236 



Upon the whole S. incertellus is responsible for the more serious 

 damage. Kemedial measures against S. incertellus are similar to 

 those against C. svnvplex. The best of all, since the larvae of this species 

 have to pass the winter within rice stubble, is burning, cutting or 

 burying the stubble and stumps or submerging them in water. 



The natural enemies of these two borers, besides insectivorous birds 

 and predaceous insects, include two unidentified parasites infesting 

 the eggs and Aniyosoma chilonis, Vier., Ophionellus biguttatus, Mats., 

 Apanteles {Stenopleura) chilocida, Vier., A. siniplicis, Vier., Lissonota 

 japonica, Mats., Chelonismunakatae, Mats., and MicropUtis aomoriensis, 

 Mats., infesting the larvae. A few biological notes on some of these 

 are given. 



Takahashi (S.). Tokuyosakumotsu no gaichu to shiteno okinkame- 

 mushi ni tsuite. [Chrysocons grandis-, Thunb., an injurious Insect 

 of a special Crop.] — Konchusekai [Insect World], Gifii, xxii, no. 1, 

 15th January 1918, pp. 6-11, 1 fig. 



Aleurites corduta is generally planted as a useful tree in Japan, and 

 oil is obtained from the fruit. No insects injurious to this tree seem 

 to have been recorded until recently, when the author has observed 

 the Limacodid, Parasa consocia, WLk., an undetermined Tortricid, 

 and the Pentatomid bug, Chrysocoris grandis, Thunb. , to do no small 

 degree of injury to it. The two former insects damage the leaves, 

 while the latter, though it has hitherto been regarded as a rare insect 

 in Japan, is found in abundance and punctures the fruit of Aleurites 

 cordata with its rostrum, causing it to fall before it is ripe. The 

 adult and nymphal stages and the life-history are described. It has 

 probably two broods a year and passes the winter in the adult stage, 

 ovipositing on the lower surface of the leaf in July. The newly 

 hatched larvae at first attack the leaves and then the buds, inflicting 

 however only minor injuries on the plant at this stage. Adults of 

 this generation appear in August and these, as well as the nymphs 

 arising from them, begin to attack the fruit. The ripe fruit having 

 a hard shell can withstand attack, but unripe fruit sooner or later 

 falls and decays. The adults of the second brood may be seen as 

 late as November, and possibly hibernate under stones. The author 

 believes that Tsuruga and its vicinity is the only infested locality, 

 and that contrary to the opinion of Professor Matsumura, this insect 

 may not be universally distributed throughout Japan. As a remedial 

 measure, the insect may be killed on the trees by means of pine-torches. 

 Kerosene emulsion mixed with insect powder may also be effective 

 against the young nymphs, but has not yet been tested on the spot. 



Jepson (F. p.). Division of Entomology. — Dept. Agric. Fiji, Ann. 

 Rept.fortJie Year 1916, Suva, 20th November 1917, pp. 16-25. 

 [Received 1st April 1918.] 



Bananas in Fiji during the year under review were attacked to 

 some extent by Cosmopolites sordidus (banana borer), though the 

 damage done was slight, probably owing to the wet season. The 

 scale, Aspidiotus destructor (transparens) was prevalent throughout the 

 year, spraying having been interfered with by the excessive amount 



