282 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



Family ICTERIDAE 



Agelaius xanthomus (Sclater) 



Common name. — Yellow-shouldered blackbird. 

 Natural prey. — Cockroaches, Puerto Rico (Wetmore, 191 6) : 06- 

 thecae and remains of adult cockroaches found in stomachs. 



Dolichonyx oryzivorus (Linnaeus) 



Common name. — Bobolink. 



Experimental prey. — Pycnoscelus surinamensis, U.S.A., Florida 

 (Sanders, 1928). 



Holoquiscalus brachypterus (Cassin) 



Common name. — Puerto Rican blackbird. 



Natural prey. — Cockroaches, Puerto Rico (Wetmore, 1916) : A 

 few eggs (oothecae) of cockroaches in stomachs. 



Black bird 



Experimental prey. — Pycnoscelus surinamensis, U.S.A., Florida 

 (Sanders, 1928). 



Family FRINGILLIDAE 

 Passer domesticus (Linnaeus) 



Common name. — English sparrow. 



Natural prey. — Pycnoscelus surinamensis, Hawaii (Illingworth, 

 193 1 ; Schwabe, 1950b) : Remains of this cockroach were found in 

 the stomach of the sparrow. 



Sparrow 



Natural prey. — Periplaneta amcricana, England (Lucas, 1908, 

 1920). 

 Cockroaches, Japan (Asano, 1937). 



Tiaris bicolor omissa (Jardine) 



Common name. — Carib grassquit. 



Natural prey. — Cockroaches, Puerto Rico (Wetmore, 1916) : Ani- 

 mal food was found in 5 of 72 stomachs examined ; one bird had 

 eaten two cockroaches anions: other insects. 



