292 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
these I discovered, for the first time, a single mite (P. ribis) actively 
walking among the flowers. This was in 1893, on the 22nd of the month. 
This specimen had the extremities of the body reddish-brown with a paler 
centre, showing a marked contrast in colour with those found inhabiting 
the interior of the buds. I have never since succeeded in finding another 
example of this form, but have found type forms wandering over the 
leaves at other times. 
Eggs. — On March 22, 1898, 1 found considerably more eggs than mites 
in certain buds from Woburn. 
April. 
Mites. — About the beginning of the month they seem to reach their 
maximum in numbers. On the 19th, in 1893, and on the 25th of the 
month, in 1898, I observed a number of buds from Chester and Woburn 
respectively had become black and dried up. In these buds there were no 
trace of living mites, but thousands of their dead white and partly 
desiccated bodies covered the surface of the dead leaves in the interior of 
the buds. But I found no dead mites in any of the buds which were 
living. On April 22, 1898, I also found several examples on the young 
leaves. They were active, but of the typical form and colour. 
Eggs. — Present in considerable numbers. 
May. 
Mites. — On the 19th, in 1893, I made the following observation : 
Examined fifty of the old infested buds which had been sent to me from 
High Legh, Cheshire, by my friend, Mr. A. T. Gillanders. Ninety per 
cent, of these buds were dead and dry — a few only having their basal 
portions with any life in them. In the latter were many mites which, 
judging from their condition, had but recently died, as they still retained 
their form and colour as in life. Those buds which had quite dried up 
gave the same results as stated in the previous month. No mites could 
be found on any other part of the infested bushes, viz. in the newly formed 
buds, behind the leaf-stalks, the leaves, or the bark. 
Eggs. — As observed in April. 
June. 
Mites. — At the beginning of the month very few of the old diseased 
buds were found to retain any vitality ; but those of them which did were 
swarming with living mites. 
On the 2nd of the month, in 1893, 1 noted the newly formed shoots had 
begun to harden, and the basal buds had then attained a length of 2-50- 
3 mm. long, but only just protruded from the base of the leaf-stalk. 
Between the latter and the buds at the ends of the young shoots I found 
adult mites and nymphs, but no eggs. • 
Eggs. — Present in the old buds. 
July. 
Mites. — Still found living in the old buds retaining vitality as noted 
in the previous month. 
On the 27th of the month, in 1893, I, for the first time, found a few 
mites insids the newly formed buds. Again, in 1899, on the 18th, I found 
