159 



The eradicatioji of this pest is therefore one of the greatest economic 

 entomological problems and involves among others the cattle tick 

 problem and malaria suppression, as these are indirectly connected 

 with it. 



For the proposed project to be a success it is essential to have 

 the co-operation of the population of the Southern United States. 

 In view of the objects and purposes of the American Cotton Association, 

 which are given in detail, the elaborate plans suggested in the preceding 

 paper may not be necessary, and the author therefore now outlines 

 his scheme, which is to be considered as a business proposition and 

 would involve an appropriation of at least £5,000,000 to be granted 

 by Congress. 



Zanon (V.). L'Orticoltura a Bengasi. [Horticulture at Benghasi, 

 Tripoli.] — Agric. Colon., Florence, xiii, no. 3-6, 30th June 1919, 

 pp. 154-176. [Received 12th February 1920.] 



Among the injurious insects recorded are the following : — Lepidop- 

 tera : Feltia (Agrotis) exclamatioms on tomato and various salads ; 

 Agrotis pronuba on peas and salads ; Agrotis sp. on Capsicum annuum ; 

 Acheronfia atropos on Solamim melongena ; Calocamjia exoleta- on 

 peas ; Helhila undalis on cauliflower and cabbage ; Papilio macliaon 

 on Foenicion officinale and F. piperitu.m ; Pieris brassicae on cauli- 

 flower ; and Phytometra {Plusia) gamma on tomato, Capsicum annuum 

 and various salads. . 



Coleoptera : Epicometis squalida on Vicia faba ; Lixus angninua on 

 cauliflower and cabbage ; L. junci on beet ; and a Meloid beetle on 

 Vicia faba. 



Rhynchota : Aphidae, Aphis maidis on Sorghum vulgare, and Aj^his 

 sp. on Eleiisine coracaria. 



Diptera : Pegomyia hyoscyami {Anthomyia conformis) on spinach. 



Del Guercio (C). Cecidomyid Enemies of Aphids. — V Agric. Colon., 

 Florence, xiii, no. 1, 28th February 1919, pp. 31-62, 31 figs. 

 [Received 12th February 1920.] 



The following species are dealt with : Rondaniella phorodontis, 

 sp. n., attacking Phorodon humuli : R. macrosiphonis, sp. n., attacking 

 Macrosiphvm sp. on artichoke ; R. macrosiphoniellae, sp. n., attacking 

 Macrosiphonielki, sp. on chrysanthemum ; R. ornata, sp. n., attacking 

 an Apliid on ornamental cjuince ; R. cucullata, sp. n., attacking Toxop- 

 tera sp. on privet ; Trilobia aphidisuga, gen. et sp. n., attacking Aphis 

 rumicis ; UncinuleUa criosomiperda, gen. et sp. n., attacking woolly 

 aphis {Eriosoma lanigerum) ; Adelgimyza strobilobii, gen. et sp. n., 

 attacking Chermes {Adelges) [strobilobius] on larch ; and Adelgimyza 

 daefylopii, sp. n., attacking mealy-bugs. 



Each of these Cecidomyids is dealt with separately and in each 

 case descriptive, systematic and biological notes are given. Toxoptera 

 sp. on privet, which is attacked by Rondaniella cucullata, is also 

 infested by a species of Aphidius, and these two enemies sometimes 

 reduce its numbers to such an extent that no injury results to the 

 plant. The genus Trilobia is provisionally erected on the larval 



