NEW SPECIES OF THE MOTACILLINJE. 



189 



stout, and nearly smooth ; the thumb, nearly equal to the inner fore toe and 

 sub-depressed : the nails acute. 



Wings, round-acuminate ; 5th longest : 1st and 2nd greatly, 3rd and 

 4th trivially, gradated : the tertials, short, firm and composed. 



Tail, 12, subelongate, firm, erigible, considerably gradated on the sides. 



Nape frequently furnished with a few slender hairs. 



The above character has been composed with special reference to the 

 two genera Tardus and Motacilla ; and upon the assumption that our 

 Genus be referred to the Motacilline Sub-family of the Sylviadce. 



'^st Species, new Docilis, nobis. 



Colour and Size. Head, neck and breast, with the body above and 

 the wings, blue glossed black : a broad central stripe throughout the whole 

 length of the wing : the body below and the 8 lateral tail feathers, pure 

 white : bill and legs, black : iris dusky brown : 8^ to 9 inches long by 

 11|^ wide, and to If oz. in weight : tarsus \-^: central toe W : hind 

 toe ^ : its nail ^ : tail 3^. 



Sexes alike. The young have the breast ruddy and the glossed black 

 parts of the upper plumage : at first, olive brown, then blackish, slaty and un- 

 glossed, including the breast : their feet are slaty, and their bill dusky brown. 



2/ifZ Species ? Motacilla variegata Auctorum. 



3rd Species? Turdus solitarius Auctorum. 



Genus Motacilla. Sub Getms, Enicurus, Tern. 



Species, new ; Schistaceus, nobis. 



Form, as in Maculatus, but somewhat less in size. 



Colour. Head, neck, back and flanks, dark slaty blue : cheeks, throat 

 and a very narrow band round the bill, jet black : a white frontal band 

 above the last from eye to eye : whole neck and body below, with the 

 rump and upper tail coverts, white : wings and tail precisely as in 

 Maculatus, save that the blanching of the alar quills at their bases is more 

 extended and reveals itself like a speculum on the primaries. Bill, legs, 

 and iris, as in 3Iaciilalus, and indeed in all the other species ; for I know 



Y 



