114 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



was used by Cope as a basis for generic discrimination of Lithodyies 

 and Hylodes. 



The type of Hylodes plicatus (B.M. No. 1901. 12. 19. 38) is here 

 identified as an immature individual of Eleutherodadylus rhodopis. 

 When direct comparisons were made between the types of H. plicatus 

 and H. sallaei, it was observed that the existing differences are too 

 sUght to have any taxonomic significance. For purposes of compar- 

 ison, the following notes on the type of H. plicatus are here recorded : 

 Head-and-body length, 19.8 mm.; transverse diameter of tympanum, 

 1.8 mm.; transverse diameter of eye, 2.8 mm.; anterior edge of eye 

 to nostril, 2.2 mm.; the hind hmb being carried forward along the 

 body, the tibio-tarsal joint reaches to end of snout; a long narrow 

 tarsal fold; inner metatarsal tubercle large and elongate, outer quite 

 small and conical; minute supernumerary tubercles on plantar surface 

 of foot; apical disks not very large; canthus rostralis fairly sharp; 

 vomerine teeth in two small widely separated clusters far behind, and 

 well within level of, the choanae; a vertebral linear dermal ridge from 

 snout to vent; a pair of medially converging dorsal dermal ridges that 

 inclose an hourglass-shaped area; skin of abdomen apparently areolate; 

 a black streak with light upper margin from nostril to eye and from 

 posterior edge of eye backward above tympanum, and downward 

 behind to above its lower edge; faint transverse dark bars on upper 

 surfaces of thigh and tibia. 



Some variation in the development of the tarsal fold may be 

 expected. Four of the specimens referred to this species have a 

 distinct tarsal fold, three have a low crested tubercle 2 or 3 mm. above 

 the base of the inner metatarsal tubercle, but the connecting tarsal 

 ridge is barely discernible, and on one the tarsal fold seems to be absent. 

 Exceedingly fine medially converging dorsal dermal folds are generally 

 present. Similarly the short black glandular ridges in the mid- 

 dorsal region are present in some and absent in others. With the 

 exception of the vomerine teeth, which are normally behind the 

 level of the choanae, no constant character that will invariably dis- 

 tinguish this species is apparent in the series studied. 



In life this little frog may be dark brown, reddish yellow, or 

 green, depending to some extent upon the surroundings. The ventral 

 surface of the tarsus and of the foot is either dark brown or black. 

 On the forearm there is either a dark-brown spot or a transverse 

 dark-brown bar. A dark-brown or black stripe with a light-colored 

 or white edge extends along the canthus rostralis from snout to eye; 

 beginning again at posterior margin of eye it extends backward above 

 the tympanum and along the lateral line for 6 or 8 mm,, or else 

 curves downward behind the tympanum. 



