160 U.S. NATIONAL MUSEUM BULLETIN 23 3 



race of the cowbird, M.a. ohscurus. In McLennon County, Texas, 

 Strecker (1927, p. 47) found this sparrow to be a host of the eastern 

 cowbird, M.a. ater. 



Black -throated Sparrow 

 Amphispiza hilineata (Cassin) 



The black-throated sparrow has been recorded only a few times as a 

 victim of the brown-headed cowbird. Quillin and Holleman (1918, 

 p. 42) found it parasitized in Bexar County, Texas, where they con- 

 sidered the bird to be a common victim. Merrill (1878, p. 130) noted 

 it as a cowbird host at Brownsville, Texas. Many years later, I (1925, 

 p. 551) also found it to be imposed upon there by the parasite. In 

 the same area I was told by the late R. D. Camp that this sparrow was 

 the commonest victim of the cowbird early in the season before many 

 other birds began to nest. Another record from Brownsville, a set of 

 4 eggs of the sparrow and 2 of the dwarf cowbird, taken on June 16, 

 1913, is now in the collections of the Western Foundation of Vertebrate 

 Zoology. In the U.S. National Museum there is a parasitized set of 

 eggs taken at Eagle Pass, Texas, on June 3, 1902, by Nelson and 

 Goldman. F. C. Nye, Jr., (in litt.) found another parasitized nest 

 east of Laredo, Texas, on June 11, 1942, and still another near the new 

 dam on North Concho River, Tom Greene County, Texas, on June 11, 

 1953. All but the last of the Texas observations refer to the nominate 

 race of the sparrow, A.h. hilineata; the latter report involves the race 

 A.h. opuntia. At Tucson, Arizona, Scott (1887, p. 22) found eggs of 

 the cowbird in nests of the western race, A.b. deserticola, and Bendire 

 (1895, p. 443) also reported a parasitized nest in the same place. 



Sage Sparrow 

 Amphispiza belli (Cassin) 



The sage sparrow is a very uncommon victim of the brown-headed 

 cowbird. Only a single record has come to my notice. In Fremont 

 County, Idaho, Rust (1917, pp. 38-39) found a nest of this sparrow, 

 race A.b. nevadensis, with 1 egg of the sparrow and 2 of the cowbird, 

 race Al.a. artemisiae. 



White-winged Junco 



Junco aikeni Ridgway 



The white-winged junco was found to be a victim of the brown- 

 headed cowbird, race Al.a. artemisiae, in southeastern Montana. 

 A. H. Miller (1948, p. 92) discovered two parasitized nests in the 

 open pine woods of Powder River Count}^, near Otter, in late June, 

 1947. One of the nests contained 1 egg and one young each of the 

 host and the parasite; the other held 2 junco eggs and two young 

 cowbirds. No other instances of cowbird parasitism on this bird 

 have been noted. 



