264 McGregor, Young Plumages of Mexican Birds. Ljuly 



not exactly referable to L. I. gavtbeli, but appears to be nearer 

 that than either of the other U. S. forms." 



On Santa Cruz Island, May 6 to 11, 1897, Mr. R. H. Beck 

 collected nine adult Shrikes and one young of the year, which 

 were generously placed in my hands for description. These birds 

 are marked as parents, respectively, of sets of 5, 5,4, and 2 eggs. 

 In forwarding these Shrikes, Mr. Beck writes : " They were the 

 wildest land birds I ever saw by far." 



YOUNG PLUMAGES OF MEXICAN BIRDS. 



BY RICHARD C. MCGREGOR. 



Pipilo carmani Lawrence. Socorro Towhee. 



This Towhee was the most abundant land bird on Socorro 

 Island and in contrast to its mainland relatives it was not shy. 

 Its general habits and notes are quite similiar to those of the 

 Spurred Towhee. 



But one young bird was taken and it is nearly adult. 



No. 1289, $ juv., coll. R. C. McG., Socorro Island, Mexico, May 13, 1897. 

 Plumage much as in the adult. Black throat and chin patch wanting ; 

 tawny'patches on sides pale, indistinct, and small; feathers of other 

 lower parts dirty white with long, dark, central spots ; tertials and feathers 

 of mantle edged with tawny. White spot of tail on outer feather only 

 9.5 mm. long. 



Ammodramus sanctorum Cones. San Benito Sparrow. 



The nest and eggs of the San Benito Sparrow have been 

 described in the ' Osprey,' II, 42. It remains only to describe 

 the young plumage. The youngest birds have no markings on 

 the lower parts {v. Brewster, B. N. O. C, IV, 36) but the breast 

 streaks soon appear. The youngest bird which I have is here 

 described. 



No. 1058, $ juv., coll. R. C McG., San Benito Island, Lower California, 

 March 30, 1897. Upper parts like adult in general looks, but somewhat 

 lighter and less olivaceous ; feathers of head and neck broccoli brown 



