182 U.S. NATIONAL MUSEUM BULLETIN 23 3 



Fuertes' Oriole 



Icterus fuertesi (Chapman) 



Graber and Graber (1954, p. 277) have added this oriole to the 

 known hosts of the eastern race of the bronzed cowbu-d. Between 

 Tampico and Loma del Real, Tamaulipas, they found a nest con- 

 taining one young each of the host and the parasite. From the 

 locality, it is apparent that we are dealing here with the eastern, 

 nominate race of the bronzed cowbird. The orchard oriole, /. 

 spurius, a close relative of the present species, has long been known 

 as a not uncommon victim of this parasite. 



Scott's Oriole 

 Icterus parisorum (Bonaparte) 



A single record of this oriole as a victim of the bronzed cowbird 

 has come to my attention. Bent (1958, p. 242) stated that in southern 

 Ai'izona he found it to be imposed upon by the northwestern race of 

 the parasite, T,a. milleri. 



Black-headed Oriole 



Icterus graduacauda (Lesson) 



Bendu'e (1895, p. 601) considered this species the most frequent 

 victim of the bronzed cowbird; he added that, out of 9 sets of eggs 

 in the U.S. National Museum, 7 contained from 1 to 3 of the parasitic 

 eggs, together with 1 or 2 of their own, and that in most cases some 

 of the latter were punctured. Near Brownsville, Texas, in 1924, I 

 found two nests, both of which had been parasitized. In the same 

 area, Goldman and Watson (1953, p. 320) reported seeing a pair of 

 these orioles feeding three practically grown bronzed cowbirds. Kin- 

 ball (1935, p. 59) saw a fledghng bronzed cowbird with a black-headed 

 oriole in attendance at Los Fresnos, Texas, F. F. Nye, Jr. (in litt.), 

 wrote me that he has two parasitized sets of eggs from southern Texas 

 in his collection. All the Texas records refer to the nominate race of 

 the parasite ; Bendire's observations, made in Arizona, concern the race 

 T.a. milleri] all the instances have to do with the race I.g. auduhonii 

 of the host. 



Spotted -breasted Oriole 



Icterus pectoralis (Wagler) 



This oriole was recorded as a host of the bronzed cowbird m the 

 lowlands of El Salvador by van Rossem (Dickey and van Rossem, 

 1938, p. 540). He was told by some of the local people that the bird 

 was one of the most commonly imposed upon victims of the parasite 

 in that area, but he did not list any specific instances. The local 

 form of the oriole is the nominate subspecies; that of the parasite 

 is also the nominate form. 



