ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 14 7 



109. Catostoma dolichocephalxjm, Cope ; Colobognathus dolichocepJiala, Coi->e, Proceed. Acad. 



Philada. 1871, p. 211. 



Scales in thirteen longitudinal series, carinate to the urosteges on the tail, to 

 the first row of scales on the posterior, and to the second row on the anterior part 

 of the body. Head elongate conic, scarcely distinct from the neck. Internasals 

 very small, prefrontals very long. Frontal wide, openly angulate in front, with 

 superciliary margins distinct from the parietal ; latter plates well developed. 

 Superior labials six, second bounding nasal and loreal; third a little, fourth largely 

 in the eye, fifth longer than high, in contact with parietal. One temporal above sixth 

 labial, which is higher than long. Inferior labials six, second and third minute, 

 fourth long and narrow. Postgeneials small, separated by a scutum. Oculars 0-1, 

 Kostral elevated, not separating internasals. Tail slender, 5.75 times in the total 

 length. Gastrosteges 131, anal 1, urosteges 39. Color of body above and entire 

 tail, black, a series of large distant red spots on each side, which often meet above, 

 forming half-rings. These disappear on tail and neck. Below red, lower lip and 

 chin black. Length 12-14 inches. 



San Jose, Costa E-ica. • Dr. Van Patten. 



This species differs from the C. nasale. Cope (Proceed. Academy, 1868, p. 131), 

 in the fewer scale-rows (the latter has seventeen), the coloration, etc. 



110. Catostoma BRACHYCEPHALUM, Cope; (7oZo6og'nai57itts6/'ac%cep7!aZa,Cope,loc.cit.l871,p.211. 

 Scales in fifteen longitudinal rows, smooth except a faint trace of carination 



near the posterior part of the body. Head flat, rather wide behind and distinct 

 from neck. Postgeneials small, separated by a scale. Rostral moderate, inter- 

 nasals not minute, prefrontals nearly as broad as long. Frontal broad, convex in 

 front, superciliary and parietal sutures nearly continuous. Oculars 0-1. Superior 

 labials six, two behind orbit, sixth longer than high, separated by one temporal ; 

 fifth longer than high, bounding parietal ; third and chiefly fourth in eye. Lower 

 labials seven; geneials short, wide. Gastrosteges 124, anal 1, urosteges 38. 



Color of body above and entire tail, black; gastrosteges reddish, brown mar- 

 gined. A yellowish or orange collar crosses behind the parietal plates and a band 

 of the same color extends from the side of the neck to the tail on the second and 

 third rows in front and third to fifth behind. This band is composed of two rows 

 of alternating narrow spots, which are not always perfectly united. 



Total length eight inches, the tail one-sixth of the total. 



The species just described agree with the C. nasale, the C. semidoliatum, and the 

 Colobognathus hoffmannii, in having the first labial behind the eye in contact with 

 the parietal shield. They are intermediate in the structure of the jaws, between 



