BIRDS OF NORTH AND MIDDLE AMERICA, 501 



Southwestern Mexico, in States of Guerrero (mountains near Chil- 

 pancingo) and Oaxaca (15 miles west of Ouxaca City). 



Delattria pringlei Nelson, Auk, xiv, Jan., 1897, 51 (Oaxaca City, Oaxaca, s. w. 



Mexico; coll. U. S. Nat. Mus.). 

 [Caligena] pringlei Sharpe, Hand-list, ii, 1900, 122. 

 C[oeligena] henrica pringlei Hartert, Das Tierreich, Troch., 1900, 115 (monogr.). 



Genus OREOPYRA Gould. 



Oreopyraa Gould, Proc. Zool. Soc. Lond., 18G0, 312; Introd. Trochil., 1861, 141. 

 (Type, 0. leucaspis Gould= Trochil us ( ?) castaneoventris Gould.) 



Medium-sized Trochilidse (length about 90-110 mm.) closely related 

 to Lamimrnis and Cyanolaemus, but with relatively shorter bill, nasal 

 opercidum narrower and more concealed, and more feathered tarsi; 

 under parts not gray, and coloration more brilliant, the adult males 

 green, white, or green and white beneath, with pure white, brilliant 

 green, or violet throat-patcli, usually with forehead and crown glit- 

 tering green or blue, adult females with under parts light cinnamon- 

 rufous or white. 



Bill about as long as head, moderately slender, straight, terete; 

 culmen rounded except basally, where contracted into a narrow 

 ridge; tomia smooth; mandible with a lateral median groove. Nasal 

 operculum rather narrow, its outer edge straight or but slightly 

 convex basally, mostly hidden by frontal feathering, which extends 

 al)Out as far as anterior end of nostrils, forming a short point or antia 

 on each side of mesorhinium. Tarsus clothed with short feathers, 

 except posterior edge; inner toe very slightly shorter than middle 

 toe, the outer toe still shorter, the hallux about as long as outer toe. 

 Wing more than three times as long as culmen m adult males, about 

 tliree times as long in females, the outermost primary longest. Tail 

 about tliree-fifths as long as wing, rather deeply emarginate in adult 

 males, slightly double-rounded or truncate in females, the rectrices 

 moderately broad, rounded or subcuneate at tip. 



Coloration. — Above metallic green, bronze-green or bronze, the 

 upper tail-coverts sometimes dusk}"; tail plain gray, blackish passing 

 into gray on lateral rectrices, or dull bronzy with paler tip in adult 

 males (sometimes in females also), bronze-green with blackish tip or 

 subterminal band and j)ale gray tip to lateral rectrices m females of 

 some species. Adult males usually with forehead and crown glit- 

 tering green or blue, a throat-patch of metallic violet or pure white 

 or else throat spotted with bright metallic green, the remaining under 

 ])arts mostly wliite (0. hemileuca, 0. syhillse, and 0. viridipallens) or 

 metallic green (in other species). Adult females with under })arts 

 light cinnamon-rufous, or white (0. hemileuca, 0. syhillse, and 0. 

 viridipallens). 



(^"Opog, mons et nijp, ignis. (Gould.) 



