xlviii INTRODUCTION. 



subdivision ; but at pi'esent I do not know of any genus in which the bird could be more correctly placed than the 

 one to which I have assigned it. 



Genus Aphantochroa, Gould. 



Q'A(papT09, obscurus, et xp^a, color.) 

 Generic characters. 



Male. — Bill stout, rather longer than the head, and slightly arched ; wings broad and moderately long ; tail 



square and moderately large ; tarsi clothed ; hind toe rather short. 



Sexes alike in the sombre colouring of the plumage. 



62. Aphantochroa cirrhochloris ........... Vol. II. PI. 54. 



Campylopterus campylostylus, Burm. Th. Bras. ii. p. 329. 2. 



Apha7itochroacirrochloris,^e\c\i,A.v£zAtrCo\,i^Ab\ Id. Troch. Enum.p.I2; Cab.et Hein.Mus.I-Iein.Theiliii.p.l4. 



Habitat, Brazil. 



63. Aphantochroa gularis, Gould -.....,..,. Vol. II. PI. 55. 

 Habitat. Banks of the Napo, 



Genus Dolerisca, Cad, 



The typic species of this form is the Trochilus fallax of M. Bourcier, a bird distinguished by its tawny- coloured 

 breast, and by the white tippings of its outer tail-feathers. I wish it to be understood that I do not include in this 

 genus the alUcollis or the chionogaster, which have been inadvertently figured as pertaining to it. At the same time 

 were I to state that the genus is confined to a single species, I believe that I should be leading ornithologists into 

 error ; for I have a specimen which, I think, will prove to belong to a second. The example in question, although 

 bearing all the general characteristics of the D, fallax, difi^ers in some minor details, and I shall therefore provision- 

 ally propose for it the specific name of cervina. 



64. DOLERISCA FALLAX. 



Leucippus fallax Vol. II. PI. 56. 



Dolerisca fallax. Cab. et Hein. Mus. Hein. Theil iii. p. 6. 

 Habitat. Venezuela. 



65. DOLERISCA CERVINA, Gould, 



Habitat, Unknown. 



This new species is larger than the D. fallax in all its admeasurements, and has a less amount of white on 

 the tips of the outer tail-feathers. In Z>. fallax these greyish- white tippings occupy both webs of the apical portion 

 of each of the three outer feathers, while in the cervina the inner webs only are thus marked ; these marks are 

 about three-eighths of an inch long on the outer feather, a quarter of an inch on the next, and but a little more 

 than an eighth on the third ; the upper mandible in D. cervina is reddish brown, while in D. fallax the upper one is 

 black. The habitat of the latter is well known to be Venezuela, but that of the former has yet to be ascertained. 



Genus Urochroa Gould. 



(Ovpa, Cauda, et xpos color.) 

 Generic characters. 



Male.— Bill lengthened and straight, or slightly arched ; wings moderately long and pointed ; tail square ; tarsi 

 partly clothed ; hind toe as long as the middle toe ; nails short. 

 Female. — Unknown. 

 Of this remarkable form only one species is at present known. 



66. Urochroa Bougueri ... Tr i tt m r^ 



•''•••-.-* Vol. 11. Pi. 57. 



Habitat. Nanegal, in Ecuador. 



