52 Proceedings of the 



the lOtli of that month, when I was accompanied by M. H. 

 Swenk. In July of that year a party, headed by R. H. Wolcott 

 and F. H. Shoemaker, spent part of that month on the Reserve 

 studying the fauna, while I returned to the region on August 

 20 following, and was present until September 3, at which time 

 I left the Reserve for more western portions of the state. Re- 

 turning on September 20, I was again at the Reserve until the 

 24th of that month, which date closed my observations there 

 for the year. The following year, 1912, I reached Halsey on 

 the evening of May 14 and left on September 10, having spent 

 all of the time between these dates on the Reserve, with, the 

 exception of a week from June 28 to Jul}^ 5, 



My personal notes and observations were made during spare 

 time from an entomological problem which was the immediate 

 cause of my presence at the Reserve, most of them in the valley 

 of the ]\Iiddle Loup river, that being the stream which flows 

 immediately past the Reserve station. Several trips were 

 made, however, on horseback across the hills to the Dis- 

 mal river, which, directly south of the station, lies about eight 

 or nine miles away and which presents some features differing 

 from those on the Middle Loup, such as a more meandering 

 course in a narrower valley with heavier and larger timber and 

 a more plentiful sprinkling of native cedars. These trips were 

 made on May 26, June 16 and July 14, 1912. The following 

 list and observations are based primarily upon data from my 

 own note-books, but I have drawn upon the notes of the other 

 observers, Avhich have been placed at my disposal, wherever 

 they have added forms or observations which were not noted 

 by me. The record as presented may be considered as cover- 

 ing a period from May 3 to October 29 with practical complete- 

 ness. 



Perhaps a short description of the various types of country 

 found on the Reserve will aid in a better understanding of 

 some of the notes made in this paper. Briefly stated, two 

 faunal regions occur on the Reserve, Sandhill and Prairie, the 

 former Upper Sonoran and the latter Carolinian. The Sand- 

 hill type of country is the predominant one and occupies all of 

 the territory with the exception of the river valleys which are 

 more of the Prairie type, and which exist as narrow tongues 

 extending well into the sandhills. Both regions contain var- 

 ious types of habitats which are more or less distinct in certain 

 respects, although it is not always possible to delimit them 

 solely by the nature of their bird population. These habitats 



