53 



LizER (Carlos). Heliothrips haemorrhoidalis injurious to Ornamental 

 Plants in the Province of Buenos Aires, Argentina. — Abstract from 

 Agronomia, Buenos Aires, 1915, vi, no. 36-38, pp. 9-11, 3 figs., 

 — MthJy. Bull. Agric. & PI. Dis., Rome, vi, November 1915. 



The author first noted the presence of Heliothrips haemorrhoidalis, 

 Bch., some years ago on Euonymus. He did not attribute to this 

 insect the importance it has in certain parts of Europe, as the number 

 of individuals was limited and the host plant seemed none the worse 

 for their presence. At the beginning of January 1915, leaves of 

 Pelargonium peltatum and Lagerstroemia indica were received, upon 

 which these thrips were present in very large numbers and were 

 causing withering of the leaves. Against this pest, 1 per cent, tobacco 

 extract in soft soap and water is successful, care being taken to wet 

 the undersides of the leaves, where the larvae and adult insects mainly 

 congregate. As it is impossible to reach the eggs, which are well 

 protected by the epidermis of the leaf, the treatment must be repeated 

 about once a week. In greenhouses, where there are no very delicate 

 plants, recourse can be had to fumigation with some preparation of 

 tobacco. 



Aeens (P.). Dactylopius adonidum on Coffee in Java. — Abstract from 

 Meded. v. h. Proefst., Malang, Soerabaia, 1914, no. 7, pp. 20-24. 

 — Mthly.Bull. Agric. Intell. <& PI. Dis., Rome, vi, November 1915. 



During the long drought of the last few years, Pseiidococcus 

 (Dactylopius) adonidum has increased to such an extent as to 

 cause much injury to many coffee plantations. This scale-insect 

 punctures the berries, which turn black and fall off. It has also been 

 found on the tips of young shoots and may kill older plants by attacking 

 their roots. During the rainy season, most of the plantations suffer 

 but little from this pest. Its spread has been favoured not only by 

 the dryness of the last few years, but also by the increasing use of 

 lamtoro [Leucaena glauca) as a shade-tree instead of dadap {Erythrina 

 sp.). A petroleum emulsion has been used with complete success in 

 the control of this scale. 



Entomologia Agraria, manuale sugli insetti nocivi alle piante colti- 

 vate, campestri, ortensi e loro prodotti e modo di combatterli. 



[Agricultural Entomology, a manual of insects injurious to culti- 

 vated plants, field and garden crops and their products, and 

 methods of controUing them.] — Edited by the Royal Entomo- 

 logical Station at Florence, Florence, 1915, 484 pp., 4to., 415 figs., 

 price 3 lire. [Received 17th December 1915.] 



The Director of the Station, Professor A. Berlese, who writes the 

 preface to this book on Italian insect pests, points out that the 

 enormous losses to agriculture caused by insects in the past have 

 been either all but neglected, or treated as inevitable. This state 

 of affairs is now entirely changed and economic entomology has 

 become a well established branch of science. The object of this 

 book is to put a clear statement of the relation of insects to plants 

 of all kinds in the hands of the cultivator, to point out the evil 

 which has resulted from the unrestricted circulation of merchandise 



