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



2. Turdus mustclinus, Gm. ( American Wood-Robin), Colias 

 jjJiilodice, Pieris ra^pae and P. hrassicae are eaten by 

 this bird : Gentry, " Life-Histories of Birds of E. 

 Pennsylvania," 1876, i, p. 16. 



3. Sialia sialis, L. (Blue-bird). " They [an immense con- 



course of Terias lisa, Boisd.] did not stay long upon 

 the islands [Bermudas], however, only a few days, but 

 during that time thousands must have fallen victims 

 to the vigorous appetites of the blue-bird (Sialia. sialis, 

 Baird), and black-bird {Mimus caroliounsis. Gray), 

 which were continually preying upon them": J. M. 

 Jones, "Psyche," i, p. 122. 



4. Mimus polyglottus, L. (Mocking-bird), {a) " In Florida, 



as we have been informed by Mrs. Annie T. Slosson, 

 the mocking-bird frequently chases butterflies " : A. S. 

 Packard," Proc. Am. Phil. Soc.l904,"p.401.— (&)"Dip- 

 tera, mosquitoes, butterflies, larvae of non-irritating 

 properties, earthworms and berries of divers kinds 

 constitute their dietary " : Gentry, " Life-Histories of 

 Birds of E. Pennsylvania," i, p. 27. 



5. Mimus carolincnsis, L. (Cat-bird). Observed to prey 



largely on Terias lisa, Boisd. (v. Sialia sialis). 



6. Telmatodytes palustris, Baird (Long-billed Marsh Wren), 

 Its food comprises among other things " many of the 

 Noctuidae and Lycaenidae in the condition of imagoes": 

 Gentry, op. cit. i, p. 89. 



7. Myiodioctes pusillus, Wils. (Green Black-capped Fly- 



catcher). Stomachs contained Co/ias^7w7orficc; Gentry, 

 I.e. i, p. 168. 



8. /S'ei(o^Aa^rtr«4^'ict//a,L.( American Redstart). («) Stomachs 



contained Lycaenidae : Gentry, I. c. i, p. 173. — {h) " The 

 redstart feeds exclusively on an insect diet, consisting 

 chiefly of flies, spiders, plant-lice, butterflies, beetles 

 and different larvae " : Dr. B. H. Warren, " Birds of 

 Pennsylvania" (2nd ed.), p. 191. 



9. Dendroeca virens, Gm. (Black-throated Green Warbler), 



Observed to have pursued and probably captured a 

 Pieris, " apparently Pieris rapae " : A, S. Packard, 

 "Proc. Am. Phil. Soc," 1904, p. 897 (U.S.A.). 



10. Gcotlilypis trichas, L. (Maryland Yellow-throat). " Prof. 

 C. V. Weed, of Durham, N.H., writes that he saw an 

 Antio'iM butterfly in the mouth of a Maryland Yellow- 

 throat": A. S. Packard, I.e. p. 401. 



H. Pyranga, rubra, Sw. (Scarlet Tanager). (a) A butterfly 



