86 THE CONDOR Vol.. X 



Outside ^ ^^P^^' 4-^^' ^-25' ^• 



p . . (depth, 2.20, 2.10, 2. 

 ^^^^"^^ 1 diameter, 3.25, 3.20, 3.50. 



Helminthophila sordida. Dusky Warbler. Common from January until late 

 September, in all the large canyons. Rare on the Island in October, but common 

 on the mainland coast. 



Dendroica auduboni. Audubon Warbler. Common, October to February in- 

 clusive. 



Anthus pensilvanicus. American Pipit. One specimen secured, October 18, 

 on the high mesa. 



Mimus polyglottos leucopterus. Western Mockingbird. Fairly common. On 

 the low cacti-covered mesas back of Smugglers' Cove, April 2, I found several 

 unfinished nests in the cacti and holly bushes. The feathers of the foreheads and 

 skins of several specimens were stained by the juice of the cactus apples. The 

 Mockingbirds of the islands have been reported by some collectors as being some- 

 what different from M. p. leucopterus. This theory we have clearly disproved, the 

 specimens taken being identical with mainland specimens, as far as discernible 

 by us. 



Salpinctes obsoletus pulverius. San Nicholas Rock Wren. Fairly common in 

 suitable localities over whole Island. Thirteen specimens preserved during October. 

 In coloration of the back feathers, specimens range from rich brown to very pale 

 grayish-brown, some of the browner ones comparing very closely with the coast 

 mainland specimens, 



Thryomanes leucophrys. San Clemente Wren. Very common on all parts of 

 the Island, especially so on the brush and cacti-covered hillsides of the northeast 

 coast. 



Hylocichla ustulata. Russet-backed Thrush. Common in the larger canyons 

 in October. 



Hylocichla guttata nana. Dwarf Hermit Thrush. Common over entire 

 Island, October until April. 



Ixoreus naevius. Varied Thrush. Near Rowland's in January and February 

 several specimens were taken. Several secured in the canyons near Mosquito Har- 

 bor, March and April. None seen during October. 



Long Beach, California. 



SOME HINTS ON THE PREPARATION OF AN OOI^OGICAlv 



COIvIvECTlON 



By ROBT. B. ROCKWELL 



THE time has not long passed when egg-collecting as a fad was very popular 

 in this country, and as a result a great many collections were formed in dif- 

 ferent parts of the country, many of them thru their vast size being veritable 

 monuments to the rapacity of the "collecting mania." This unnecessary and in 

 many instances wanton destruction called forth the just protests of a growing army 



