119 



Key to the Indo-Australian species. 



A. One praeocular i. D. siibanniilatiis p. 119. 



H. No praeocular 2.. D. tristrigatus p. 120. 



I. DryOjCalamus subannulatus (Bum. & Bibr.). 



Odontoinus suluinnulalus^ Dumeril & Bibron, Erp. Gen. VII 1854, p. 454. 

 Dryocalamtts subannulatus^ Roulenger, Cat. Sn. I 1893, p. 371 (s. syn.). 



Rostral visible from above; nasal divided or partly divided; 

 suture between the internasals as long as or longer than that 

 between the praefrontals; frontal longer than its distance from 

 the tip of the snout, shorter than the parietals; loreal more 

 long than deep, entering the eye; one prae- and two post- 



Fig. 50. Dryocalaiiius subannulatus (D. & B.). Nat. size. Side view of head. 



oculars; temporals 2 -p 2; seven upper labials, third and fourth 

 entering the eye; three or four lower labials in contact with 

 the anterior chin-shields; latter longer than the posterior. Scales 

 in 15 rows; ventrals 225 — 244; anal entire; subcaudals 88 — 107. 



Light brown above, with large, brown, transverse spots 

 across the back; on each side a series of small spots, alternating 

 with the dorsals; two transverse brown streaks on the head, 

 the anterior on the praefrontals, the other between the eyes; 

 a brown spot on the parietals. Lower surface yellowish. Length 

 of head and body 225 mm.; tail 70 mm. 



Type-specimen examined in the Leiden Museum. 



