219 



DOWNY TRIDACTYLIA. 

 (Tridactylia hirsuta.) 



Tr. albo nigroque varia. 



Tridactylia varied with black and white. 



Picus hirsutus. Vieil. Ois. de UAmer. Sept. 2. 68. 



Picus tridactylis. Lin. Syst. Nat. 1. 177. 21. — Lin. Faun. 



Suec. 103.— Gmel. Syst. Nat. 1. 43Q.—Phil. Trans. 62. 388. — 



Lath. lnd. Orn, 1. 243. 56. 

 Three-toed Woodpecker. Edw. 114. — Pen. Arct. Zool. 2. 168. 



— Lath. Gen. Syn. 2. 600. 57. — Lath. Syn. Sup. 112. 

 Le Pic a pieds vetus. Vieil. Ois. de UAmer* Sept. 2. 68. 124. 



In length eight inches and a half : beak an inch 

 long, and broad at the base, the upper mandible 

 dusky, the under one white ; tips of each dusky : 

 crown of the head bright yellow ; sides of the 

 head, in front of, and beneath the eye, spotted 

 •with black and white ; with a white streak behind 

 the eye : middle of the back white : upper parts 

 of the body and wings black : wing-coverts and 

 quills slightly spotted with white : chin, throat, and 

 breast, white: belly striated transversely with black 

 and white : tail consisting of twelve feathers, the 

 two middle of which are black, spotted with white 

 on the inner webs ; all the rest, but the most exte- 

 rior one, which is white, and buff-coloured on the 

 outer web, are black, with orange-buff tips : legs 

 with only three toes, placed two before and one 

 behind. This bird varies both in size and mark- 

 ings, being sometimes found near ten inches in 

 length, with the sides of the belly transversely 



