7 o 



1. Snout slightly longer than the dia- 

 meter of the orbit ; gular sac as long 

 as the head ; membranes olive above, 

 edged with reddish, with five black 

 transverse bands, sometimes indistinct 



2. Snout as long as the diameter of the 

 orbit ; gular sac one and one third 

 time the length of the head (scar- 

 cely indicated in the female); mem- 

 branes red above with black spots 



3. Snout shorter than the diameter of the 

 orbit ; gular sac one time and a half 

 or one time and three fourths the 

 length of the head ; membranes deep 

 black above, with small yellow spots 



b. The hind limb reaches beyond the axilla. 

 * Male with a slight nuchal fold . . . 

 ** Male without nuchal fold. 



1. A lateral series of widely-distant, 

 enlarged, keeled scales ; membranes 

 black above 



2. A few widely separated, enlarged, 

 keeled scales; membranes grey- 

 brown above, with five indistinct 

 black cross bands 



3. A single enlarged, keeled scale on 

 each side, nearer to the hind limbs ; 

 membranes with whitish longitu- 

 dinal lines and indistinct dark 

 transverse bands . 



1 8. D. formosus, p. 83. 



19. D. haematopogon, p. 84. 



20. D. melanopogon, p. 84. 



21. D, taeniopterus, p. 85. 



22. Z?. obscurus, p. 85. 



23. D. microlepis, p. 86. 



24. D. intcrmedius, p. 86. 



i. Draco volans L. 



Draco volans, Linn. Syst. Nat. I 1766, p. 358. 



Draco volans, Boulenger, Cat. Liz. I 1885, p. 256 (s. syn.). 



Head small; snout not or a little longer than the diameter 

 of the orbit; nostril lateral, directed outwards; tympanum 

 naked '), smaller than the eye-opening. Head-scales very une- 

 qual, keeled; a A -shaped series of larger scales on the snout; 

 at the posterior corner of the orbit a small tubercle and on 

 each side of the neck a few tubercles; seven to ten upper 

 labials. Gular sac longer than the head. Male with a low 



i) The character of the tympanum being naked or scaly is among the genus 

 Draco often very doubtful. 



