318 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



LITHODYTES RICORDII Dum. & Bibr. 



Cope, Check-List N. Amer. Batr. EeptiL, 1875, p. 31. 



Mylodcs ricordii Dum. & Bibr., Erp. Gen., viir, p. 623 ; Boulenger, Cat. Batr. Sal. Brit. 

 Mus., 1682, p. 213. 



HeaCl as wide as or wider than tlie body, longer than broad ; the 

 lateral outlines curved ; the end of the muzzle abruptly truncated. 

 Ostia pharyugea oval. Vomerine teeth in two long curved series, 

 which commence behind and opposite to the external border of inner 

 uares; they are separated by a considerable space medially. Tongue 

 elongate oval, slightly nicked. A subgular vocal sack. Tymj^anum 

 half the size of the eye. Skin smooth above and below; sides rugose. 

 Heel reaching the orbit. Digital palettes small. Two metacarpal, two 

 metatarsal tubercles. Brachium longer than or equal to antebrachium. 



General color reddish-brov/n. The loreal region, a band between the 

 eyes, one above the tympanum, and some dorsal spots, darker. Beneath 

 light brownish. 



A single specimen from Key West, Florida, is in the National Mu- 

 seum. Its x)roper habitat is Cuba. 



SYRRHOPHUS Cope. 



Amer. Nat., 1878, p. 253; Proceed. Amer. Philosopli. Soc, 1876, p. 268. 



Sternum a cartilaginous plate, notched; digits free; vomerine teeth 

 none; ear well developed; nasal bones in contact, forming a solid roof 

 over the ethmoid cartilage. Pupil horizontal. 



This genus is simply Lithodytes without vomerine teeth. In the 

 former genus the nasals and ethmoid have the structure seen in Elosia. 

 Four species are known, three of which are Mexican in distribution. 

 They differ as follows from each other: 



Posterior limbs sliort, heel to tympannm; head wide; tympanum half orbit; rufous, 

 brown spotted S. marnoclin. 



Posterior limbs longer, heel to front of orbit; head wide, acanthus rostralis; lym- 

 pannm one-third orbit; brown, jiale spotted S. leprus. 



Posterior limbs longer, heel to front of orbit; head narrow, no cauthns rostralis; 

 tympanum one-third orbit; brown, dark spotted S. cystignathoides. 



Heel to front of orbit; head rather wide, flat; tympanum two-thirds eye-slit; sub- 

 digital tubercles large ; gray, with black spots S. verrucipes. 



SYRRHOPHUS MARNOCHII Cope. 



(Plate 71, fig. 34.) 



Amer. Nat., 1878, p. 253; Bull. U. S. Nat. Mus., 1880, p. 26. 



The typical specimen is as large as Ryla versicolor, and has a long 

 flat head and remarkably short hind legs. The muzzle is flat and 

 slightly depressed above, and projects a little beyond the edge of the 



