lxxii PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



with the proper performance of their functions by the presence of a 

 complete covering of the alga Pleurococcus vulgaris on their upper 

 surface. 



Diseased Cucumber Leaves. — Mr. Massee, V.M.H., reported that the 

 leaves sent by Mr. Terry were attacked by the fungus Cercospora melonis, 

 Cooke. 



Baspberry Moth. — Mr. Saunders, F.L.S., reported on some shoots of 

 Raspberry in which the buds had failed to grow : — " The buds on the 

 raspberry were attacked by the caterpillars of a small moth, the ' rasp- 

 berry-moth,' Lampronia rubiella. Any of the canes which are badly 

 infested should be cut out at once and burnt ; if only a few buds are 

 affected they should be picked off and treated in the same way ; in doing 

 this, however, be sure that the grubs are not left in the cane. The moths 

 lay their eggs in the flowers of the plants, and the young caterpillars 

 make their way into the core of the fruit, where they do not appear to do 

 any harm. Later on they let themselves down by silk threads, or crawl 

 down, to the stool of the plant, where they hide among dead leaves or 

 rubbish, in cracks of the soil, or in some inequality in the bark of the 

 canes, &c. Each then spins a thin silken cocoon round itself, and in this 

 position passes the winter ; in March, earlier or later according to the 

 season, they leave their winter quarters and crawl up the caries and make 

 their way into the base of the buds. When fully grown they form a 

 chamber in the pith of the cane, in which they become chrysalides, from 

 which the moths emerge in about three weeks. During the winter the 

 stools should be thoroughly cleaned, and all rubbish, dead leaves, &c, 

 carried away and burnt. They should then be earthed up, which should 

 prevent any caterpillars still in the stools from ascending the canes, the 

 bases of which should be painted with a thick solution of paraffin 

 emulsion as a further safeguard." 



Scale on Cotoneaster. — Mr. Saunders also reported on insects on 

 Cotoneaster sent by Mr. Bunyard : — " These are badly attacked by the 

 ' mussel-scale (Mytilaspis pomorum), and to a less degree by the 'brown 

 peach-scale ' Lecanium persiccB var. Sarothamni. I should cut out as 

 many of the infested branches as can be spared, and then, towards the end 

 of May and again early in June, spray with paraffin emulsion, taking care 

 that the insecticide reaches the back of the shoots that are against the 

 wall ; another spraying might be given with advantage about the middle 

 of June. The particular reason for spraying at this time of year is to 

 destroy the young insects as soon as they begin to leave the shelter of the 

 scale of their mother and to find fresh quarters for themselves. If it 

 were not an evergreen plant, I should recommend spraying with a caustic 

 alkali-wash in the course of the winter, but a good spraying with paraffin 

 emulsion then could not be otherwise than beneficial, and it would prove 

 more efficacious if the plant were protected by a mat afterwards, to prevent 

 the insecticide being washed off by the rain." 



Neiv Primulas. — The following newly introduced primulas from 

 Western China were exhibited by Messrs. J. Veitch & Sons : — Primula 

 vittata, Bureau et Franchet ; P. deflexa, Duthie ; P. nivalis farinosa, 

 Schrenk ; and P. Cockburniana, Hemsley. On the motion of Dr. Masters, 

 seconded by Mr. Douglas, a Botanical Certificate was unanimously awarded 



