1)2 



BULLETIN 34, UNITED STATES NATIONAL MUSEUM 



wards, nearly coutiuuoas medially. Tbe paraspbeuoid teeth stand on 

 two narrow plates, which are well separated, especially behind, and are 

 shortened ; anteriorly they only reach to near the middle of the orbits. 

 The mandibular teeth present pecularities in the male, by which it may 

 be readily distinguished from the female. In a large number of speci- 

 mens the oral commissure is but little undulate, and the mandibular 

 teeth though longer medially, are continued to near the basis of the 

 coronoid process. The males exhibit a strongly flexuous commissure, 

 and the alveolar margin of the mandible is deeply concave below tbe 

 front of the orbit, and is edentulous. The distal portion is abruptly 

 convex and is armed with long teeth. Tbe margin is sligbtl^^ concave 

 anterior to this point, and finally rises again at the symphysis, which is 

 prominent and protected externally by a pad of crypts as in D. fuscus. 

 The structure of the males is in the mandibular dentition quite that 

 of the genus Autodax ; the A. ferreus presenting the characters but 

 little more strongly. ¥o such sexual difference can bo found in the 

 D.ftisca, though the commissure only may be sometimes more flexu- 

 ous in males. The jaws and dentition in the D. nigra do not differ in 

 tbe two sexes. I have observed that two of the many males of Z>. ochro- 

 phfca possess the female denition. The tongue in D, ochrophcea is an 

 elongate oval, considerably free behind. 



Tbe color of females is a bright brownish yellow, fading to dirty white 

 below, with a dark brown shade on each side from the eye to tbe end 

 of tbe tail, which is daikest above and gives the dorsal space tbe char- 

 acter of a band. There is an irregular series of brown dots along the 

 vertebral line. Males are rather larger and usually darker in color; 

 tiins the dorsal band Is brownish, tbe lateral band blackish, and tbe 

 dorsal spots more distinct. In most specimens of both sexes there is a 

 light band from the eye to the rictus oris, and the belly is always im- 

 maculate ; tbe gular region nearly always. The testes and v. is defeiens 

 are covered with black pigment ; no pigment on the peritonaeum of the 

 female. 



1 4 3 



Fig. 47. Dcsmognathus ochrophcea. No. 6891. 



Mcadville, Pa 



2, cf ; 2a, ?. 



This species attains scarcely half the size of the D.fusca, as indicated 

 by the numerous females with develoj)ed eggs in our collections. As 

 the eggs are equal in size to those of I), fusca when roady to be dis- 

 charged, and as the species is only half the size of the same, the eggs 

 in the oviduct of a gravid female at one time are only half as iitimerou.«. 

 I have only found from G to 10 in D. ochropliwa^ in each oviduct, while 

 from 18 to 30 may be countrd on one side in D, fusca. 



