232 



housed, all suckers should be destroyed, together with all other 

 possible food-plants. 



If all these methods are carried out carefully there should be no 

 need of dusting or spraying in the fields. If this becomes necessary, 

 the same poisons at half the strength should be used. 



A full description of the beetle in all its stages is also given, with 

 a list of food-plants other than tobacco on which it is known to feed. 



BuscK (A.). Descriptions of New Central American Microlepidoptera. 



— Insecutor Insciliae Menstmus. Washington, D.C-, viii, no. 4-6, 

 April-June 1920, pp. 83-95. 



Among the twenty new species of moths here described is Zetesima 

 Iheobromae from Paramaribo, Dutch Guiana, infesting cacao. The 

 larvae spin two cacao leaves together, and eat the soft parts, leaving 

 the veins, many of the older leaves being skeletonised in this manner. 



AcKERMAN (A. J.). Two Leafhoppers injurious to Apple Nursery Stock. 



~^U.S. Dept. Agric, Washington B.C., Bull, 805, 15th December 

 1919, 35 pp., 5 plates, 2 figs. [Received 1st April 1920.] 



A description is given of the characters, life-history and habits of 

 Emjjuasca mali, Le B., and Enipoa rosae, L., from data obtained in 

 Pennsylvania and Maryland. These two leaf-hoppers have often 

 been confused hitherto. 



The apple leaf-hopper, Empoasca mali, causes much the more 

 serious injury, attacking and curhng the terminal leaves, and stunting 

 the growth of apple trees, young or slow-growing varieties being 

 particularly injured. It suffers but Uttle from parasites, but spiders, 

 mites, Coccinellid larvae, and a bug, Triphleps insidiosus, are 

 predaceous on it to a small extent. 



The rose leaf-hopper, Empoa rosae, feeds on the lower leaves, 

 producing white or yellow spots on them. Its numbers are greatly 

 reduced by parasites. Hymenoptera such as Anagrus epos, Gir., and 

 A. armatvs, Ashm., var. nigriventris, Gir., attack the eggs, while the 

 adults are parasitised by a species of Dryinid. 



A single spraying with 40 per cent, nicotine sulphate at the rate of 

 1-1,500 combined with soap will check an infestation by the 

 apple leaf-hopper so materially that the injury caused by those 

 individuals that escape will be of little consequence ; the spray must, 

 however, be applied against the fir-^t brood of nymphs, as, later, the 

 leaves wall be so curled as to shelter the insects from the spray and 

 render it ineffective. 



The same treatment, three or four weeks earlier, is effective against 

 the rose leaf-hopper, though this species is seldom injurious enough 

 to justify a special application. 



BoRG (P.). The Scale-Insects of the Maltese Islands. — Malta Herald 

 Office, Malta, 1919, 67 pp., 12 figs. [Received 6th April 1920.] 



These notes on the Coccids of Malta have been compiled from 

 the pubhcations of various specialists, local observations on habits, 

 etc., having been added by the author. While all the known species 

 of economic importance existing in the Islands are included.. 



