80 Proceedings of the Biological Society of Washington. 



it. It is evidently closely allied to Oreopeleia leucometopius Chapman 

 from Santo Domingo and apparently was a Porto Rican representative of 

 the Oreopeleia caniceps-leucometopius group of species. The only other 

 species with which larva might be confused is Oreopeleia martinica from 

 the Lesser Antilles, a species that on the average has a distinctly shorter 

 tarsus according to Mr. Ridgway 1 (from 29.5 to 36.5 mm. irrespective of 

 sex) . Exceptional individuals of martinica have the tarsus nearly as long 

 as in 0. larva. These, however, may be readily distinguished from larva 

 by the more slender shaft of the metatarsus, a character in which mar- 

 tinica agrees with the smaller Oreopeleia montana. At least ten or a dozen 

 individuals of larva are represented in the material at hand so that it 

 would appear that at one time this Quail-Dove had been a common species. 



Tyto cavatica, sp. nov. 



Characters. — Metatarsus similar to that of Tyto glaucops (Kaup) from 

 Santo Domingo, but with internal head of talon larger and much longer, 

 the lower margin more elongated; tubercle for insertion of tibialis anticus 

 tendon heavier. 



Description. — Type, Cat. No. 4924, Dept. Vert. Pal., American Museum 

 Nat. Hist., proximal three-fourths of a left metatarsus from cave on the 

 property of Don Gervacio TorafLo, near Utuado, Porto Rico, collected 

 July 2, 1916, by H. E. Anthony. 



Metatarsus with base supporting inner head of talon long, sloping gradu- 

 ally below and truncate in front (crest of talon missing in type) ; posterior 

 semi-lunar groove deep and narrow; anterior semi-lunar groove shallow; 

 inner glenoid facet moderately impressed and concave ; outer glenoid facet 

 smooth without marked depression; entire posterior face of bone deeply 

 grooved; ridge bearing inner head of talon swung over slightly toward 

 center from inner margin, with a marked depression on inner face of the 

 crest; outer side of metatarsus flattened, with angular margins, becoming 

 narrower in a curving line toward head of bone, and expanding again 

 slightly to support outer glenoid surface; anterior surface of bone excavated 

 proximally in an elongate, roughly triangular groove; tubercle for inser- 

 tion of tibialis anticus long and strong, extending well toward head of 

 bone; lower end of bone with a distinct forward flexure; no osseous loop 

 for extensor digitorum communis tendon. 



Measurements. — (Of type.) Lateral diameter of head across articular 

 surface 10 mm.; lateral diameter of shaft near center 4 mm.; length of 

 base of inner head of talon 8.7 mm. 



Range. — Known only from cave on property of Don Gervacio Torafio, 

 near Utuado, Porto Rico. (Extinct.) 



Remarks. — This species is known from the proximal ends of right and 

 left metatarsi and parts of two tibio-tarsi all taken in one cave. Ap- 

 parently two individuals are represented as otherwise the range in pro- 



» Bull. 50, U. S. Nat. Mus., Vol. 7, 1916, p. 477. 



