88 



if application is made b}- the States of which they are dependencies. 

 This convention becomes operative within 3 months of ratification in 

 the case of the first 3 States to ratify ; for the remainder within 

 6 months of the ratification being handed to the Itahan Government. 



PicciNixo (G.) & TiBEKTi (G.). Description de I'Appareil, mont^ sur 

 un Autochar, pour la Destruction des Sauterelles. — Genoa, Tipo- 

 grafia opcraia di Ciarlo Gio. Batta., 1920, 20 pp., 1 plate. (Notice 

 in L'Agric. Colon., Florence, xiv, no. 11, November 1920, 

 pp. 502-503.) 



The authors have patented an arrangement consisting of a military 

 searchlight mounted on a motor-car ; this also carries a suction-fan 

 apparatus within which revolve cylinders fitted with sharp blades. 



The sudden, intense beam of light is intended to disturb and attract 

 locusts, which are then sucked up and cut to pieces. The motor provides 

 rapid carriage from one place to another. 



As the principle on which this method is based has already been used 

 in China against locusts, it is hoped that the new apparatus will be 

 tested by experts. 



D.4 CosT.\ Llma (A.). Sobre os Casulos de dois Curculionideos, um das 

 quaes 6 uma Especie nova de um novo Genero da Familia Orobitidae. 



[The Cocoons of two Curculionids, one of which is a new Species 

 of a new Genus of the Family Orobitidae.] — Arch. Escola Sup. 

 Agric. e Med. Vet., Nictherov {Rio de Janeiro), iv, no. 1, June 

 1920, pp. 9-14, 1 plate. [Received 21st December 1920.] 



The cocoons of Phelypera schiipeli, Bhn., from Bombax monguba, 

 and all stages of Malacobius capucinus, gen. et sp. n., from an unknown 

 plant are described. 



PoPENOE (W.). The Avocado in Guatemala. — U.S. Dept. Agric, 

 Washington, D.C., Bull. 743, 17th April 1919, 69 pp., 23 plates. 

 [Received 21st December 1920.] 



In the course of this paper dealing with the various races, uses and 

 cultivation of the avocado a short chapter is devoted to its chief enemies 

 in Guatemala. These include : — a new species of Conotrachelus [perseae, 

 Barber] [R.A.E., A, vii, 240], the larvae of which are sometimes found 

 in mature avocados ; Ceratitis capitata (Mediterranean fruit-fly), 

 widely distributed and ranging from elevations of 1 ,000 to 5,300 feet ; 

 gall-making Psyllids, probably Trioza koebelei. Kirk., abundant 

 and causing injury to the leaves ; and Caulophihis latinasus. Say 

 (broad-nosed grain weevil), infesting the seeds, as does also Stenoma sp. 



The scale-insects infesting avocado trees include Pulvinaria floccifera, 

 Aspidiotus lataniae, A. subsimilis, Chrysomphalus dictyospermi, C. per- 

 seae, C. personatus (masked scale), C. scutiformis, Diaspis boisduvali, 

 Pseudoparlatoria ostreata and Lepidosaphes mimosarnm. These scales 

 are not very destructive in Guatemala, but their introduction into 

 California or Florida should be strictly guarded against, as they might 

 become serious pests under different conditions. 



Gallard (L.). Strawberry Culture around Sydney.— .^^g-nc. Gaz. 

 N.S.W., Sydney, x.\xi, pt. 11, November 1920, pp. 815-820, 1 plate. 



Strawberry pests in New South Wales include red spider [Tetranychiis], 

 which often attacks the undcr-surface of the leaves in hundreds, giving 



