60 IOWA ACADEMY OB" SCIENCE Vol. XXVI, 1919 



and two cowbird eggs. Another nest was pointed out to me on 

 June 8, 1914. This nest had been discovered a few days previous 

 to this and had been washed from its position by heavy rains. 



122. Zonotrichia quernla. Harris Sparrow. A common mi- 

 grant from May 3 to May 17 and from October 3 to 27. One 

 pecuHarity in the migration of this species impressed me. At Sioux 

 City on Missouri river it regularly appeared about the middle of 

 March, while at Marshalltown I searched carefully for them each 

 year and failed to find them until May when they appeared in 

 numbers. 



123. Zonotrichia Icncophrys Icucophrys. White-crowned Spar- 

 row. A rare spring migrant from May 4 to May 15. Four seen on 

 May 14, 1913, is the greatest number noted on any one day. Two 

 were taken on May 10, 1913. I failed to find it in the fall. It was 

 recorded May 10, 12, and 14 in 1913, and May 4, 13, 14, 15, 1914. 

 Single birds were seen on all dates except those mentioned above. 

 The records of May 13, 14 and 15 were probably of the same 

 bird as a single individual was noted about a little spring for three 

 successive mornings during a cold stormy period. It was not seen 

 in 1915. 



124. Zonotrichia albicoUis. White - throated Sparrow. An 

 abundant migrant from April 9 to May 23 and from September 21 

 to November 12. During both spring and fall migration the 

 white throated sparrow was one of the most abundant species found 

 among the migrating hosts of sparrows. Between April 20 and 

 May 14 they were usually at their maximum numbers. October 

 1 to 20 was the corresponding period of abundance for the fall 

 period. 



125. SpiccUa monticola monticola. Tree Sparrow. An abvm- 

 dant winter visitor from September 27 to April 14. The months 

 of October, November, March and April were the periods of 

 greatest abundance as many migrated farther south to spend the 

 winter. 



126 Spizclla passcrina passcrina. Chipping Sparrow. An 

 abundant summer resident from April 7 to October 12. In April 

 the chipping sparrow was one of the most abundant migrating 

 birds, appearing in enormous numbers with some of the migration 

 waves. June 6, 1913, a nest containing four eggs was found and 

 also one containing two nearly fledged young. The first was built 

 in a spirea bush on a lawn in 'Marshalltown and the second in one 

 of the lower branches of a large white pine. June 17, 1915, a nest 



