12 



with baits of rice-bran. The adult of Epicauta inegalocephala, Gbl., 

 appears in June and occurs until July. It eats the leaf, but leaves the 

 veins. Beating is recommended as efficacious against it. An undeter- 

 mined Curculionid does slight damage to the foliage in one locality. 

 Another weevil, Amystax fnacidatus, Mats., is also a minor pest. 

 Cneorhinus globatus, Hbst., appears in March and becomes still more 

 numerous in April and May. It is a serious pest, destroying both 

 leaves and buds and frequently killing the plants. 



Sasaki (C). Sanji no Joran Enka go ni okeru Kyoso no Sei-iku. 



[The Development of the Silkworm Parasitic Maggot after its 

 Eggs are swallowed by the Silkworm.] — Sangyo Shiken Hokoku 

 [Report of Sericultural Experiments], SericuUural Experiment 

 Station, Tokyo, Vol. iii, no. 7, 15th October 1918, pp. 377-396, 

 3 plates. 



As is well known, the egg of the Tachinid silkworm parasite, Crosso- 

 cosmia sericariae, Kond., is first deposited upon the mulberry leaf, is 

 then swallowed with the leaf tissue by the silkworm and hatches out in 

 the alimentary canal, subsequently penetrating into the gangha of the 

 nervous system of the host. The author has studied, and here describes, 

 the actual process. In 10 minutes after swallowing, some of the eggs 

 have hatched. After 20 minutes the great majority of the eggs 

 have hatched and the larvae travel through the alimentary canal 

 into the body cavity, wandering about between the canal and the 

 nerve cord. After 30 minutes some are endeavouring to penetrate 

 the gangha, while others are wandering about among the muscular 

 or fat tissues. After 1 hour some individuals have penetrated the 

 ganglia or nerve cord. After 3 hours most of the larvae have penetrated 

 into the gangha (mainly the 5th and 6th) and a few are found within 

 the cord. After 5 hours almost all have penetrated into the gangha, 

 some of which may contain as many as six individuals and conse- 

 quently become greatly swollen. After 8 to 15 hours all the larvae 

 are inside the gangha. After 40 hours they all remain in the same 

 situation and are quite undeveloped. After 100 hours they have 

 begun to develop so that each infested ganglion becomes about four 

 tunes the normal size. After 149 hours they have developed consider- 

 ably and some individuals are leaving the ganglia. After 197 hours 

 they have all left the ganglia, which by this time are totally destroyed, 

 and at this stage they burrow into the tracheae near the spiracles, 

 this area becoming dark in colour when seen from above. After 

 245 hours the host silkworm may pupate. At this stage the number 

 of parasitic larvae has greatly diminished, owing to the lack of food 

 or for other reasons, and usually only one fully developed individual 

 survives. 



Province of British Columbia Department of Agriculture. Twelfth 

 Annual Report for the Year 1917.— Victoria, B.C., 1918, 132 pp., 

 20 plates. [Received 7th November 1918.] 



Areas infested with codling moth [Cydia pomonella] have been 

 carefully quarantined and measures against this pest in those areas 

 have been thoroughly carried out. Spraying was done two or three 



