Vol. VI] SWARTH— RACES OF BEWICK WREN 7\ 



p. 113), and tentatively referred to ercniophilus by Oberholser 

 (1898, p. 429), may well be of the same race as the Warner 

 Mountain bird. 



Sacramento Valley. Thirty-eight specimens from the fol- 

 lowing counties : Tehama, Glenn, Butte, Colusa, Sutter, Yolo, 

 Solano, and Amador. Of this series 25 are adults, the re- 

 mainder in Juvenal plumage. They were collected during 

 spring and summer, from early March until the mid- 

 dle of July, hence the adults are all in rather worn 

 plumage. Despite this wear, however, these specimens uni- 

 formly exhibit to a marked extent the characteristic reddish 

 dorsal surface of the subspecies. As indicated above Sacra- 

 mento Valley birds may be regarded as typically representa- 

 tive of the interior form, drymoecus. 



San Joaquin Valley. Birds from this valley are not so 

 easily or satisfactorily disposed of. Both Oberholser (1898, 

 p. 437) and Ridgway (1904, p. 563) have included this re- 

 gion in the habitat of drymoecus, but the former author at 

 least had no examples from this valley, as shown by his list 

 of the localities from which specimens were examined. The 

 region is not satisfactorily represented in the series now avail- 

 able, but there is at hand a series of seven skins from Modesto, 

 Stanislaus County (Mailliard coll., nos. 6987, 6993, 7125, 

 7333, 7385, 7386, 7400), two specimens from Raymond, Ma- 

 dera County (Mus. Vert. Zool., nos. 19,688, 19,689), and one 

 from Lane Bridge, near Fresno (Mus. Vert. Zool., no. 19,687). 

 All of these points are in the east central portion 

 of the San Joaquin Valley. Of these the Modesto 

 birds were collected in January, February, March, and 

 May, the Lane Bridge and Raymond examples in April. 

 Some of them are breeding birds, and the probabil- 

 ities are that the January and February specimens are 

 also examples of a resident form. At any rate peculiarities 

 of appearance can hardly be explained on the ground that the 

 birds are wandering examples of charienturus, for this more 

 southern form would hardly be found represented by in- 

 dividuals wintering so far north of their summer home. On 

 the other hand, these San Joaquin Valley birds are too unlike 

 Sacramento Valley drymoecus to be regarded as southward 

 traveling visitants from that region. 



