274 i>icid.t:. 



with dull carmine. Dimensions: "Wing 140 mm., tail-feathers 

 88 mm., exposed culmen 34 mm., ext. ant. toe (Avithout claw) 

 18 mm." {SteJHcr/er) *, 



Hab. Japan, south-western portion of Main Island. 



16, PICOIDES. 



Type. 



Picoides, Laccp. Mem. tie I'lnstitate, Paris, iii. p. 509 



(IBOl) P. tridactylus. 



Tridactylia, Shmv, Gen. Zool. ix. p. 218 (1815) P. americanus. 



Apternus, Swains. Faun. Bor.-Amer. ii. p. 302 (18.j1). P. americanus. 

 Pipodes, Glog. Handb. Naturg. p. 198 (1842) P. tridactylus. 



Hanr/e. Northern and Central Europe ; Siljeiia; south into China : 

 Kamtschatka ; Alaska and Xorthern Jv^ortli America to the border 

 of the United States, and on the west along the liocky Mountain 

 region south into New Mexico. 



Kei/ to the Species t. 



A. Back white, broadly striped with black. 



a'. Lateral tail-feathers almost entirely barred 

 with black. 

 a". Sides of the chest broadly striped, the 



sides of the body broadly barred with [p. 276. 



black tridactylus ad., 



h''. Sides of the chest and breast with only a 



few narrow striations, the Hanks and thighs [summer, pp. 277-8. 



sparingly spotted with black crissoleucus ad. 



b' . Lateral tail-feathers uiiiforui ; with scarcely 



any white on the top of the head dorsalis ad., p. 278. 



B. Back uniform white ; under surface of the body 



uniform pure white ; lateral tail-feathers uni- [winter, p. 278. 



form or partially barred crissoleucus ad. 



C. Back barred. 



c'. Back distinctly barred with white, the bars [p. 280. 



narrower tliau the black interspaces americanus ad., 



(/'. Back irregularly barred with white, the bars 

 broader than the black interspaces and some- 

 times confluent in the centre and forming a [p. 281. 

 partial stripe alascensis ad., 



D. Back uniform blue-black arcticus ad., 



[pp. 282-3. 



* Dr. Stejueger, in the ' Proceedings of the United States National Museum,' 

 1886, p. 116, has given a full description of the type specimen, which need not 

 here be repeated. In his diaguosis of the species he has been compelled (for 

 want of a. specimen of L. insidaris) to compare his bird with 1). leiwonotus. 

 I have founded my brief diagnosis upon Dr. Btejneger's description and plate, 

 compared with 1). insidaris. 



t The males of all the species comprised in this genus may be known by 

 their yellow cruwus. 



