124 SAURIA. 



7. A more or less distinct continuous series of rather larger keeled scales along each side of the posterior 



half of the back: D. spilopterus, Wiegm. = X). ornatus, Gray. 



B. Nostrils directed upwards. 



8. Tympanum naked : D. dussumieri, p. 125. 



9. Tympanum scaly : D. quinquefasciatus, p. 126. 



II. Long-limbed Dragons, in which the hind limb extends to or beyond the shoulder -joint, if laid forwards. 



A. Nostrils directed upwards ; tympanum naked. 



10. Wings with regular arched black bands : D. taniopterus, p. 126. 



11. Wings with subreticulated lines: D. hamatopogon, Boie. 



B. Nostrils directed outwards. 



12. Tympanum naked : D. bimaculatus, n. sp., p. 127. 



13. Tympanum scaly ; dorsal scales smaller than upper labials : D. lineal us, Daud. 



14. Tympanum scaly ; dorsal scales larger than^ or as large as, the upper labials : D. rostratus, n. sp., 



p. 127. 



Draco volans. 



Draco volans et praepos, L. Syst. Nat. xii. p. 358. 



viridis et fuscus, Daud. Kept. iii. pp. 301, 307. 



daudinii, Dum. ^- Bibr. iv. p. 451. 



viridis, Schleg. Abbild. p. 89. tab. 24. fig. 1. 



volans. Cantor, Mai. Rept. p. 37. 



The length of the hind limb is contained 1-2 or 1'3 times in the distance of the axils of 

 the limbs. Nostrils lateral, directed outwards ; tympanum naked. Dorsal scales subequal 

 in size, as large as the upper labial shields, slightly keeled ; a small short tubercle above 

 the hind part of the orbit ; male with a distinct nuchal crest ; on each side of the back a 

 series of larger, rhombic, keeled, distant scales. Throat and sides of the gular appendage 

 with numerous brown dots. The outer part of the upper surface of the mngs with large 

 irregular black spots ; their lower surface with large rounded spots, which are more or less 

 confluent into bands towards the margin of the wings. 



The colours vary much, not only accordmg to the localities, but also individually ; the 

 brown or black dots on the throat appear to be constant. Cantor describes the colours from 

 living specimens : — Head metallic brown or green, with a black spot between the eyes. 

 Back and inner half of the wing-membrane varied with metallic, iridescent dark brown and 

 rose-colour, in some disposed in alternate transversal bands, with numerous black spots and 

 short irregular waved lines. Outer half of the wing-membrane orange- or rose-coloured, 

 with irregular black transverse spots ; the margins minutely fringed with silvery. Limbs 

 and tail in some with alternate rose-coloured and brown cross bands. Eyelids with short, 

 radiating black lines. Throat and gular sac bright yellow, the former dotted with black ; 



