116 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



small elongate, juxtaposed, keeled scales, those on snout enlarged; 

 scales on back enlarged, elongate, slightly keeled, imbricate, about 

 nine or ten equaling the distance from tip of snout to centre of eye; 

 mental large, nearly same size as rostral; two large infralabials fol- 

 lowed by a small one to below centre of eye; two small, squarish chin- 

 shields behind mental, followed by flat smaller scales, which cover 

 throat, enlarged but smooth on neck and chest, still larger on belly; 

 limbs with smaller, keeled, imbricate scales; similar on upper surface 



Figure 39 — Sphaerodactylus difficilis: a, Top of head; b, chin; c, side of head; d, middorsal 

 scales; e, dorsal view showing color pattern. U.S.N.M. No. 75001, from Saman£, Domini- 

 can Republic, a-d, X 4; e, X 2. 



of tail, but smooth below, enlarged irregular transverse plates below. 



"Colour. — Gray necked with brown spots, often with longitudinal 

 dark markings on head and neck. Shoulders with or without a pair 

 of white dots, which may or may not be ringed with darker to form 

 a spectacle-like mark. There may be a faint similar mark on the 

 sacral region. 



"Dimensions. — Tip of snout to vent, 28 mm.; vent to tip of tail, 

 31 mm.; greatest width of head, 5 mm.; tip of snout to ear, 8 mm.; 

 foreleg, 8 mm.; hindleg, 9.5 mm. 



"Remarks. — This species is very closely related to notatus and is 

 probably annectent between that species and macrolepis. It is wide- 

 spread throughout San Domingo and Haiti." 



