2 oe IN TRODUCTTON. xl vill ; ; oe . -e correctly placed than the subdivision ; but at present I do not know of any genus in which the bird could be more c y ple one to which I have assigned it. Genus Arnantocuroa, Gould. (“Agavros, obscurus, et xpéa, color.) Generic characters. i © 5 . ° oO: f Male.— Bill stout, rather longer than the head, and slightly arched ; wings broad and moderately long; tai square and moderately large ; tarsi clothed ; hind toe rather short. Sexes alike in the sombre colouring of the plumage. Vol: 1. Pl. 62. APHANTOCHROA CIRRHOCHLORIS Campylopterus campylostylus, Burm. Th. Bras. ii. p. 329. 2. a Aphantochroa cirrochloris, Reich. Aufz.der Col.p.15; Id. Troch. Enum. p.12; Cab. et Hein. Mus. Hein. Theil iii.p.14. Habitat. Brazil. if, x 63. APHANTOCHROA GULARIS, Gould : : : : ; : : : ‘ : Vol. IT. Pl. 55. Habitat. Banks of the Napo. Genus Do.erisca, 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. JI wish it to be understood that I do not include in this genus the albicollis 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. fallaa, differs in some minor details, and I shall therefore provision- ally propose for it the specific name of cervina. 64. DoLerRisca FALLAX. Leucippus fallax : : : : : : ; : : ; : : Vol. IE, Pl. 56: Dolerisca fallax, Cab. et Hein. Mus. Hein. Theil iii. p- 6. Habitat. Venezuela. 65. DoLerRisca ceRvina, Gould. Habitat. Unknown. TMhia AKT had Vo “yer 7 . his new species is larger than the D. fallax in all its admeasurements the tips of the outer tail-feathers. , and has a less amount of white on In D. 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. cer vina is reddish brown, while in D. fallax the upper one is black. The habitat of the latter is well known to be V enezuela, but that of the former has yet to be ascertained. Genus Urocuroa Gould. (Ovpa, cauda, et pda, color.) Generic characters. Male.— Bill lengthened and straight, or slightly arched ; wings moderately long and pointed ; tail square ; tarsi . 8 @ Led. 5 ) Square ; tar: 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. Urocuroa Bovucurrt ; ‘ . ; : ; Vole Rie aye Habitat. Nanegal, in Ecuador. tn