382 



KEVIEW OF JAPANESE BIRDS. 



ably moflified. In preparing them, I have had to suppose that all 

 references to Marsh- tits from Yesso belong to brevirostris, and those 

 from Hondo to boreaUs, but it is quite probable that both forms may be 

 found together in both islands, though the distribution of the great 

 bulk of each form may be as indicated. The uncertainty is caused by 

 the following circumstances : 



When Seebohm, in 1879, named P. japonicus, I believe that he had 

 only Yesso specimens before him. If only the long-tailed form occurs 

 on that island, P. japonicus is only a synonym of P. brevirostris. But 

 in another place (Brit. B. Eggs, i, p. 477) the same author speaks of 

 his P. japonicus as differing from brevirostris in having a shorter tail. 



Measurements. 



* Distance between longest and shortest tail-feathers. t Tail molting. 



The present form in its proportions closely agrees with Pariis Tcamy 

 tschatJcensis (Bv.)*, which only occurs on the Kamtschatkan Peninsula, 

 but the latter is easy distinguishable at the first glance by having the 

 whole back nearly white. It is a very distinct species, and no inter- 

 gradation with the other species of this group is at all likely to be found, 

 Mr. Seebohm to the contrary. This is not the same as the form which, in 

 Dresser's "Birds of Europe," is figured and described as P. kamtschat- 

 kensis. Dresser's bird is P. baicalensis Swinh. 



AEGITHALOSt Herm. 



= 1804. — Aegithalos Hermajsn, Obs. Zool., i, p. 214 (type Pipra europwa Herm.). 

 :=1816. — Mecistnra Leach, Syst. Cat. M. B. Brit. Mus., p. 17 (same type, M. vagana 



Lkach=P. eitrop. Herm.). 

 = 1816. — Acredula Koch, Bayr. ZooL, i, p. 199 (type A. caudata KoCH). 

 <;i8i2. — Aegithalus Boie, Isis, 1822, p. 556 (type Ae. pendulinus). 

 <^1826.—Aeg!itbalu8 Bote, Isis, 1826, p. 975 (emend.). 

 = 1828.— Paroidcs Brehm, Isis, 1828, p. 1284 (type P. candatus). 

 = l8Al.—Orite8 Gray, List. Gen. B., p. 32 (same type) (uec Keys. & Blas., 1840). 

 = \8\&.—Megistura Agassiz, Nom. Zool. lud. Univ., p. 227 (emend.). 

 = 1849. — Megisturus TvMM. & ScHL., Fann. Jap. Avea, p. ^- (emend.). 



When Boie, in 1822, combined Parus candatus and pendulinus to the 

 genus Aegithalus, that name had already been applied to the former of 

 these two species by Hermann in 1804. This gentleman in his "Obser- 

 vationes Zoologicai " described a bird, which was caught in the mount- 



*Pmcile k. Bonaparte:, Consp. A\ ., i, p. 230 (1850).- 

 Kamtsch., p. 297 (1885). 

 ^AiyidaXoi, a titmouse. 



-Parus k. Stejneger, Orn. Expl. 



