Zoological Society. 63 



Types, Trochilus helianthea and Bonapartii. 



Remark. — Plumage of the males rich and beautiful in the extreme. 



Hab. So far as is yet known, the Cordillerian Andes. 



Helianthea Eos (n. sp.), Aves, t. i. HeL mas, summo capite nigra, 

 apudfrontem notci metallice anreo-viridi ; collo anteriore etpectore 

 splendide aureo-viridibus ; gutture centrali notam intense ccet'uleam 

 ferente. 



Male. — Crown of the head black, with a shining spot of metallic 

 golden green on the forehead ; fore- part of the neck and chest lus- 

 trous golden green, the golden green predominating on the lower 

 part of the chest ; on the centre of the throat a patch of rich deep 

 blue ; abdomen ricli shining flame-colour ; back, wing and upper 

 tail- coverts bronzy orange ; tail cinnamon-brown, the apical half of 

 the two middle feathers and the tips of the remainder with a bronzy 

 lustre ; primaries chocolate-brown ; secondaries reddish buff, forming 

 a conspicuous mark on the wing. 



Female. — Similar in colour, but much less resplendent, and entirely 

 destitute of the spot of green on the forehead and the patch of blue 

 on the throat. 



Total length 5^ inches ; bill \\ ; wing 2 J ; tail 2 ; tarsi -^. 



Hab. The highlands of New Grenada and Venezuela. 



Remark. — Nearly allied to H. Bonapartii, 



Genus AoLiEACTis. 



Gen. char. — Rostrum sub-breve, paululam apud basin depressum, 

 rectum. Nares basales. Alee elongatse, validse ; remigibus pri- 

 mariis falciformibus hac forma praecipue apud primam pennam 

 notanda. Cauda mediocris, et occlusa, paululum furcata. Pedes 

 validi et robusti. Tarsi 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 M'hen 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, 



Agl^actis caumatonotus (n. sp.). Ag.vertice et collo f us cis, 

 loris, pectore, et partibus inferioribus cinnamomeis ; guld fascia 

 nigro-fuscd trans-notatd ; lateribus nigro-fusco tinctis ; plumarum 

 penicillo elongato, et intense fusco, sed ad apicemfulvo, apud pectus 

 imum ; alls ceneo-olivaceis ; caudd cinnamomed, super ne cEneo- 

 olivaced; dor so caudaque tectricibus purpurascenti-liliaceis si 

 plumce contra lucem modo contrario in conspectu sint. 

 Crown of the head brown ; lores, chest and urider-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 ; 



