58 PULVIXAIIIA VITIS, YAK. KIBESIJE. 



(Mosley and Parkin, from whom I have also fre- 

 quently received specimens) ; Macduff, Banff shire, 

 N.B. (Cruikshank) ; Glenmuick, Ballater, Aberdeen- 

 shire (M'Kenzie) ; Stonehaven, Kincardine (Sim) ; 

 Edinburgh City ; Arbroath ; and Berwick-on-Tweed 

 (Norman). It is very common in Cheshire, often 

 occurring in town gardens on wall-trained trees in such 

 numbers as to almost cover the main branches ; and I 

 have found it equally common in a garden near Bangor, 

 North Wales. It has been forwarded to me from the 

 neighbourhood of Liverpool (Miss Wood, Dr. Green) 

 and of London (H. J. Turner). Mr. F. V. Theobald* 

 has also found it in abundance in Huntingdonshire. 



Mr. Douglas (1. c.) gives Pt/rns aucuparia as an 

 additional food-plant ; but I believe the specimens 

 were not examined microscopically, so that it is doubt- 

 ful if they were really this variety or typical P. vitis. 



Distribution. Signoret states that he found the 

 species at Clarmart and Chambery in 1871, and Dr. 

 Goethe records it from the Rhine country. 



Habits. The young larvae, or "lice," as they are 

 sometimes called, begin to hatch early in June, and 

 continue to do so until the end of the first week in July, 

 a period of about twenty-eight days. They are very 

 active for a day or so and disperse over the food-plant, 

 ascending freely to the leaves and young and tender 

 branches, but very rarely indeed fixing themselves in 

 such situations. They almost invariably select the 

 hard, ripened wood of the previous year's growth. On 

 warm, sunny days they begin to hatch as early as 

 8.30 a.m., and greater numbers are apparently then 

 produced than during the heat of the day. Very little 

 change takes place in the larvae when they first fix 

 themselves to the food-plant ; but in the middle of 

 July they undergo their first moult. The effete skin is 

 cast off at the anal extremity, where it may be seen 

 attached to the bark as a minute, dusky-white object. 

 At the end of the second week in August another moult 



* 'Kept. South-Eastern Agr. Coll., Wye/ 1902, pp. 2-4, fig. 1. 



