88 Proceedings of the Biological Society of Washington. 



Color above dark brown ; a yellowish white band extending completely 

 around the top of the head, starting from the rostral, then running along 

 the canthus rostralis, continuing across the temporal region and bending 

 over the occipital region to complete a similar crescent on the other side; 

 two or possibly three indistinct rows of pale yellowish spots extending 

 along each side of the body. Throat whitish, obliquely striped along the 

 sides with dark brown, ripple-like marks which extend over the labials ; 

 chin spotted in the mid region with pale brown; belly dark brown. 

 Posterior side of thighs dark brown with large whitish spots. 



Dimensions (in millimeters). — Snout to ear opening, 7.6; width of 

 head, 4.95; snout to vent, 30.8; fore limb, 8.2; hind limb, 11.4. 



Remarks. — It is interesting to find in this collection from Costa Rica a 

 new species of lizard belonging to a genus so recently described as Lath- 

 rogecko (cf. Ruthven, Occ. Papers, Mus. Zool., University of Michigan, 

 21, February 10, 1916). The almost simultaneous discovery of two species 

 of a new genus in such separated regions as Colombia and Costa Rica is 

 an excellent example of the fortuitous nature of most herpetological col- 

 lecting. 



The species described above may be easily distinguished from Lathro- 

 gecko sanctae-martae Ruthven by the characters given in the diagnosis or 

 again by the different color. 



The preparation of this note would not have been possible had it not 

 been for the kindness of Dr. Thomas Barbour. 



