370 



Yano (M.). Jural Honpo ni oite Daihassei o naseru Shinrin-Gaichu n- 



tsuite. [Injurious Forest Insects that have hitherto occurred in 

 great abundance in Japan.] — Sanrin-Koho [Public Forestry 

 Report], Imperial Forestry Bureau, Tokyo, no. 6, 15th June 1919, 

 pp. 453-470. 



Neither of the two books deahng with insects in Japanese forests, 

 one by Professor Sasaki recording about 160 species and the other 

 by Professor Niishima deahng with nearly 280, records more than 

 half of the injurious species that occur in large numbers in Japanese 

 forests. 



These include : — Hymenoptera. Tenthredinidae : Nesodiprion 

 basalis, the larvae of which appear in April and August and attack 

 the leaves of Finns densiflora ; Diprion nipponica, the larvae of which 

 occur from August to November and attack Finns densiflora and 

 Larix lejjtolepis ; 3Ionoctenus crypfonieriae, the larvae of which attack 

 Cryptomeria japonica in June and July ; and Cephaleia koehelei, the 

 larvae of which appear in July and attack Larix leptolepis. 



Coleoptera. Scolytidae : Myelop)hilus minor, the adults of which 

 appear in May and infest the bark oiPinus thunbergii, quickly causing 

 the death of these trees ; Crossotarsus sp. damaging Quercus crispula. 

 CuRCULiONiDAE : Htjlobius macilentus, the adults of which oviposit 

 on the roots of the camphor tree, which is killed by the larvae eating 

 the inner layer of the bark ; Rhynchaenus {Orchestes) excellens attacking 

 the leaves of Quercus glandulifera and other trees ; Fhyllobius japonicas , 

 the adults of which attack the buds of Cryptomeria in April. Scara- 

 BAEiDAE : Anomala costata, the adult of which appears in July and 

 attacks Cryptomeria japonica, Chamaecyparis obtusa, Finns densiflora, 

 Larix leptolepis, Abies firma, etc. ; about ten species of root-infesting 

 grubs, mostly those of Melolontha japonica and Heptophylla picea, 

 attack seed-beds. Chrysomelidae : Nodostoma sp. attacking leaves 

 of Cryptomeria japonica, Finns spp., Chamaecyparis obtusa, Larix 

 leptolepis, etc. 



Lepidoptera. Lasiocampidae : Dendrolimus remota, the caterpillars 

 of which appear in August and feed until October, hibernating in 

 this stage ; liunugia yamadai, Nagano, the caterpillars of which occur 

 in April and attack Quercus serrata, Q. glandulifera, etc., this species 

 occasionally appearing in immense numbers in Central Japan. Lyman- 

 TRiiDAE : PortJietria {Lymantria) fumida, the larvae of which appear 

 in May and June and attack Tsuga sieboldi and Abies firma ; P. {Lyman- 

 tria) dispar, the caterpillars appearing in April, May and June and 

 attacking many trees, including Finns densiflora and P. thunbergii ; 

 Euproctis flava, the caterpillars of which appear in September on 

 many trees ; Dasychira obietis, the caterpillars of which attack Cryp- 

 tomeria in August. NoTODONTiDAE : Egonokia derdix, attacking 

 beeches in July and August and the cause of severe injury to forests 

 in 1917. Saturniidae : Caligula japonica, the caterpillars occurring 

 from April to June and attacking chestnut, camphor and many other 

 trees. Geometric ae : Zethenia rufescentaria, of which there are one 

 or two generations in spring and summer, sometimes seriously damaging 

 Cryptomeria forests. Psychidae : Clania minuscula, the larvae of 

 which attack the foliage of many trees from August till October. 

 Elachistidae : Coleophora laricetla, the larvae attacking the fohage 

 of Larix leptolepis in July and the buds in the following spring. 



