210 U.S. NATIONAL MUSEUM BULLETIN 233 



Golden Warbler 

 Dendroica petechia (Linnaeus) 



Mrs. F. C. K. Anderson wrote me the following: she had been told 

 by a friend who was interested in birds that on two occasions he had 

 seen young fledgling shiny cowbirds being fed by a pair of these 

 warblers near Bridgetown, Barbados. Pinchon and Bon Saint-Come 

 (1951, p. 273) also have noted this warbler as a cowbird fosterer, and, 

 on the strength of their comments, Bond (1951), p. 20) in turn has 

 mentioned it. These records refer to the race ruficapilla of the warbler 

 and to the race minimus of the cowbird. 



Imthurm's Grackle 



Macroagelaius suhalaris (Boissonneau) 



On the basis of a parasitized set of eggs in the C. J. Marinkelle 

 Collection, The Hague, Netherlands, this graclde (race M. s. imthurmi) 

 may be added now to the list of victims of the shiny cowbrid (race 

 M.h. miniinus). The set is said to have been collected in the Guianas, 

 but exact data are not available to me. 



Swainson's Grackle 



Holoquiscalus lugubris (Swainson) 



Previously known as a victim of the shiny cowbird in Trinidad 

 M.b. (minimus), this grackle has been found to be the commonest 

 victim of the Venezuelan subspecies of the parasite {M.b. venezuelen- 

 sis.) Foster D, Smith (Friedmann and Smith, 1955, p. 514) dis- 

 covered that in northeastern Venezuela the shiny cowbird parasitized 

 the nominate race of this grackle not just frequently but apparently 

 exclusively. Smith noted that about a quarter of the young which 

 accompainied the gi-ackles to his feeding station were cowbirds. Later, 

 while still in juvenal plumage, the cowbirds left the grackle flocks 

 and joined flocks of adults of their own species. This is one of the 

 relatively rare cases of a frequently imposed upon host which is 

 considerably larger in size than the parasite. 



Martinique Oriole 



Icterus bonana (Linnaeus) 



This Oriole is an addition to the known victims of the West Indian 

 race of the shiny cowbird {M.b. minimus). Pinchon and Bon Saint- 

 Come (1951, p. 273) record it as being parasitized in Martinique. 



Moriche Oriole 



Icterus chrysocephalus (Linnaeus) 



A single record, from Surinam, of this hitherto unrecorded host is 

 in the collection of Dr. C. J. Marinkelle, to whom I am indebted for 



