284 



injured hedges of cultivated spruce trees. Chermes piceae was reported 

 from silver spruces at Christiania, and Lachmis piceae appeared on a 

 spruce hedge and in a nursery. 



Cidaria dilutata, Cheimatobia brumata and Cossiis cossiis attacked 

 birch trees. The ravages of Hyjyonomeuta euonymellus in the south- 

 western part of the country has now been going on for four years. 

 Oak leaves were mined by Tischeria coniplandla and PhyUocnistis 

 suffuseUa. 



The outbreak of Galenicella [Gcderuca) lineola, which began in 1912, 

 appeared to be on the decrease in 1915, but the alders in many districts 

 had been completely destroyed. Melasoma {Lina) aeneuni, which 

 occurred in company wdth G. lineola in 1913 in western Norway, 

 appeared in great numbers at Sogn in 1915. Phyllodeda vitellinae 

 was- reported from some localities and Drepcmosiphwn platanoides 

 was still more abundant on maple in 1915 than in 1914 in the southern 

 and western parts of the country, causing the leaves to drop in July 

 and August. Eriosoma {Schizoneura) tremidae was exceedingly numerous 

 on aspen in many localities. 



ScHOYEX (T. H.). Beretning over Plantesygdome i Norge 1916. 



[ReiDort on Plant Diseases in Norway in 1916]. — Saertryk ur 

 Landtbruksdirektdrens Aaisberetning for 1916, Christiania, 1917, 

 pp. 37-85. 



Severe injury to cereals, caused by wire-worms, was reported from 

 Ostlandet, the cold weather in the early summer retarding the growth 

 of the crops and exposing them to the attacks of the larvae. The 

 larvae of Tijyula oleracea were reported to have attacked the roots 

 of oats and barley. Hydrellia griseola, Fall, also damaged oats, 

 especially in Trondhjem county in July. OscineUa frit has been 

 recorded on oats and barley in several localities. Clinodiplosis 

 mosellarum, Geh., is now recorded for the first time as. injurious in 

 Norway, ears of wheat containing larvae having been found at the 

 beginning of September. Aphis avenue was very numerous in many 

 parts of the eastern districts, but probably owing to unfavourable 

 climatic conditions no serious damage was done. The author suggests 

 destroying the bird-cherry trees as a means of deaUng with, this pest. 

 Macrosiphum granarium was reported from oats and barley. Ears 

 damaged by thrips were also recorded. Grasses were attacked by 

 larvae of Melolontha hippocastani, Clidogastra fiavipes and Pedicidoides* 

 gram inum. 



Clover was injured by Aptinothrips riifus and peas by Kakothrips 

 pisivora {Thrips robnstus). 



Cabbage was attacked by Barynotus squamosus {schdnherri). This 

 seems to be the only instance where this beetle has done any harm 

 in Europe, whereas in Canada it is a recognised cabbage pest. The 

 larvae of Ceuthorrhynchiis rapae were found in the stalks of turnips 

 at Stavanger. Other cabbage pests were Pieris brassicae, Barathra 

 brassicae, Euxoa {Agroiis) corticea, Tipida oleracea, and Phorbia {Chor- 

 tophila) brassicae, of which outbreaks occur periodically. The larvae 

 of Scaptomyza sp. were found mining in the leaves of cabbage and 

 turnips. Podurids were found in great numbers on turnips and 

 cabbage, and Psila rosae occurred on carrots. 



