1855.] 325 



species and G. calvus probably form a distinct subgenus, but tbe name given to it 

 by the Prince of Canino is not appropriate so far as relates to our present bird. 



3. Diceum Rushi.e, nobis. Mrs. Rush's Warbler. 



Form. Very small, bill slender, curved, first quill spurious, fourth and fifth 

 longest and nearly equal, tail short, legs and feet rather stout. Plumage of entire 

 head and breast scule-like and rough to the touch. 



Dvmtnsions. Total length (of skin) male, 3 inches, wing If, tail 1 inch. Female 

 slightlv smaller. 



Colors. Every feather of the head above, neck, back, throat and breast with 

 a central line of brown (sienna) and edged with ashy white, tbe brown darkest 

 and predominating on the head, and palest but much predominating and giving 

 the prevailing color on the back ; the ashy white predominating on the throat 

 and breast. Abdomen, rump, and tail coverts above and below pale yellow, 

 tinged with greenish. Quills brown, edged with white on their inner webs, tail 

 dark brown, nearly black. Bill with the upper mandible black, under mandible 

 white at base and tipped with black, tarsi and toes light colored. Inferior coverts 

 of the wirgs white. 



Bab. Moonda river, Western Africa. Discovered bvMr. P. B. Du Chaillu. 



Obs. This is the most remarkable species in the present collection, and of its 

 generic relations I am by no means certain, though it appears to be most nearly 

 allied te the group in which it is at present placed. In its colors, however, it is 

 quite different from any other known species of this genus, and the scale-like 

 feathers of the head and breast are quite peculiar. 



This bird is dedicated to the lady of James Rush, M.D., of Philadelphia, who, 

 most ably seconding her distinguished husband in an enlightened encouragement 

 of men devoted to the sciences and to the arts, has exerted an influence in the 

 highest degree beneficial to their progress, and promotive of the true interests of 

 society. 



4. ^Egithalus flayifro.ns, nobis. 



Form. Bill straight, pointed, rather long, first quill spurious, third and fourth 

 longest and very nearly equal, tail rather short, legs long, rather robust. 



Dimensions. Male, total length (of skin) 3J inches, wing 2^, tail l\ inches. 



Colors. Forehead bright yellow, entire plumage of the upper parts olive green 

 tinged with yellow, lightest on the rump, quills and tail dark brown, the feathers 

 of both edged with yellowish green on their outer webs. Entire under parts 

 pale yellow, tinged with green. Inferior wing coverts white, bill and feet light 

 horn color. 



Hub. Moonda river, Western Africa. Discovered by Mr. P. B. Du Chaillu. 



Obs. Of the same form and about the size of JE. Smithi, but entirely different 

 in color, nor does it apparently intimately resemble any known species. 



5. Syncopta tincta, nobis. 



Form. Bill rather long, first quill spurious, fourth and fifth longest and very 

 nearly equal, tail moderate or rather short, legs long. Feathers of the back long 

 and hair-like. 



Dimensions. Male, (of skin) total length 4 inches, wing 2J, tail If inches. 



Colors. Head above, back and rump light cinereous, scapulars, wing coverts, 

 and outer edges of quills (especially the secondaries) yellowish green. Quills 

 and tail light hair brown. Throat, breast and sides light ashy, abdomen white, 

 tibiae ochre yellow, tinged with green. Edge of wings at the shoulders yellow, 

 inferior coverts white. Bill dark, tarsi and toes light colored. 



Bab. Moonda river, Western Africa. Discovered by Mr. P. B. Du Chaillu. 



Obs. The affinities of this genus are to the TimalincB. The present species is 

 rather smaller than Syncopta brevicaudata, but there is no considerable specific 

 similarity. It is in both the collections of Mr. Du Chaillu and Dr. MacDowell, 

 obtained by the latter on St. Paul's river. 



6. Sylvia prasixa, nobis. (Genus Chloropeta ?) 



Form. Bill rather strong, upper mandible somewhat curved, wing rather long, 



