402 



Maki (S.) & Bin (G.). Takenoko no gaichu ni tsuite. [On the injurious 

 Insects of Bamboo Shoots.] — Ringyo Shikenyo Hokoku [Report 

 from the Forest Experiment Station], Formosan Government 

 Industry bureau, Taipe, Publication 104, no. 5, 28th March 1918, 

 pp. 85-100, 3 plates. 



Bamboo shoots are widely used for food in Japan. In Formosa, 

 out of 21 species of bamboo belonging to 4 genera, Bamhnsa oJdhami, 

 Dendrocalamus latiflorus, PhyUostachys mokinoi, and P. mitis are 

 known to be edible. In that island bamboo shoots are grown very 

 largely ; for example, a bamboo guild of the Nanto Prefecture [in one 

 year ?] dealt in about 840 tons of bamboo-shoots of a value of about 

 £15,000. 



The authors have studied the insect pests of these edible bamboos 

 and have discovered three species. 



The weevil, Cyrtotrachelus longipes, F., infests bamboos from April 

 to September or October. It makes a longitudinal slit on the shoots 

 with its rostrum from one to four inches below the apex, in which it 

 deposits one or rarely two eggs. The eggs hatch out in 4 or 5 days, 

 and the larvae devour the stem. Pupation takes place in the soil, 

 fhe natives use the adult weevil for food, and it is often used in 

 medipinp. As no satisfactory preventive measure is as yet known, 

 this utilisation of the weevil for food should be encouraged for the 

 presejit. 



The Trypetid fly, Acroceratitis plumosa, Hendel, is an endemic 

 species in Forniosa and is a very formidable pest. The adult fly 

 ocpiirs throughout the island during the whole year. It deposits 

 a jiiimber of eggs in the young shoots under the sheath. The eggs 

 hatch out shortly afterwards and the maggots penetrate into the stem, 

 boring in several directions and causing the shoot to decay. The 

 mature larvae enter the soil and pupate. As regards preventive 

 measures, bamboo-shoots should be covered with fallen leaves, etc., 

 so as to prevent the oviposition of the adult flies. The infested 

 shoots should be fumigated with carbon bisulphide, which may kill 

 both larvae and pupae, if fumigation is carried out for over 12 hours, 

 but no really effective measures are known. 



The Coreid bug, Notobitus m-eleagris, F., about which little is known, 

 lays 10 to 20 or more eggs in rows on the sheath of the bamboo-shoot. 

 The newly hatched yomig suck the stem of the shoots. The only 

 remedial measure suggested is the removal of the eggs. 



Yano (M.) & KoYAMA (M.). Shinyo ju Shushi Kiseiho ni tsuite. [On 

 Wasps parasitising the Seeds of Coniferous Trees.] — Ringyo Shiken 

 Hokoku \Rep)ort of Forest Experiments'], Forestry Bureau, Tokyo, 

 no. 17, 30th March 1918, pp. 38-58, 1 plate. 



The fact that certain Hymenoptera belonging to the Chalcididae 

 infest the. seeds of coniferous trees, such as Cryjjtomeria japonica, 

 Chamaecyparis obtusa, Thujopsis dolabrata, Larix leptolepis, Tsvga 

 sieboldi, etc., was recorded in Japan as long ago as 19(35, though they 

 were not then specifically determined. 



The Chalcididae, other than the Agaoninae and Isosominae, 

 were formerly thought to be solely parasitic in other insects, but the 



