86 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



outer surface of the tibia; a narrow dorso-lateral glandular fold, and 

 a few elongate glands on the sides; a strong glandular fold from 

 posterior angle of eye over tympanum to shoulder; ventral disk 

 plainly marked by dermal folds. 



''Dimensions. — Tip of snout to vent, 36 mm.; tip of snout to pos- 

 terior edge of tympanum, 13 mm.; greatest width of head, 13 mm.; 

 foreleg from axilla, 19 mm.; hindleg from vent to heel, 26 mm.; hind- 

 leg from vent to tip of fourth toe, 49 mm. 



"Coloration (in alcohol). — Body dark bluish-gray above, becoming 

 lighter on the sides; the sharp rim on the snout white; the head dark 

 gray with a blackish bar between the eyes; a black band from eye 

 across tympanum to shoulder; arms and legs light with darker bands 

 and markings; a white line on the posterior femur; underside whitish, 

 the throat finely sprinkled with pale gray. 



"Remarks. — This frog is closely related to Leptodactylus albilabris 

 from Porto Rico. The snout is shorter and broader, and the pro- 

 jecting edge on the upper lip is far more pronounced. Then, too, the 

 hind legs are shorter, and the examination of the mouth reveals a 

 deeply incised tongue, while the tongue of L. albilabris is only slightly 

 nicked behind." 



Two additional individuals received from 4 miles west of Jovero 

 were taken in swampy forest land. In proportions and size they are 

 similar to the type ; their color pattern, however, is somewhat brighter. 

 While none of these frogs has the wide light dorsal stripe typical of 

 albilabris, there are a number of irregularly shaped dark patches 

 on the back, beginning with a large chevron between the eyes, its 

 ends extending halfway across the eyelids. The hindlegs show a 

 very brilliant pattern of irregular dark bars over a light ground, and 

 there is a narrow, somewhat broken, light stripe on the outer pos- 

 terior portion of the femur. The heavy glandular fold from the 

 lower border of the tympanum to the insertion of the arm is very 

 prominent and is light in color, in contrast to the dark skin that 

 surrounds it. 



A tadpole from Laguna collected in March 1923 is now provisionally 

 referred to this species. Its arms and legs are fully formed, and its 

 head shows that it is rapidly becoming a frog. Its tail is exceedingly 

 long, measuring 24 mm., while the head and body taken together meas- 

 ure only 15 mm. Evidently the absorption of the tail does not com- 

 mence until the limbs are fully functional. It is interesting to find 

 that Noble's 4 figure of the larva of Leptodactylus albilabris has almost 

 precisely the same proportion of tail and body, although it is much 

 less advanced and has no limb buds. This proportion likewise agrees 

 with Stejneger's figure 8 of the tadpole of albilabris on which the hind 

 limbs have just appeared. 



* Ann. New York Acad. Sci., vol. 30, p. 87, 1927. « Rep. U. S. Nat. Mus. for 1902, p. 577, 1904. 



