SYSTEMATIC ACCOUNT OF THE SPECIES. 241 



equalling the distance from tip of snout to centre of eye; mental much larger 

 than rostral; two slightly enlarged postmentals and a few chin-shields slightly 

 enlarged; ventrals smooth, imbricate, rounded, slightly larger than dorsals; 

 scales of limbs rather similar to scales of body. 



Colour: — Pale gray, no markings. The specimens examined are evidently 

 badly bleached. 



Dimensions: — Tip of snout to vent 

 Vent to tip of tail 

 Greatest width of head 

 Tip of snout to ear 

 Fore leg 

 Hind leg 



Remarks: — As to the habits or occurrence in life of this species nothing is 

 known. It appears in so very few of the many collections made in Mexico and 

 Central America that it must be very rare. Dr. L. J. Cole made a very extensive 

 collection of reptiles in Yucatan for this Museum in 1904 but though he collected 

 in Merida the type-locality of this species he never found it there or elsewhere. 



11. Sphaerodactylus difficilis Barbour. 



Sphaerodactylus difficilis Barbour, Mem. M. C. Z., 1914, 44, p. 265. 



Type-locality: — Santiago de la Vega, San Domingo. 



Type:— Type. M. C. Z. 7,834. Paratype M. C. Z. 7,835. A. H. Verrill. 

 Two Paratypes M. C. Z. 5,444 Puerto Plata. M. Abbott Frazar. 



Distribution: — Haiti and San Domingo. 



Diagnosis: — Small, slender, having moderately small weakly keeled, 

 imbricate scales about nine equalling the distance of tip of snout from centre of 

 eye; head and neck with longitudinal markings or the head, neck and body 

 speckled. 



Description: — Type. M. C. Z. 7,834. Snout rather short not conspicu- 

 ously acute; distance of eye from tip of snout and ear about equal; rostral 

 moderate with median grove; nostril between rostral, first supralabial, a large 

 supranasal and two smaller scales; two small scales bcrder the rostral behind 

 with the supranasals; three large and one small supralabial to below centre of 

 eye; supercihary spine present; head above and on sides covered with small, 

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



