228 SPHAERODACTYLUS. 



so that very close examination reveals a fine reticulate appearance, tail j-ellow. 

 Colour singularly unvarying (Field notes). These males were the types of S. 

 flavicaudus Barbour. 



Colour: — Female. Brilliantly cross-banded with pairs of wavy cross-bars; 

 the nuchal band usually very wide and dark and including a pair of white spots. 

 Tail boldly ringed with black and white. 



Dimensions: — Tip of snout to vent 30 mm. 



Vent to tip of tail 26 mm. 



Greatest width of head 6 mm. 



Tip of snout to ear 7 . 5 mm. 



Fore leg 8 mm. 



Hind leg lOmm. 



Remarks: — I had supposed that decoratus and flavicaudus were distinct 

 species. I had long known that they were very similar in squamation, I find now, 

 however, that some specimens of each type are absolutely the same in squama- 

 tion. The colour shows a sex-linked dichromatism such as is so conspicuous in 

 picturatus, scaber and perhaps many other species of which now we only know 

 one sex or the other. It may be looked for in anthracinus for example. 



The species is rare on New Providence where only the banded females have 

 been taken, so also on Rum Cay. Mr. Owen Bryant, however, found both sexes 

 common in chinks and crannies of walls and houses at Mangrove Cay, Andros 

 Island. In 1911 Dr. Rosen (Lunds univ. arsskrift, 1911, n. f. sers. 2, 7, no. 5, 

 p. 27) recorded its presence at Mastic Point also in Andros Island. Otherwise, 

 it has not appeared in the literature. Its origin is probably to be traced to the 

 Cuban torrei or to the immediate ancestors of that species. 



2. Sphaerodactylus gibbus, sp. nov. 

 Plate 1, fig. 2; Plate 10, fig. 5-8. 



Type-locality: — Stocky Island, Exuma Caj's, Bahama Islands. 



Types.— Type. M. C. Z. 13,436; Paratypes M. C. Z. 13,435, 13,437. 

 C. J. Maynard. 



Distribution : — The Exuma Cays. INIaynard found it on Stocky Island and 

 on a small Cay opposite Roseville, Exuma Island. 



Diagnosis: — Heavily built, stocky, coarsely spotted with large dots; the 



