378 Mr. G. A. K. Marshall on Birds as a Factor in the 



to catch a small butterfly : W. Dearden, quoted by 

 Packard, /. c. (U.S.A.). 



35. Contopus virens, L. (Wood Pewee), {a) Stomachs 



contained insects, including butterflies : Dr. B. H. 

 Warren, " Birds of Pennsylv.", p. 194. — (h) Observed 

 to eat Colias pliilodicc, Argynnis inyrina, GraiJta inter- 

 Togationis, Chrysophanus americamcs, other Lycaenidae 

 and Satyrinae: Gentry, /. c. ii, pp. 64 and G5. 



36. Empidonax acadicus, Gm. (Small Green-crested Fly- 



catcher).- (a) Stomachs contained Satyrinae and 

 Lycaenidae : Gentry, /. c. ii, p. 67. — (b) " Its food 

 consists of insects during spring and summer, such 

 as moths, wild bees, butterflies, and a variety of small 

 kinds": J. J. Audubon, "Ornith, Biogr.," ii, p. 257, 

 87. Chordeilcs virginianus, Gm. (Virginian Goatsucker). 

 Stomachs contained Argynnis aplirodite, Pyrameis 

 cardui, Chrysojjhanns americanus, and many of the 

 Satyrinae and Lycaenidae ; the young are fed also on 

 Pieris oleracea : Gentry, /. c. ii, pp. 95 and 96. 



38. Chaetura pelagica, L. (Spine-tailed Swift). The young 



are fed on Lycaenidae, etc. ; the old birds also eat 

 Argynnis aphrodite and Pyravieis cardui : Gentry. 

 I. c. 'ii, pp. 101 and 102. 



39. Coccyzus americamcs, L. (Yellow-billed Cuckoo), (a) 



" They feed on insects such as caterpillars and butter- 

 flies, as well as on berries" : J. J. Audubon, " Ornith. 

 Biography," i, p. 19. — (h) Stomachs contained Pier is 

 rapae and Lycaenidae: Gentry, /. c. ii, p. 118. 



40. Coccyzus erytliroplitlicdvms, Wils. (Black-billed Cuckoo). 



Stomachs contained Lycaenidae : Gentry, I.e. ii, p. 114. 



41. Dcndrocojrus viUosus, L. (Hairy Woodpecker). Stomachs 



contained Lycaenidae: Gentr}^, /. c. i,p. 130. 



42. Melanarpes erythroccphalus, L. (Red - headed Wood- 



pecker). Stomachs contained Lycaenidae : Gentry, 

 /. c. ii, p. 153. 



43. Falco sparverius,Ja. (American Kestrel). («) Stomachs 



contained "a few of the Papilionidae and Sphin- 

 gidae": Gentry, /. c. ii, p. 252. — {h) A butterfly was 

 found in the stomach of a bird shot at Cataract Creek, 

 Arizona: Dr. A. K. Fisher, "Hawks and Owls of 

 the U. S.", 1893, p. 120 (U. S. Dept. Agr., Div. Econ. 

 Ornith,, Bull. iii.). 



44. Fcdco communis, Gm. (Peregrine). Stomachs con- 



tained Papilionidae : Gentry, /. c. ii, p. 242. 



