226 Insect Pests. 



body formerly fixed to the branch becomes raised up by the white 

 cushion, and in this pad the eggs are deposited, and the larvte hatch 

 in June and July. 



The great amount of honeydew secreted is very marked. 



The treatment is the same as that given in connection with the 

 Brown Currant Scale, p. 230. 



REFERENCES. 



(1) Theobald, F. V. Journal S. E. Agricultural College, No. 11, pp. 21-23 



(1902). 



(2) Newstead, E. ' Monograph of the British Coccidae,' vol. II., pp. 55-67 



(1903). 



(3) Ormcrod, E. A. ' Handbook of Insects Injurious to Orchard and Bush 



Fruits,' p. 75 (1898). 



(4) Theobald, F. V. Report 011 the Orchards and Fruit Plantations of 



Worcestershire, p. 14 (1906). 



THE BROWN CURRANT SCALE. 



(Lccanium persicw var. sarothamni. Douglas.) 

 (Lccanium ribis. Fitch.) 



The Brown Currant Scale is much more abundant in Great 

 Britain than the former species, and increases with greater rapidity. 

 Moreover, it attacks a larger number of plants. It has been recorded 

 on the raspberry, cotoneaster, Clematis, Cratcegus oxyacanthus and 

 C. pyr acanthus, Cytisus scoparius, Philadclpkus, Wistaria chincnsis, 

 Ncillia (1), on conifers, on euonymus, and on plum (6), but especially 

 on the currant and gooseberry. It has also been found on elms in 

 Denmark (5). 



The Brown Currant Scale also occurs in North America, for Fitch 

 describes it under the name Lccanium ribis. It is very injurious to 

 the young wood upon which it is often found, sucking out the juices 

 and stunting the growth of the wood. Bushes, etc., affected seldom 

 bear much fruit, and the leaves usually ripen off long before those of 

 healthy bushes. The female is yellowish-brown to rich brown in 

 colour, hemispherical in form, about \ inch in length ; slight transverse 

 markings may be seen at the edge, which when old becomes covered 

 with corrugations, and the edges much contorted. The male is not 

 known in Britain. The larva? of this scale differ considerably from 

 those of P. ribesice. Their colour is yellowish to pale reddish. 



They emit very long delicate glass-like filaments from both ends. 



The larva* wander about freely over the bushes for some time, 

 finally settling upon the young wood, when they soon become flat and 



