254 AOAMIDiB. 



1. No orbital spines. 



Tympanum smaller than tlie eye-opening ; 



wing-membranes black-spotted below. 1. volans, ■p. 256. 

 Tympanum smaller than the eye-opening ; 



wing-membranes unspotted below . . 2. reticulatus, p. 257. 

 Tympanum as large as the eye-openiug ; 



snout a little longer than the diameter 



of the orbit 3. guentheri, p. 257. 



2. A large spine-like scale on the supraoUiary border. 



The largest median dorsal scales at least 

 twice as large as the ventrals ; tym- 

 panum as large as the eye-opening . . 4. evet^etti, p. 258. 



Dorsal scales hardly larger than the 

 ventrals ; tympanum smaller than the 

 eye-openiug 5. cornutus, p. 258. 



B. The adpressed hind Umb reaches at least to halfway between 

 the elbow of the adpressed fore limb and the axil. 



1. The largest median dorsal scales at least twice as large as the 



ventrals. 



a. Tympanum, if distinct, smaller than the eye-openiug. 



Wing-membranes above marbled or re- 

 ticulated with black, enclosing round 

 light spots 6. ornatus, p. 259. 



Wing-membranes above with smaU round 

 black spots ; snout not longer than the 

 diameter of the orbit 7. spilopterus, p. 260. 



Wing-membranes above with small round 

 black spots ; snout considerably longer 

 than the diameter of the orbit 8. rostratus, p. 261. 



b. Tympanum naked, as large as the eye-opening. 



A series of strongly enlarged keeled scales 

 along each side of the vertebral Une, 

 separated by a row of small smooth 

 scales 9. timorensis, p. 261. 



2. Dorsal scales little larger than, or as large as, the ventrals. 



a. On each side of the back a series of enlarged, keeled, 

 distant scales. 



Tympanum naked; the male's gular 



appendage much longer than the head. 10. maeulatus, p. 262. 

 Tympanum scaly; the male's gular 



appendage shorter than the head .... 11. bimaculatus, p. 263. 



