MASON AND tEFROYi 83 



PhylloscopincB. Grass Warblers. Exclusively insectivorous, 

 feeding on minute insects, flies, cicadellse, &c., &c., on leaves, or 

 caught in the air. Jerd. B. I., II, 187. 



405. Phylloscopus affinis. Tickell's Willow-warbler. 



8-2-08. Legs of a small weevil. 



Other insect remains (coleoptera only). 



407. Phylloscopus tristis. Brown Willow-warbler. Insects 

 in air and in sand of rivulet. Jerd. B. I., II, 187. 

 Stomachs examined 



December, 1907. 1 



> 7 Specimens. 

 January, 1908. \ 



These birds contained 



7 Small Staphylinids. 



1 Small Elaterid. 



7 Small Lepidopterous larvae (Geometrids ?) 



1 Small Tipulid. 



1 Bibio sp. 

 3 Muscids. 



300 Aphis gossypii. 



A large quantity of buds T and small pieces of leaves, probably 



derived from the larvae eaten. 

 5-2-09. 4 Tanymecus sp. 



2 Myllocerus blandus. 

 5-2-09. 4 Myllocerus 1 sp. ? 



3 Other coleopterous elytra. 

 17-4-09. 4 Geometrid larvae. 



6-4-08. 12 Small Coleoptera (Aphodiids ?). 



7 Small Geometrid larvae. 

 8-3-09. 9 Ephemerids. 



1 Dipteron. 



Summary. Of 366 insects taken by 11 birds, 7 are beneficial, 

 329 injurious and 30 neutral. 



410. Phylloscopus fuscatus. Dusky Willow-warbler. 

 Stomachs examined 



8-3-09. Coleopterous remains. 



Some vegetable matter. 

 12-3-09. 1 Chilomenes sexmaculata. 



2 Geometrid larvae. 



Other insect remains unidentifiable. 

 10-4-09. 2 Lepidopterous larvae. 



Other remains of insects unidentifiable. 

 4-10-08. 4 Geometrid larvae. 



2 Pyralid larvae. 

 31-10-08. 7 Weevils. 



1 Small Coprid. 



