12 
notanda. Cauda mediocris, et occlusa, paululim furcata. Pedes 
validi et robusti. Tursi in partem plumis induti. Hallux cum 
ungue, digito medio cum ungue longior. 
Gen. char.—Bill rather short, a little depressed at the base and 
straight; nostrils basal; wings long and powerful; primaries, par- ° 
ticularly the outer one, sickle-shaped; tail moderately large and 
slightly forked when closed ; feet strong and powerful ; tarsi partially 
clothed with feathers; hind-toe and nail longer than the middle toe 
and nail. 
Types, Trochilus cupripennis and T. Pamela. 
AGLHACTIS CAUMATONOTUS (n. sp.). Ag. vertice et collo fuscis, 
loris, pectore, et partibus inferioribus cinnamomeis ; guld fascia 
nigro-fuscd trans-notatd ; lateribus nigro-fusco tinctis ; plumarum 
penicillo elongato, et intense fusco, sed ad apicem fulvo, apud pectus 
imum; alis eneo-olivaceis ; caudd cinnamomed, superné a@neo- 
olivaced; dorso caudeque tectricibus purpurascenti-liliaceis si 
plume contra lucem modo contrario in conspectu sint. 
Crown of the head brown; lores, chest and under-surface cinna- 
mon-brown; throat crossed by a bar of blackish brown; flanks 
clouded with blackish brown; from the lower part of the chest 
springs a tuft of lengthened feathers, which are dark brown at the 
base and buff at the tip; wings bronzy olive; tail cinnamon-brown, 
except on the upper or exposed portion, which is rich bronzy olive ; 
back and upper tail-coverts shining purplish lilac, which colour is 
only seen when the feathers are looked at in the reverse direction. 
Total length 43 inches; bill 7; wing 34; tail 13; tarsi 3. 
Hab. Peru. 
Remark.—Closely allied to T. cupripennis. 
Genus HELIANGELUS. 
Gen. char.—Rostrum rectum, equé ac caput longum, cylindraceum, 
et ad basin aliquantd depressum. Plume frontales rostri basin 
non obtegentes. Ale mediocriter valide primaria externa falci- 
formi. Pedes mediocriter validi, halluce digitum intermedium 
zequante. Cauda mediocris, subrotundata. 
Gen. char.—Bill straight, about as long as the head, cylindrical, 
and slightly depressed at the base; feathers of the forehead not ad- 
vancing upon the bill; wings somewhat powerful, outer primary 
sickle-shaped ; feet moderately strong; hind-toe and nail the same 
length as the middle toe and nail; tail rather round in form and of 
medium size. 
All the species of this genus are from the Andes, and distinguished 
by the extreme lustre of the throat, which in most of the species is 
bounded below by a gorget of white or buff. 
Types, Trochilus Clarisse, Spencei, amethysticollis, and strophianus. 
HELIANGELUS MavorRs (n.sp.), Aves, t.ii. Hel. mas, fronte notam 
angustam intense flammeam ferente, vertice corporeque superiore 
eneo-viridibus ; guld intense flammed, lunuld lata fulvd, subti 
