1809.] ^"'^ [Cope. 



under surface above with an incomplete outlining of cross bars. Teeth 

 between nares. Proportions of limbs generally as in the common variety 

 of S. xsignatus; head equal foot beyond tarsus less the last phalange and 

 two-thirds the tibia; foot 1.5 head and body. Orbit equal muzzle to 

 beyond nares; belly immaculate, throat smooth. Heel nearly to nares. 

 Length head and body 15.25 lines. 



Habitat. Para Brazil. One specimen, No. 473 Mus. Comp. Zoology, 

 Cambridge, Mass. Pebas Equador, Prof. Orton. Named for my friend, 

 Prof. Harrison Allen, of the Pennsylvania University. 



Hyla pulchrilineata, Cope. 



Form that of H. a r b o r e a . Fingers free, toes webbed to the base of 

 the penultimate phalange. Dilatations well developed. Yomerine teeth 

 in a single transverse series opposite the posterior margin of the internal 

 nares ; the latter much larger than the ostia pharyngea. Tongue slightly 

 free behind. Canthus rostralis distinct, lores concave. Eyes large, prom- 

 inent ; membranum tympani one-fourth their size. The skin is smooth 

 above, and the areolae of the abdomen are unusually weakly developed. 

 No dermal appendages to the limbs or body. The extended hind limb 

 brings the heel to the front of the orbit. 



nun. 



Length total axial 38. 



" to eye not axial 58. 



" to posterior margin tympanum.. . 11.7 



' ' fore limb 22.8 



'■ hind limb 58.5 



•' foot 24.5 



'-' tarsus 12. 



Width at canthus oris 12.4 



Ground color above pale ashy brown. A strong citron yellow band 

 passes round the muzzle, below the tympanum, and along the side to the 

 groin. On the side it is wider, slightly undulating, and bordered above 

 and below with slate color, which forms a pale blotch below it on the 

 groin. A narrow unmargined, bright citron yellow line extends from 

 the end of the muzzle to the vent, medially ; and a similar one passes 

 above the canthus rostralis and orbits along a line equidistant between 

 the vertebral and lateral lines, joining the latter at the groin. The fem- 

 ora are finely yellow above and behind, and a yellow longitudinal line 

 marks the tibia on both the inner and outer sides. The pigment of the 

 metatarsus does not extend on the outer digit. 



This pretty and uniquely marked species was brought by William M. 

 Gabb, member of the Academy and Chief of the Geological Survey of the 

 Island of San Domingo, from the eastern part of that island. The thumb 

 can be opposed to the fingers as in the species formerly referred to Litoria.* 

 The sacral diapophyses are narrower than usual in the genus. The fronto- 



*Two species were described by Dumeril.as L. marniorata and L. punctata, from Australia. On 

 the union of these with Ilyla, I changed their names to H. thyposticta and H. dimolops respec- 

 tively (Journ. A. N- Sci., 1866, p.S5), as there were Hylae already described under those names. 



