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



induce them to lay eggs, but they came to an un- 

 timely end. I saw a robin industriously pecking at 

 the muslin covering the frame, and shortly after being 

 disturbed he returned, started again where he had 

 weakened the muslin, and forcing his way in, slew 

 and ate all the Colias cclicsa. The edusa were 

 visible through the muslin and were walking about 

 on the clover. . . . The same robins this spring 

 destroyed some female card-amines under similar 

 circumstances " : W. Parkinson Curtis (in a letter to 

 Prof. Poulton, dated 22, ix. 1905).— (f^ The robin has 

 been seen to chase, catch or eat common white butter- 

 flies by five correspondents ; while two have seen it 

 take blue butterfiies: The Editor, "Country-Side," 

 1903, p. 290 (England). 



13. Tardus viscivorus, L. (Missel Thrush). Observed to 

 catch a white butterfly : The Editor, " Country-Side," 

 1903, p. 290. 



14. Acroccphalus palustris, Bechst. (Marsh Reed Warbler) 



" They seek many kinds of insects, such as . . . 

 small dragon flies, Phryganidae, Tineidae and small 

 butterflies": Naumann, " Vog. Deut." iii, p. 640. 



15. Acrocephalus schaoiohaenus, L. (Sedge Warbler). A 



pair of Sedge Warblers was observed of which " each 

 had a butterfly in its mouth, and with my field-glasses 

 I was able to identify the species as a Meadow-Brown 

 {E.janira) and a Small White (F.rapac)": O.H. Latter, 

 " Nature," Ix, 1899, p. 520 (England). 



16. Sylvia hortensis, Bechst. (Garden Warbler). In 1895 



at Dorpat, in Russia, Prof. Kennel observed a pair of 

 Garden Warblers (Grasmucken) " which fed their five 

 young all day long almost exclusively with Vanessa 

 urticae, and occasionally with a few Parnassius ame- 

 mosyne [moieinosyoie] and apollo, the latter being a very 

 scarce species in the neighbourhood." He subse- 

 quently adds that Pieris rapac was also used as food 

 by these birds : Prof. J. Kennel, " Biol. Centralb.," xviii, 

 1898, p. 810. 



17. Sylvia curruca, L. (Lesser White-throat). " But they 

 also eat various insect-eggs, small pupae, many small 

 two- and four-winged insects, different species of 

 green plant-lice {Aphis, Linn.), small butterflies and 

 so forth " : Naumann, " Vog. Deut." ii, p. 457. 



18. Phylloscopus trochihbs, L. (Willow Wren). Observed 



