28 The Wilson Bulletin — No. 106 



Belated Olive-Backed Thrush — On December 11, 1918, after 

 watching the Grosbeaks mentioned above for some time, I moved on 

 a ways and was greatly surprised to flush an Olive-backed Thrush, 

 which also flew to a sumac and began to feed. The bird was care- 

 fully examined to make sure it was neither a Hermit nor a Grey- 

 cheeked, and its unusual reluctance to leave the small cluster of 

 sumac gave me full opportunity for positive identification. Have 

 been unable to find it since that date. 



E. A. Doolittle. 



Painesville, Ohio. 



AVAILABLE MAPS. 



Not infrequently one is tempted to extend his observations and 

 collecting into a region with which he is unfamiliar and for the 

 lack of a good map he hesitates, or if he goes, is handicapped in 

 his work. It is not widely known that a large area of the United 

 States has been carefully and minutely mapped by the government 

 and that map sheets about twenty inches square are available at 

 the small cost of ten cents each. All rivers, streams, lakes, 

 marshes, towns, roads, trails, county lines, houses (in some cases), 

 are shown, and the hills and valleys are denoted by contour lines. 

 Most of the maps cover an area about thirty miles square, though 

 some are drawn up to double this scale. Key maps are sent out, 

 gratis, covering each state and on these key maps are shown the 

 areas which have been mapped to date. Communications should 

 be addressed to " The Director, U. S. Geological Survey, Washing- 

 ton. D. C." 



In addition to the above, hundreds of counties have been mapped 

 by the Bureau of Soil Surveys and by the PostofRce Department, 

 but are not so complete as those made by the Geological Survey. 



A. F. Gainer. 



Nashville, Tenn. 



ANNUAL MEETING 



The announcement by the American Association for the Advance- 

 ment of Science that the 1919 meeting will be held at St. Louis, 

 Mo., during the holiday season, settles for us the place and approx- 

 imate time of our next meeting. We should keep this in mind and 

 plan to attend this meeting. 



