Vol. 34, pp. 143-146 August 17, 1921 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW CENTRAL AMERICAN SALAMANDERS. 

 BY EMMETT REID DUNN. 



During the preparation of a general Revision of the Free- 

 tongued Salamanders, now completed but the appearance of 

 which will probably be delayed, I studied most of the material 

 accumulated in the various American Museums. Besides this, 

 I spent a summer in the field in Costa Rica. One of these new 

 species, which it seems advisable to place on record now, was 

 taken during that journey, the other I found in material loaned 

 by the Field Museum of Chicago. For the opportunity to 

 examine their interesting series of urodeles and to characterize 

 this new form, I am deeply indebted to the authorities of that 

 institution who have likewise consented to the retention of para- 

 types by the Museum of Comparative Zoology. 



Oedipus rex, sp. nov. 



Diagnosis. — A small Oedipus with toes scarcely webbed, inner not 

 rudimentary, nostrils small in adult, teeth on maxilla, vomerine series of 9 

 teeth extending beyond nares, 3-4 costal folds between appressed toes. 



Range. — Known from type locality only. 



Description.. — Field Museum No. 1814, adult male (type). Sierra Santa 

 Elena (near Tecpam), Guatemala (alt. 9,500 feet). 12 costal grooves; 2 

 costal folds between appressed toes; head width 5}i in length from snout 

 to vent; head length 3^ in length of body; head a blunt oval; eye longer 

 than its distance from tip of snout; snout swollen; a tubercle below nostrils; 

 outline of upper jaw slightly concave as seen from side; angle of jaw back 

 of hind angle of eye; both eyelids fitting under a fold of skin behind; a 

 groove from hind angle of eye to gular fold ; a branch from this down behind 

 angle of jaw and across throat. Limbs well developed; fingers 3, 2, 4, 1 

 in order of length, not much flattened, webbed at base; toes not much 

 flattened, 3, 4, 2, 5, 1 in order of length, webbed at base and between 3 and 4 

 to next to last joint. Tail longer than head and body, constricted off at 

 base, circular in cross section; anal lips lined with papillae. 



Vomerine series not continuous with parasphenoids, about 9 teeth in series, 

 28— Pkoc. Biol. Soc. Wash.. Vol. 34, 1921. (143) 



