122 LIZARDS OF THE PHILIPPINE ISLANDS 



1. Adult male, with gular appendage equal to distance be- 

 tween tip of snout and near elbow, the foreleg being brought 

 back; dorsal scales rather large, unequal, moderately keeled, a 

 row of enlarged keeled scales along sides; male with a distinct 

 nuchal crest; a Y-shaped series of scales on forehead; inter- 

 orbital spot dim or wanting in both males and females ; no 

 nuchal spot. Wing membranes of males yellow to orange, 

 spotted brown, the spots arranged in regular transverse rows; 

 below unspotted. Female with wing membranes black, with 

 numerous, diagonal, threadlike, whitish stripes, occasionally 

 with lighter spots near body, especially in young ; underside with 

 numerous dark spots ; tympanum, with two exceptions, covered. 

 Eighteen specimens from Lubang Island and four from Mount 

 Mariveles, Bataan (this part of Luzon is nearest Lubang Island) . 



2. Gular appendage of adult male equal to distance from 

 tip of snout to forearm or axilla; two to four median scale 

 rows on back enlarged, strongly keeled, the lateral scales smaller 

 than on first group. A row of enlarged keeled scales present 

 on sides, a Y-shaped series of scales on forehead, a distinct in- 

 terorbital spot present in both sexes, a nuchal spot present in 

 females. Wing membranes yellow to orange with numerous, 

 irregularly arranged, brownish spots and a large outer dark 

 spot; below immaculate or with one dark spot; females with 

 membranes black, with numerous diagonal, lighter, fine stripes, 

 and whitish spots near inner border. Four males and four 

 females examined, from mountains of Luzon, near Montalban 

 and Sibul Springs. 



3. Gular appendage equal to distance from tip of snout to 

 axilla or somewhat beyond; six or eight rows of small median 

 keeled scales; scales outside these very small, also strongly 

 keeled; no outer row of enlarged keeled scales; a longitudinal 

 row of enlarged keeled scales on forehead; tympanum naked, 

 smaller than eye opening; wing membranes rather sparsely 

 spotted black on light (yellow?) ground with large outer spot; 

 a very small spot on outer tip of wing below. Two males from 

 Negros.* 



4. Gular appendage fails to reach insertion of arm. Scales 

 on back not very strongly keeled, the median and laterals not 

 clearly differentiated; a longitudinal row of enlarged keeled 

 scales on forehead; tympanum partly naked; wing membranes 



* These specimens were examined through the kindness of Dr. J. W. 

 Chapman, of Silliman Institute, Dumaguete, Oriental Negros, to which 

 institution they belong. 



