64 Zoological Society. 



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 A^ inches ; bill J ; wing ^^ ; tail If ; tarsi |. 



Hub. Peru. 



Remark. — Closely allied to T. cupripennis. 



Genus Heliangelus. 

 Gen. char. — Rostrum rectum, ceque ac caput longum, cjdindraceum, 



et ad basin aliquanto depressum. Pluma frontales rostri basin 



non obtegentes. Aim mediocriter validse primaria externa falci- 



formi. Pedes mediocriter validi, halluce digitum intermedium 



sequante. 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 mavors (n. sp.), Aves, t. ii. Hel. mas, ft^onte notam 



angustam intense flammeani ferente, vertice corporeque superiore 



ceneo-viridibus ; guld intense flammed, lunuld lata fuhd, subtus 



circumscripta, abdomine intensius fulvo, lateribus viridi lavatis ; 



crisso griseo-fulvo ; alis purpurascenti-fuscis ; caudle rectricibus 



intermediis duabus ceneo-viridibus reliquis (sneo-fuscis, externis 



duabus ad apicem obscure albis ; tarsis intense fuscis ; rostra 



nigro-fusco. 



Male. — Crown of the head and all the upper surface bronzy green, 



except the forehead, on which is a narrow mark of deep fiery red ; 



throat deep fiery red, bounded below by a broad crescent- shaped mark 



of bulF, which colour, but of a somewhat deeper tint, pervades the 



whole of the abdomen, except the flanks, which are washed with 



green ; under tail-coverts greyish buff; wings purplish brown; two 



middle tail-feathers bronzy green, the remainder bronzy brown, the 



two outer ones on each side obscurely tipped with white ; tarsi dark 



brown ; bill blackish brown. 



Total length 3| inches ; bill | ; wing 2^ ; tail If ; tarsi \. 

 Hab. The Cordilleras of Venezuela and New Grenada. 



Genus Thalurania. 



Gen. char. — Rostrum capite longius, deorsiim curvatum, et paululiim 

 apud basin depressum. AIcb breves, debiles. Cauda mediocris, 

 furcata. Tarsi plumis induti, parvis, moUibus. Hallux cum ungue, 

 digito intermedio cum ungue brevior. 

 Gen. char. — Bill longer than the head, curved downwards, and 



rather depressed at the base ; wings short and feeble ; tail moderately 



large and forked ; tarsi clothed with feathers, small and delicate ; 



hind-toe and nail shorter than the middle toe and nail. 



