DRACO 127 



less than diameter of orbit ; rostral wide and low usually, and 

 smaller than mental, usually about twice as wide as high, 

 bordered behind by five or six small subequal scales, and nar- 

 rowly in contact with first upper labial ; nasal scale large, conical, 

 separated from rostral and labials by two or three rows of scales ; 

 nostril round, craterlike, lateral, directed outward and slightly 

 backward; head scales rather variable, strongly keeled; inter- 

 orbital region narrow, supraorbital region rather clearly de- 

 lineated by a series of more or less enlarged scales, beginning 

 with three or four greatly elongated keeled scales, which are 

 found above and in front of anterior border of orbit; a small, 

 rather rounding tubercle above posterior part of orbit ; the supra- 

 orbital scales vary, those on inner part larger, those along pos- 

 terior outer part very small ; a series of longitudinally enlarged 

 scales on snout, usually taking the form of the letter T, I, or Y 

 (inverted) ; eight to ten upper labials, the last usually largest; 

 an equal number of lower labials; tympanum unsealed, a few 

 enlarged scales between tympanum and orbit ; four scales border 

 mental, outer largest; male with a slight nuchal crest, barely 

 indicated in female; dorsal scales rather regular, not or slightly 

 keeled, about thirty-five across back ; on outer part on each side 

 near parachute a broken series of enlarged, keeled, distant scales ; 

 scales on arms, legs, and abdomen strongly keeled; foreleg 

 stretched forward almost reaches the point of snout; adpressed 

 hind leg reaches shoulder; gular appendage of male nearly as 

 long as head; that of female very much smaller; lateral flap^ 

 on side of neck as wide as distance from orbit to tip of snout; 

 a prominent row of serrated scales on posterior aspect of thigh. 

 Color in life. — Upper surface with a metallic, slightly irides- 

 cent gloss, greenish gray to bluish gray with numerous more 

 or less distinct, broad, irregular, dark bands, traces of which 

 are frequently found on wing membranes; a distinct nuchal 

 spot; head and neck with various dark spots, usually an inter- 

 orbital spot, and a prominent, roundish, black spot behind angle 

 of jaws with a minute white center; tail barred with dark and 

 light bands; wing membranes striated, above with thin bluish 

 white lines, twelve to fifteen in number, running lengthwise, 

 the ground color bluish gray; below wing membranes with nu- 

 merous large black spots; chin with darker and lighter 

 reticulations ; belly frequently with black dots ; gular appendage 

 bluish white to greenish gray, to yellowish, usually paper white, 

 with indistinct darker areas. Female has two broad distinct 

 black bands, beginning at base of neck flaps, crossing neck, 



