162 Oherholsei — A New Genus and Speeies of TrochilUlae. 



It is rather difficult to say with what genus this new bird shows closest 

 affinity, since if it should prove to be a female it possibly lacks the tail- 

 development of the male. From Cyanolesbla it differs in much shorter, less 

 deeply forked tail, presence of tibio-tarsal tufts, and rather more narrow, 

 abruptly, less sharply pointed bill. From Vestipedes {—Eriocnemis) it may 

 readily be distinguished by tlie more narrow tail-feathers, much less con- 

 spicuous development of the tibio-tarsal tufts, less extensively feathered 

 tarsus, and the greater extent of the frontal feathering on the base of the 

 maxilla. From Zodalia, which it seems most to resemble, it may be sepa- 

 rated by its relatively shorter, less deeply forked tail, with more sharply 

 pointed rectrices. slightly stouter bill, and the presence of well marked 

 tibio-tarsal tufts. 



Aeronympha prosantis sp. nov. 



Type.— From Colombia [Bogota]. No. 11,852, Field Columbian Museum 

 Adult, sex unknown. 



Description. — Plumage of the upper parts metalHc, but not glittering; 

 pileum and nape deep reddish violet, the feathersof the former with bUiish 

 green tips ; upi)er back, scapulars, and sides of neck deep bottle green, 

 merging gradually into the deep reddish violet of lower back, rump, and 

 upper tail-coverts; tail prune purple; wing-quills, greater and primary 

 coverts fuscous, with a prune purple sheen ; median and lesser coverts deep 

 reddish violet, those of the latter lying nearest the bend of the wing with 

 broad bottle green edgings; anteorbital region (hind part of lores) black, 

 the feathers with whitish bases; infraorbital stripe (continuous with lores) 

 anteriorly black, posteriorly dull greenish; a conspicuous spot of creamy 

 white just behind the eye; remainder of postocular region deep reddish 

 violet like the nape; a rather broad streak of tawny ochraceous from the 

 rictus to opposite the middle of the eye below the infraorbital stripe; rest 

 of clreeks dull metallic parrot green with narrow edgings of tawny; chin 

 reddish violet, the feathers with relatively large metallic grass green sub- 

 terminal erescentic bars, and narrow tawny margins; remainder of lower 

 parts metallic parrot green, the feathers of the medial portions and espe- 

 cially of all the lower abdomen edged with tawny; the lower tail-coverts 

 mostly tawny ochraceous with large central spots of green ; a tuft of slate 

 colored white tipped downy feathers on each side of the lower abdomen ; 

 tibio-tarsal tufts cream white; lining of wing deep reddish violet with con- 

 siderable metallic green anteriorly. Length of wing, 64 ; lateral tail-feathers, 

 47; central tail-feathers, 33.5; exposed culmen, 15.3; bill from rictus, 20 ; 

 tarsus, 6.5 ; middle toe, 5 ; middle claw, 3.5 mm. 



Unfortunately the only example of this hummingbird is without indica- 

 tion of sex, date, or further locality than " Colombia." It is, however, of 

 the well-known Bogota make, and came probably from that vicinity. It 

 has the appearance of being a female, but an adult. 



