363 



also rather common on barley, and Zabriis gihhus injured it considerably 

 in certain localities. Less damage was due to Mayetiola {Cecidomyia) 

 destructor on barley, Contarinia (C.) tritici and Sitodiplosis mosellana 

 (C. aurantiaca) on wheat, Cephus pygmaeus and Hadena secalis on 

 rye, and Apamea testacea, Lema cyanella and L. melanopa on oats. 

 Thrips were numerous {Limothrips denticornis on rye and barley, 

 and Thrips cercaliiim on oats), but the plants did not suffer much 

 from them. The Aphid, Macrosiphum granarium (Siphonophora 

 cerealis) did not appear in any numbers, but the mite, Tarsonemus 

 spirifex, was numerous in certain localities on oats. 



Tenehrio molitor and Calandra granaria infested stored grain. 



On peas and vetches Sitona lineata was very numerous and 

 injurious, especially in late sown fields. Kakothrips pisivora 

 [Physopus robnstus), Aphids and the larvae of Cydia (Grapholitha) 

 were found on peas, but not in any number. 



Among pests of crucifers, Silpha opaca, the larvae of which appeared 

 in dry weather in May and June in immense numbers, destroyed 

 sugar-beet and red beet everywhere, especially in Jutland. Pegomyia 

 hyoscyami ( .4 nthomyia conformis) also did much damage in southern 

 Denmark. Phorhia (Chortophila) brassicae destroyed 90 per cent, of 

 the cabbages in certain localities ; and Phyllotreta nenwrum, P. atra 

 and other flea-beetles attacked rape in immense numbers, especially 

 in the dry early summer, and also crucifers in gardens. Brevicoryne 

 ( Aphis) brassicae destroyed cabbages in gardens in late summer, 

 especially where manure had not been used. Meligeihes aeneus and 

 Ceulhorrhynchus assiniilis did much damage in rape and turnip fields 

 in early summer. Perrisia {Cecidomyia) brassicae was very numerous 

 and did much damage to turnips cultivated for seed. Cassida nebulosa, 

 Pier is larvae, Plutella maculipennis [criiciferarum) , Eurydenia oleracea 

 and Aphis rumicis (papaveris) were minor pests of these crops. 



Carrots were especially attacked by Psila rosae, and in som.e localities 

 95 per cent, of the crop was rendered unfit for human food. Trioza 

 viridula also did so much damage that in some places the cultivation 

 of carrots had been abandoned. 



Celery was infested with the mines of Acidia heraclei. and potato 

 pests included Calocoris bipunctatus, Silpha opaca, Hydroecia micacca 

 and Apamea testacea. 



Sitona lineata, Hypera [Phytonomus) variabilis, Apion apricans 

 and Bryobia sp. occurred on lucerne and clover, and Hadena secalis 

 and Oligotrophus alopecuri on fox-tail grass. 



Apple and pear pests included : Cheimatobia brmnata, C. boreata, 

 Argyroploce (Olcthreutes) variegana, Eucosma ocellana, Hyponomeuta 

 malinellus, Diloba coeruleocephala, Malacosoma neiistria, Anthonomus 

 pomorum, Psylla mali, and the bugs, Calocoris sp., Lygits sp. and 

 Atractotomus idmi. Aphids and scale-insects {Lepidosaphes vlmi) 

 only appeared in small numbers. Cydia {Carpocapsa) pomonella was 

 not numerous in the fruit, but Argyresthia conjugella was common 

 [R.A.E., A, ix, 195]. 



Hoplocampa fidvicornis did much damage to plums, and the Aphid?, 

 Myzus cerasi and Hyalopteriis pruni, were minor pests of stone fruits. 



Raspberries were attacked by Anthonomus rubi. By turns tomentosus 

 and Otiorrhynchus sp. 



Gooseberries, currants and black currants suffered from attacks 

 of Pteronns ribesii, Pristiphora pallipes {appendicidatus) , Cheimatobia 



