144 Proceedings of the Biological Society of Washington. 



beginning outside of nares, curving in and back, separated from its fellow 

 by a little more than width of the very small nares, and from parasphenoids 

 by nearly their own length, — latter in two patches beginning at last third of 

 eye sockets. Two premaxillary fangs. 



Color. — Pinkish gray dorsally and on ujjpcr surfaces of limbs and tail, 

 shading into gray in sides of body and tail, this somewhat marbled with 

 white, beneath light gray, white marbling on throat, light marbling on upper 

 surface of snout. 



Total length 89, head 10, body 33, tail 46. 



Variation. — A female, same data, differs in having 13 costal grooves and 

 3 costal folds between the appressed toes, head width 6 in distance from 

 tip of snout to vent, snout less swollen, anal lips smooth, tail longer than 

 head and body, 9 teeth in vomerine series which are separated from para- 

 spenoids by half their length. Color darker, lightest on throat, darkest on 

 mid-dorsal, but rather uniform gray all over. 



Total length 90, head 10, body 34, tail 46. A small specimen is similnr 

 to the male but has nostrils with greater diameter than the largest specimen. 



Total length 22, head 4, body 1.5, tail 7.5. Those described are the 

 maximum and minimum sizes seen. 



Habits. — The types were taken from under logs. 



Remarks. — This form is not any of those hitherto described from Guate- 

 mala. Its nearest relations are with sulcatus from Mexico. 



Specimens seen 11, all from type locality. 



Oedipina alfaroi, sp. nov. 



Diagnosis. — Similar to Oedipina uniformis in form, but no teeth on 

 maxilla, head pointed instead of rounded, eye smaller; dark brown above, 

 greyish below, instead of black above and below, as in the preceding species. 



Range. — Known only from type locality. 



Description. — Type M.C.Z. 6938, adult female, Zent, Costa Rica. 20 

 costal grooves; 14 costal folds between appressed toes; head width 12 in 

 length from snout to vent; head length 7 in length of body; eye shorter 

 than its distance from the nostril; head a pointed oval from above; snout 

 not swollen; outline of upper jaw straight 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 eye to gular fold; a groove from this down behind angle of jaw; 

 limbs weak; fingers 3, 2, 4, 1 in order of length, united to tips; toes 3, 4, 2, 5, 

 1 in order of length, united to tip. Tail imperfect, not constricted at base, 

 circular in crossection; anal lips smooth. 



Vomerine teeth about 9 in series, beginning behind outer edge of nares, 

 curving in and back, separated from its fellow by width of the large nares, 

 and from the parasphenoids by the same distance. Latter in a single 

 patch beginning opposite anterior fourth of eye socket. No teeth on 

 maxilla, one premaxillary tooth not piercing lip. Teeth on lower jaw 

 confined to front half, normal in form and number. Color purplish brown 

 above, light grayish below, a white spot behind insertion of leg. 



Total length 104, head 7.5, body 53, tail 43.5. 



