1 80 [June. 



defined : each Avith two stout conical spines, several fine hairs, some conspicuous 

 circular pores, and a terniiiial seta which is approximately equal in length to 

 those of the anal ring- (see fig. 5). Margins of segments, each with a small 

 protuberance, bearing similar spines, pores and hairs, all of which become 

 smaller and less conspicuous as they approach the anterior extremity. Derm 

 with scattered, small, and inconspicuous pores. Many longish stout hairs on 

 under-siirface of head. Length, 2.50 to 8 mm. Breadth, 1.25 to 1.50 mm. 



Adult male similar in appearance to that of Ps. citri. Length, 1.50 mm. 



Tbougli the structural characters agree somewhat closely with 

 those of citri, the general appearance of the living insect is strikingly 

 different, and it is of a much more active habit. 



Collected by Mr. C. J. G-ahan, on Bibes sangidnea, in London: 

 May, June. Males were on the wing in June. (Under date 20.iii.l915, 

 Mr. G-ahau writes that he has just found two females — one nearly 

 full grown — on the Ribes in his garden. This suggests that the 

 insects must exist through the winter, in the open) . 



Mr. Gahan observes that the insect, when irritated, exudes " a 

 claret coloured liquid in round drops, two close to the head end and 

 two at the tail end." The exudation evidently emanates from the 

 glandular pits that are present in the positions indicated. He further 

 remarks that the " dark-coloured secretion soon dries, looking like a 

 small balloon. The liquid hardens into a solid substance which 

 resembles lac or something of a similar nature." 



Phenacoccus aceris Sicfni 



This species was abundant on gorse stems in Cambei-ley during 

 the summer. The insects were fully developed by the middle of June, 

 shortly after which date affected trees were ccnspicuous from a 

 distance by reason of the masses of snowy white ovisacs. When 

 constructing their ovisacs the insects often stray from the plant upon 

 which they have been feeding and establish themselves upon the 

 surrounding undergrowth, and even upon dead wood and pahngs. 



Cryptococcus fagi Baerensp. 



This Coccid is to be found upon every beech tree in the neighboixr- 

 hood of Camberley. I have seen trees in the woods the trunks of 

 which appeared, at a little distance, to have been thickly coated with 

 whitewash. In some places the insects and waxy deposit were massed 

 to a depth of nearly an inch, harboiiriug numerous Hemerobiid, Psocid, 



