Ifi. ncoiDEs. 281 



Apternus hirsutus (non Step],.), Fimch, Ahh. Nat. iii. p 61 m7'.i\ 

 -Ficus tridactjlus {non Lmn.), Adams, Ibis, l87,s p. ^-Sj '' 



Picoides tridactylus alascensis, Nelson, Auk, 1884 p 165 

 Picoides americanus alasceiisis, A. O. U. Check-U'st N. Amer B 

 p. 214, no. 401 a (1886) ; Itiihjiv. Man. N. Amer. B. p. 287 (1887)'. 



AduU male, luinter plumage. Eesembles P. americaims in haviuo- 

 the back barred with white, but the black interspaces are inter"- 

 rupted in the middle of the back by a line of white, caused by the 

 apical portion of the central feathers being uniform white- the 

 white stripe above the ear-coverts, which borders the occiput and 

 nape, and joins, on the hind neck, the corresponding stripe is more 

 dehned : the yellow on the crown golden ; the upper tail-coverts 

 are barred with white, as are likewise the tips of tlie scapulars- 

 the tips of the primaries are also white. Total length 8 inches' 

 culmeu 1-2, wing 4-G, tail 3, tarsus 0-82; toes (without claws )J 

 outer anterior 0-4, inner anterior 0-35, posterior 0-5 



Adult female. Differs from the adult male in wanting the yellow 

 crown, the whole of the top of the head being blue-black, the fore- 

 head spotted and the crown striped with greyish white Total 

 length 8 inches, culmen 1-U5, wing 4-55, tail 3, tarsus 0-8 

 ,./'"'!'«'"'•'•: Ifesemble the adult of their respective sexes, but 

 differ in having the central tail-feathers spotted more or less trans- 

 versely with white upon both webs. In the male the yellow on 

 the top x)f the head does not advance so far forward, and in the 

 female the foreliead and crown are spotted, rather than striped with 

 greyish white. ' ' 



In summer this species has much less Mhite upon the winox the 

 upper tail-coverts are not barred, and the upper series have at most 

 a few minute white spots ; the lateral tail-feathers are more or less 

 barred with black at the base ; there is a smaller amount of white 

 on the top of the head, and none, or merely a trace, on either the 

 wing-coverts or scapulars ; the barring on the sides of the ])odv 

 Hanks, and thighs is broader and blacker, and there is a less amount 

 of white on the under Ming-coverts and axillaries. 



Hah. Alaska, north of the mountains, and eastward throuo-h 

 Arctic British America to Hudson's Bay. ° 



a 6 imm. sk. N. Land Expedition. Capt. Back \V.^ 



b. 2 ad. sk. Fort Halkett, Dec. (J. Lock- Salvin-Godman Coll 



nart). 



c. c? ad. sk. Unalaklut, Alaska (£. W. ") 



Nvlson). I 



(/, V. 6 ad. ; /. 5 Xulato, Alaska, Mair-li (E 



"""• ®^- ^^'- A>&o«). Henshiw r„ll 



y,h.6^A.:i-L2 Fort Reliance, Oct., Dec. h fs-S] 

 ad. sk. (E. W. Nelson). ^ ^ 



>«. c? imm. .sk. Shaktolik, Alaska, Dec. ( 7r. | 



Nelson). i 



n. d ad. sk. Mackenzie Rher(Kemucott). Sclater Coll 



o. d ad. sk. Great Bear Lake. B R Ro.s Eso rp i 



"'?d.1k''-' '■■ ^ ^-^s-p-- B.R.Ro5lSt?:j: 



