178 U.S. NATIONAL MUSEUM BULLETIN 2 33 



Plain Wren 



Thryothorus modestus Cabanis 



There is but a single record of this wren as a host of the bronzed 

 cowbird. Stone (1932, p. 336) mentioned a fledged cowbird being fed 

 and attended by a plain wren at Cantarranas, Honduras, August 5. 

 The wi'en at that locality is of the race T.m. pullus; the parasite is 

 nominate aeneus. 



Sinaloa Wren 



Thryothorus sinaloa (Baird) 



Stager (1954, p. 30) found a nest of this wren (subspecies cinereus) 

 near Naranjo, southwestern Chihuahua, on May 29, containing 2 

 eggs of the wren and 1 of the bronzed cowbird (subspecies milleri). 

 This is the only instance to be recorded as yet. 



Banded Wren 



Thryothorus pleurostictus Sclater 



At Canon de Lobos, Morelos, on July 19, 1960, J. Stuart Rowley 

 (mss.) found a nest of this wren containing 2 eggs of the bronzed 

 cowbird (nominate race) and none of the wren (T.p. nisorius). This 

 is the only record known to me for this host. 



Happy Wren 



Thryothorus felix Sclater 



A single record, without detailed data, is all I have seen of this 

 wren as a host of the bronzed cowbird. A set of eggs of the race 

 T.f. pallidus containing an egg of the parasite (race T.a. milleri) 

 was listed in the catalog of an egg collection offered in 1929 to the 

 late Senator F. C. Walcott, who showed the record to me. 



Bewick's Wren 



Thryomanes hewickii (Audubon) 



There is still but the one record of this wren as a victim of the 

 bronzed cowbird, a record which was included in my first list (1929, 

 p. 334). On May 6, 1924, near Brownsville, Texas, the late A. H. 

 Cordier found a nest of this wren (race T.h. cryptus) containing 3 

 eggs of the bronzed cowbird (race T.a. aeneus) and 1 of the wren. 

 The female wren was sitting on the eggs at the time of observation. 

 The next day all the eggs hatched, but two days later all were de- 

 stroyed by a predator, probably a skunk. 



Northern Mockingbird 



Mimus polyglottos Linnaeus 



This is a rarely victimized species. At Brownsville, Texas, I 

 was told of a nest of this mocldngbird with a very light, bluish-white, 



