280 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



The afternoon of our arrival a recently commenced nest of 

 Cassin's Vireo {Lanivireo solitarius cassini), was pointed out 

 to us by a lady who was staying at the hotel and who had 

 noticed the birds building in a live oak tree under which she 

 was sitting. This nest was again visited on April 24, but no 

 eggs as yet had been deposited. The following summer visi- 

 tants were first met with at this point: — California Yellow 

 Warbler {Dendroica csstiva hrewsteri), April 18; Western 

 Warbling Vireo {Vireosylva gilva swainsoni) and Bullock's 

 Oriole, April 19; Long-tailed Chat (Icteria virens longicauda), 

 April 20; Western Wood Pewee (Myiochanes richardsoni 

 richardsoni) , April 21; Ash-throated Flycatcher (Myiarchus 

 cinerasceits cinerascens), and Lazuli Bunting (Passerina 

 amoena), on April 22. These dates might be considered as 

 fairly approximating the actual dates of arrival for the re- 

 spective species, for the reason that we had not met with them 

 before in spots where one would reasonably expect to find them. 



Up to this point we had not found any Thryomanes, nor 

 positively identified its song, in spite of the fact that Fisher had 

 reported it as "taken in the open chaparral, where it was 

 apparently common" on Mt. St. Helena, but in the chamisal 

 brush at Harbin Springs we heard several and captured one, 

 which proved to be the San Joaquin Wren {Thryomanes 

 hewicki drymoecus Oberholser), but intergrading toward 

 marinensis Grinnell. The scarcity of this genus in the terri- 

 tory we covered is rather remarkable, as no specimens were 

 taken after leaving this place, although we were constantly on 

 the lookout for it. The form marinensis, or Nicasio Wren is 

 the nearest neighbor to the dryma^ciis, or San Joaquin Wren 

 at this point, being found, as with the other humid coast forms 

 only 25 or 30 miles to the westward. 



A couple of the Yolla Bolly Fox Sparrows were found here 

 also, at an altitude of about 2000 feet, their actions indicating 

 that they were paired, although as only one was taken this 

 could not be proved. These two birds were in some low, flat- 

 tened down wild grape vines alongside a road on a steep hill- 

 side and seemed to be accompanying a small flock of Golden- 

 crowned Sparrows (Zonotrichia coronata). One of the fox 

 sparrows was taken and the other hung around for some little 

 time, but kept under cover so well that it was not secured. Mr, 



