205 



Among the more important foreign species found during recent 

 years are GryUotalpa gnjllotalpa, L. (European mole cricket) in a rose 

 garden. The infested area has been examined for the past two years 

 and the nests destroyed during June and July, and by this means 

 the pest has been kept down to comparatively harmless numbers. 

 The presence of Monartkropalpus buxi, Lab. (boxwood leaf-miner) 

 has necessitated the destruction of many plants in nurseries. 

 Rhijacionia {Eretria) buoliana, Schifi. (European pine-shoot moth) 

 caused infested shoots to be cut off and destroyed until the infestations 

 were eradicated. Gracilaria zachrysa, Meyr. (azalea leaf-miner) is 

 generally confined to azaleas in greenhouses. Spraying with lead 

 arsenate and fumigation with tobacco extract has afforded fair control. 

 Plagiodera versicolor, Laich., feeds on the foliage of poplar and willow 

 and is readily controlled by arsenicals. Popillia japonica, Newm., 

 which is a pest of grape, beans, peas and peanuts in Japan, has been 

 foimd on roses, ampelopsis, grape, elder, Crataegus and button bush, 

 being probably imported in the soil round iris roots from Japan. 

 The sawfly, Diprion simile. Hart., is controlled by lead arsenate 

 sprays, and appears to have an efficient parasite in Monodontomerus 

 dentipes, Boh. Trioza alacris, Flor (laurel psyllid) has been intro- 

 duced from Belgium. The nymphs curl the leaves and spoil the trees 

 for ornamental purposes. Fumigation Avith tobacco smoke should 

 be carried out during the winter while the trees are in storing sheds 

 and the adults are hibernating. Stephanitis pyrioides, Scott, a lace- 

 bug injurious to evergreen azaleas, became widely distributed in New 

 Jersey before its presence was discovered. It is being sprayed with 

 whale-oil soap after the eggs have hatched. 



The weevils, Acythopeus orchivora, Blackb., Cholus caUleyae, Champ., 

 Cholus forbesi, Pasc, Diorymellus laevimargo, Champ., and two 

 undescribed species have all become established in orchid houses. 

 These are natives of tropical America and very little is known of their 

 life-histories. Hand-picking or destruction of badly infested parts 

 is practised. Magdalis barbicornis, Latr., is established in New 

 Jersey, New York and Massachusetts. It is known as the apple 

 stem piercer and is likely to attack apple, quince and medlar trees. 



Sasscee(E. R.).1 Important Foreign Insect Pests collected on Imported 

 Nursery Stock in 1917. — Jl. Econ. Entom. , Concord, N .FI ., xi, no. 1, 

 February 1918, pp. 125-129. 



The pests intercepted include : Egg-masses of Lymantria {Porthetria) 

 dispar (gipsy moth) from Belgium and France ; a nest of Nygmia 

 phaeorrhoea {Euproctis chrysorrJioea) (browai-tail moth) on apple from 

 France ; larvae of Arctornis chrysorrhoea, L. {Porthesia similis, Fuessl.) 

 (gold-taii moth) on rhododendron, laburnum and roses from Holland. 

 As this latter insect is a general defoliator of forest trees in Europe, 

 it is of the greatest importance to prevent its estabhshment in the 

 States. Nests of the butterfly, Aporia crataegi', L., were found on 

 deciduous fruit-tree seedlings from France. Larvae of Acronycta 

 rumicis, L., have been collected on rose stock and Cornus from France 

 and azaleas from Belgium ; Trioza alacris, Flor (bay psyllid) was 

 reported on Belgian bays, and Psylla buxi, L. (box psyllid) and Monar- 

 thropalpus buxi, Lab. (box leaf-miner) on boxwood from Holland ; 



