ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 129 



$3. Last labial united with two temporals. 

 First labial not reaching eye. S. goudottii. 



ASINEA. 



66. XlPHOSOMA ANNULATUM, Sp. DOV.* 



Scales in fifty-four longitudinal rows on the body, and in forty-two at two inches 

 behind the head. The top of the muzzle is covered with about fourteen small 

 shields, of which two, a little larger than the rest, separate the nasals and bound 

 the rostral. The latter plate is higher than wide, and has two long sutural borders 

 on each side, and a short one on each side of the apex. Top of head covered 

 with small smooth scales, of which twelve may be counted between the eyes, with 

 superciliaries not distinguishable. The superior labial shields number fourteen, 

 and are all pitted ; only the posterior two-thirds of the inferior labials are pitted. 

 Three loreal plates and one preocular ; one series of scales separate the orbit from 

 the labials, and bound the labial pits above. Gastrosteges 260 ; anal entire ; 

 urosteges 82. 



Ash-colored, with darker ash-colored oval figures on each side. These are 

 simply rings vertically placed, and they are occasionally connected on the median 

 line above, where their color is more distinct. Head and lower surfaces uniform. 



M. 

 Total length 755 



Length of tail '. 132 



" to rictus of mouth ........ .079 



This species exhibits the lip-pits and scutellation of the X. caninum, with the 

 squamation and colors of the X. hortulanum. 



* XlPHOSOMA RUSCHENBERGERII, sp. nOV. 



Scales in forty-seven rows on the body, and thirty-five rows two inches posterior to the head. 

 Rostral plate higher than long. Superior labials all strongly pitted to the side of the rostral 

 above, and on the posterior half below. The pits below the orbit are not separated from the 

 latter by the projection of the row of scales above the labials, but these are enclosed in the pits 

 which are thus continuous with the orbit. Top of the head covered with large scuta, the largest 

 each subtriangular and separating the nasals. These are followed by a series of scuta above the 

 canthus rostralis, which terminate in two or three large superciliary plates. -The latter are sepa- 

 rated by smaller scuta, the whole number between the orbits being in nine longitudinal rows. 

 Only two loreals, and one preocular. Yellowish-brown, with occasional yellow scales above. 

 Below bright yellow, on each side of the gastrosteges a series of brown spots. Tail black with 

 yellow spots. Size of the X caninum. 



This species resembles the X hortulanum more than the other species, but differs in the larger 

 scales, large plates of the head, the pitted upper lips, and the coloration. There are fourteen 

 rows of scales between the eyes in that species. 



Obtained at Panama by Dr. W. S. W. Ruschenberger, President of the Academy, to whom 

 the species is, with much pleasure, dedicated. 

 33 



