinder 

 labials to the neck. End of tail lighter. (Jan.) Guatemala, Mexico. 



