393 



Of the various poison sprays, Bordeaux mixture, white arsenic and 

 hydrated hme are recommended, and directions as to their preparation 

 and appHcation are given. For the control of Aphids on potatoes 

 1 pt. Black-leaf 40 to 100 gals, of Bordeaux is recommended ; for 

 flea-beetles, Bordeaux mixture should be used alone. 



A new dust has been successful in controlling potato beetles 

 [Leptinotarsa decemlint^ata], hut for blight it is somewhat inferior to a 

 liquid spray. It is composed of 151b. dehydrated copper sulphate, 

 8 lb. calcium arsenate, and 87 lb. hydrated lime. 



Camus (J. S.). Rice in the Philippines. — Philippine Bur. Agric. 

 Manila, Bull. 37, 1921, 90 pp., 47 plates. [Received 15th June 

 1921.] 



The portion of this bulletin dealing with rice pests has been con- 

 tributed by Arsenio Goco. The insects dealt with are : Leptocorisa 

 acuta, Thunb. (rice bug), Schoenohius incertellus, Wlk. {punctellus , 

 Z.) (rice stem borer), Melanitis ismene, Cram., Cnaphalocrocis 

 medinalis, Gn., the cutworms ' Prodenia litiira, F., and Spodoptera 

 niauritia, Boisd., and locusts. The remedial measures adopted against 

 these pests are briefly described. 



W.\TERSTON ( J . ) . On some Bornean Fig-insects ( Agaonidae— Hymenop- 



tera,Chalcidoidea). — Bull. Ent. Res., London, xii, pt. 1, June 1921 

 pp. 35-40, 3 figs. 



Notes are given on a small collection of fig-insects from Sarawak, 

 the new species described being Ceratosolen hewitti and Eupristina 



verticillata. 



Hill (G. F.). The Life-history o£ Euthyrrliinus mediiabundus, Fabr., 

 an important Weevil Pest of Mango Trees in Australia. — Bull. 

 Ent. Res., London, xii, pt. 1, June 1921, pp. 63-66, 1 plate, 1 fig. 



Mango trees in North Queensland are attacked and often killed by 

 a weevil, Euthyrrhinus yneditahundus. The eggs are laid in September 

 in a hole in the bark made by the adult with its proboscis. The young 

 larvae tunnel into the bark ; a few shallow grooves are sometimes 

 made in the sapwood, and a gallery is then bored horizontally towards 

 the heartwood. The terminal twigs wither and the branches ultimately 

 die. As a rule the injury caused by the larvae is such that the branch 

 is destroyed before the first beetles emerge. Pupation takes place 

 near the cambium, and the beetles have been observed to emerge 

 from April to the end of August. Beetles that emerged from a dead 

 tree migrated at once, those from a partly dead one gathered on, and 

 oviposited in, the remaining living portion. 



While the young larvae are near the surface of the wood they are 

 often parasitised by the Chalcids, Chalcis euthyrrhini [see below], 

 Thaumasura curculionis, Gir., and T. pavo, Gir. Two Hymenopterous 

 egg-parasites also occur, and a Braconid has often been taken on the 

 infested branches. 



These parasites do not, however, control E. meditahundus, and 

 artificial means must be resorted to. The only recommendation that 

 can be made at present is that badly infested trees should be cut down 

 and burnt before the adult weevils leave them, for it is evident that 

 they cannot be saved once the main branches and trunk are heavily 

 infested, 



(3719^ 2 E 



