186 U-S. NATIONAL MUSEUM BULLETIN 233 



lected at Oaxaca, Oaxaca, Mexico, June 3, 1936, by G. D. Smooker; 

 it consists of the race Gx. eurhyncha of the grosbeak and T.a. assimilis 

 of the cowbird. Sennett's instance from Texas concerns the nominate 

 subspecies of both the host and the parasite. 



Painted Bunting 



Passerina ciris (Linnaeus) 



The painted bimting, a frequent victim of the brown-headed cow- 

 bu'd, appears to be imposed upon much less often by the bronzed 

 species. I loiow of only one such case; an egg of the latter bird was 

 taken from a painted bunting's nest near San Antonio, Texas, April 

 1895, by H. P. Attwater, from whom it passed into the A. C. Bent 

 Collection, now in the U.S. National Museum. The record refers to 

 the nominate race of the parasite and to the race P.c. pallidior of the 

 host. 



Blue Seedeater 



Amaurospiza concolor (Cabanis) 



This poorly known species recently has been added by J. Stuart 

 Rowley (mss.) to the list of victims of the nominate race of the bronzed 

 cowbird. At Canon de Lobos, Morelos, on July 8, 1960, he found a 

 nest of this bird (apparently of the subspecies A.c.relicta) containing 

 2 eggs of the seedeater and 1 of the bronzed cowbird. 



Yellow -throated Atlapetes 



Atlapetes gutturalis (Lafresnaye) 



This tropical finch is known as a frequent victim of the bronzed 

 cowbird in Costa Rica. At San Jose, Cherrie (1892, pp. 25-26) found 

 five nests, four of which contained from 1 to 3 eggs each of the bronzed 

 cowbird. Alfaro (1904, p. 180) also has recorded this host in Costa 

 Rica. The parasite in that area is the nominate subspecies, T.a. 

 aeneus; the host is of the race A.g. parvirostris. 



Olive Sparrow 



Arremonops rufivirgata (Lawrence) 



Two records of bronzed cowbird parasitism on the olive sparrow 

 have come to my notice, both reports from southern Texas. Amadon 

 (1940, p. 257) recorded a parasitized set of eggs from Lomita Ranch, 

 near Hidalgo; the eggs are now in the collection of the American 

 Museum of Natural History. F. F. Nye, Jr. (in litt.), informed me 

 that he has a similar set taken by himself in southern Texas. The 

 records involve the nominate races of both the host and the parasite. 



Green-backed Sparrow 



Arremonops conirostris (Bonaparte) 



As reported in an earlier paper (Friedmann, 1933, p. 191), there 

 are three parasitized sets of eggs of this sparrow (race A.c. richmondi). 



