34 Insecta. 
XII. Insecta. 
11920] 
Fall, II. C. On certain species of 
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Fassl, A. H. Beschreibung einer 
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Federici, E. Sulla lotta naturalo 
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Lincei Rend. Roma S^m. 2 29 1920 
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627 
Federley, H. Die Bedeutung der 
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F 61 t, E. P. Four new African gall 
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Maritzburg (491-496). [Diptera.] 629 
Felt, E. P. New Philippine gill 
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Felt, E. P. Four new African gall 
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Felt, E. P. Now Indian gall midges. 
Mem. Dep. Agric. India Ent. Ser. 
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632 
Fenyes, A. Coleoptera : Fam. 
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Ferdinandsen, C. and Rostrup, Sofie. 
Ovej-sigt over Sygdommc hos Land- 
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Ferdinandsen, C. and Rostrup, Sofie. 
Oversigt over Sygdomme hos Land- 
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Ferguson, E. W. and Henry, Mar- 
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Proc. Linn. Soc. N.S. Wales 44 1920 
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Ferguson, E. W. and Hill, G. F. 
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Ferris, G. F. A contribution to the 
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Ferris, G. F. Notes on Coccidae. 
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639 
Ferris, G. F. The first stage larva 
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640 
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Feytaud, J. Sur les rois et reines du 
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643 
Feytaud, J. Sur la destruction dcs 
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Fisher, W. S. and Nicolay, A. S. A 
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Fleischer, A. Eine neue Achenium- 
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