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NOTICES OF BOOKS. 



Annali BELLA Regia Scuola Superiore di Agricoltura di 

 PoRTici, series 2, vol. vii. (1907); vol. viii. (1908). 



We have received the above Annali from the Director of the 

 School of Agriculture, Portici (Naples), giving the results of 

 the work carried out during the years 1907 and 1908. Several 

 of the papers are of biological interest, and will repay attention 

 by those members who have devoted themselves to Entomology. 

 Of such papers is the contribution by Signor G. Martelli, on the 

 biology of Pieris hrassicae, L., in which he deals with the life- 

 history of the insect in the neighbourhood of Portici, and with 

 the various parasites belonging to the Chalcididae, Tachinidae,. 

 etc., which infest it during its larval stage. Dr. Luigi Masi 

 describes the Italian Chalcididae in two elaborate papers (vol. vii. 

 and vol. viii.), which form a very valuable contribution to our 

 knowledge of this extremely difficult division of the Hymenoptera. 

 Each species is dealt with in detail, and the perfect insect figured 

 in the text. Following Dr. Masi's paper is Dr. G. Leonardi's 

 monograph on the Italian Coccidae. 



Signor F. Silvestri has made a study of the embryology of 

 the following parasitic Hymenoptera : Ageniaspis fuscicollis, 

 Dalm., Encyrtus aphidivorics, Mayr., and Oophthora semblidis, 

 Aur. He illustrates his paper on this subject with figures 

 showing the segmentation phenomena in parthenogenetic ova, 

 the formation of the blastoderm, and the development of the 

 various organs in the embryo. 



The results of a series of experiments on the micro-biology of 

 the maceration (steeping) of vegetable fibres for industrial pur- 

 poses is contributed by the Director, Prof. G. Possi, and his 



