202 AMERICAN MIDLAND NATURALIST 



vations in April, with a long interval of 8 days between the second 

 and third record. The writer searched for the species twice a day 

 on the days it was not seen, but failed to find the birds anywhere. 



In the dates of observation of the Hermit Thrush, one or two 

 long intervals occur each year in April. In 191 2, there were periods 

 of 12 and 14 days during which the species was not recorded. In 

 1 9 13, 9 days was the long interval when this thrush was not ob- 

 served. It would be difficult to assign a cause for these long in- 

 tervals, for the weather was not cold during the absence of the 

 species in April, 191 2. 



Another species whose records for 191 2 and 19 13, in April, 

 show much difference is the Barn Swallow. In 19 13, there were 

 but two records — x\pril 11 and 30; in 191 2, six records and no 

 long period between is shown. Towards autumn I have found 

 this species irregularly, and conclude that during times of mi- 

 gration this swallow may not be found frequently. 



The presence of the Yellow Palmer Warbler in April, from the 

 date of arrival almost daily until the time of departure in May, 

 was usual for this species. In April, 191 2, this warbler was not 

 once recorded, which was remarkable; for the Yellow Palm most 

 often arrives in spring soon after the Myrtle Warbler, the earliest 

 of all our warblers. 



Another species which had a record in April, 191 2, similar to 

 that of the Yellow Palm Warbler was the House Wren. This bird 

 generally arrives the last week in April; but this month was 

 very cold for the season in 191 2, which, doubtless, was the cause 

 of the late arrival of the House Wren in that year. 



On May 26, a very heavy rainfall occurred, beginning at i 

 a. m. and lasting all day. At 2 p. m. the temperature was 50°. 

 I went out for about half an hour and walked in ^ small park near 

 the Main Building, but saw only a Robin and a Bronzed Grackle. 

 But for this storm a number of species would have been recorded 

 every day in May. 



The Towhee showed a marked difference both in April and 

 May in 19 12 and 19x3. In the spring of 191 2 only 8 records were 

 made for the species — 4 in April and 4 in May; whereas in 19 13, 

 there were 14 records in April and 17 in May. The writer has 

 found no species that shows more striking differences than the 

 Towhee. Whole seasons may pass without the presence of this 

 species in certain localities where it ought to be found. 



