1092 U.S. NATIONAL MUSEUM BULLETIN 23 7 part 2 



Oregon junco complex. The San Pedro Martir is the main and high- 

 est mountain mass in the northern section of the peninsula, lying 

 between lat. 30°36' and 31°10' N. Alfred W. Anthony (1889), who 

 described the race, says: "The region embraces a series of small ranges 

 which rise from an elevated mesa, having a mean elevation of about 

 8,000 feet, and an extent of 60 by 20 miles. In these mountains are 

 born the only streams that this part of the peninsula affords, and an 

 abundance of pine timber is found throughout the region." Anthony 

 adds: "J. townsendi is probably the most abundant bird to be found 

 in the timbered parts of the San Pedro Mountain, and is, I think, 

 resident * * *." 



Nesting. — All the information we have about nesting of this race 

 comes from A. W. Anthony (1890, 1893). All the nests he (1890) 

 found were made of soft, dry grasses and lined with finer grass stems 

 and the hair of the mule deer. One nest was "very artfully concealed 

 behind a thick bunch of grass and under the overhanging edge of a 

 large granite boulder." Another "was sunken to the level of the 

 ground, apparently in a cow track, and well hidden in the tall grass 

 on the edge of a running stream." In another year he (1893) states 

 the juncos were building nests upon his arrival in the pines May 5, 

 but he found no eggs until May 10. One "nest was in an old wood- 

 pecker's hole in a large pine that had been blown down, \^dth its top 

 resting on a big boulder. The hole which was about six feet from 

 the ground was on the under side of the trunk and the nest about on 

 a level with the opening; it was composed of dry grasses and lined 

 with deer hair. A nest * * * was found on May 26 in a hole in a 

 rotten stub about ten feet from the ground * * *." He mentions 

 a number of nests, under logs, boulders, and other locations, that he 

 left in the hope of collecting fidl sets, but which he found destroyed 

 when he retiu-ned. Apparently the open natm-e of the forest with- 

 out much ground vegetation partly explains the numbers of junco 

 nests he found in locations not considered usual for the species else- 

 where. 



Eggs. — Three eggs, without exception, constitute a set according 

 to A. W. Anthony (1890). The three sets he reports upon in detail 

 vary widely in their markings. A set he collected May 1, 1889, has a 

 faint bluish-white ground color, profusely and variously spotted with 

 lilac and raw lunber; the eggs measure 20 by 15; 19 by 15; and 18 

 by 15, in millimeters. In another set taken May 5, 1889, the eggs 

 "are uniformly bluish-white with a few of the faintest minute specks 

 of burnt lunber, on the large end, which are not at first noticeable. 

 * * * Measiu-ements 20X15; 19X15; 20X15 mm." In the third 

 set taken May 6, 1889, two eggs "are marked Adth small spots of 

 pale fawn color, ^vith a few small spots and lines of burnt umber 



