Vol. VI] SWARTH— RACES OF BEWICK WREN 65 



closely similar in coloration; compared with calophonns as 

 represented on the coast of Washington and Oregon, it is 

 brighter and less sooty. In size and proportions, intermediate 

 between calophoniis and spilurus, though nearer the latter. 



Remarks — The wrens of the northern coast region of Cali- 

 fornia present certain peculiarities of appearance which were 

 commented upon, first by Oberholser (1898, p. 440), and later 

 by Ridgway (1904. p. 565, footnote). The race marinensis was 

 formally described by Grinnell (1910, p. 307) upon the basis 

 of these, same peculiarities. 



There have been available for comparison in the present 

 connection, besides the series of the several California sub- 

 species, 18 skins of caloplionus from Vancouver Island, and 10 

 from the mainland of the Puget Sound region of Washington 

 and Oregon. Inspection of these series develops several in- 

 teresting points in regard to the wrens of the northwestern 

 coast region in general. Judging from the material at hand 

 it seems evident that caloplionus does not occur in California, 

 unless it is to be found on the coast of the extreme northwest- 

 ern corner of the state, from which point there are at this 

 time no specimens available. Furthermore, in the range of 

 country at present ascribed to caloplionus, there appear to be 

 two distinct types existent, lumped under the one name, races 

 which eventually may have to be separated in nomenclature. 

 Specimens from the mainland of Washington and Oregon, 

 which may be considered as typical of caloplionus, present the 

 extreme of dark coloration in this species. Vancouver Island 

 birds are distinctly paler and more reddish, though of practi- 

 cally the same size. Thus there is the dark colored mainland 

 caloplionus situated between the Vancouver Island (unnamed) 

 fonn to the northward, and marinensis to the southward, these 

 latter two being paler colored and more reddish, and practi- 

 cally alike in coloration. 



To put it a little differently: Beginning at the northern 

 limit of the range of Thryomanes bewicki on the Pacific Coast, 

 there is first, on Vancouver Island, a dark, reddish-colored 

 bird of relatively large size. Immediately to the southward, 

 on the mainland of the Puget Sound region, there is an ap- 

 preciably darker, more sooty form (typical caloplionus), of 



