VoL l™ V ] General Notes. 349 



Toxostoma rufum. Brown Thrasher. — Common. Nesting from 

 one to twenty-five feet from the ground. Sets of four and five eggs were 

 common, and at times one or two Cowbird's eggs were placed in a nest. 



Troglodytes aedon parkmani. Western House Wren. — Very com- 

 mon. I set up ten wren boxes, and eight were occupied. Fresh sets of 

 six and seven eggs were found from June 10 to July 1. I made the boxes 

 with different sized entrance holes — f to 1J inches — and I noticed that 

 the boxes with the largest holes were occupied first. 



Planesticus migratorius migratorius. Robin. — Very common. 

 Robins were found nesting both in trees and on buildings. One nest was 

 placed on a fire escape at the Indian School. Some of the nests contained 

 a Cowbird's egg. 



Sialia sialis sialis. Bluebird. — Not very common. The Bluebirds 

 here seem to be nesting very late. July 22 a set of four eggs was found in 

 one of my nesting boxes. 



GENERAL NOTES. 



Larus nelsoni, in Juvenal Plumage, from the Hawaiian Islands. — 



Nelson's Gull, Larus nelsoni Henshaw, is one of the rarest of North 

 American Laridse, and its juvenal plumage is apparently undescribed. 

 It was therefore with considerable interest that the writer discovered 

 among the unidentified gulls in the United States National Museum a 

 female specimen of Larus nelsoni in juvenal plumage, No. 169682, U. S. 

 N. M., collected by Mr. H. W. Henshaw at Hilo on the Island of Hawaii, 

 in the Hawaiian Islands, March 13, 1899. This record adds the species 

 to the list of Hawaiian birds. A few notes on this individual may be 

 acceptable in the present connection. 



This Hawaiian Island individual is rather small, about the size of the 

 smallest specimens of Larus hyperboreus in the United States National 

 Museum collection, and measures as follows: wing, 400 mm.; tail, 155; 

 exposed culmen, 55; tarsus, 66; middle toe without claw, 53. The colors 

 of the soft parts, as indicated on the label, are: " bill black; legs and feet 

 pinkish; eyes hazel." 



The juvenal plumage of Larus nelsoni, which this specimen evidently 

 represents, is much like the corresponding stage of Larus hyperboreus, 

 from which it differs conspicuously in its wholly black or blackish bill (in 

 which respect it agrees with the juvenal plumage of Larus glaucescens) , 

 since the bill in even the nestling of Larus hyperboreus is blackish only 

 at the tip. In plumage it differs principally from Larus hyperboreus in 

 its darker posterior lower parts; more extensively dusky ocular region; 

 and, on the terminal portion of the outer webs of the first three or four 



