REPORTS. 321 



Nursery, for further information, he stated that he had 

 looked for the insect before, but never actually saw it until 

 this year, and then in only two gardens where pear trees had 

 been growing for ages. Not a trace of it was seen in the 

 nursery. The pear crop has suffered from this pest more in 

 Jersey than in any other place in the British Islands. 



The life history of the insect is briefly as follows : — The 

 parent, a small fly, oviposits in the pear blossom as soon as 

 the petals show themselves ; a dozen or more eggs are laid, 

 from which the larvae quickly hatch. These immediately 

 begin to eat their way towards the centre of the embryo 

 pear, which, by reason of the irritation, increases rapidly in 

 size, ultimately splitting open and falling to the ground. 

 The larva? pupate in the ground, appearing as perfect flies 

 during the spring of the following year. 



The Water Spider, Argyroneta aquatica, which has 

 never before, to my knowledge, been recorded for the 

 Channel Islands, has been discovered by Mr. Marquand in 

 great numbers in two quarry pools at the Vale. 



A list of the Insects of Herm and Jethou has been 

 read before the Society, and will be published in the 

 present Transactions. 



ADDITIONS TO THE GUERNSEY LIST. 

 LEPIDOPTERA. 



Lithosia caniola, Hb. Several specimens bred by Mr. Baker from larvse 



found on cliffs near the Grouffre. 

 Geleehia Hermanella, F. One specimen captured by Mr. E. D. 



Marquand during August at L'Ancresse Common. 



COLEOPTERA. 



^Epus Robinii, Lab. One specimen taken by Mr. E. D. Marquand at 

 Grand Havre, Vale, on the shore at about mid-tide level. Mr. Marquand 

 says he has been on the look-out for this species for many years. 



HYMENOPTERA-ACULEATA. 



Pompilus plumbeus, Fab. Several captured by Mr. Marquand on 



L'Ancresse Common. 

 Ammophila hirsuta, Scop. Two female specimens captured by Mr. 



Marquand at the Vale. 

 PPOSOpiS brevieornis, Nyl. Taken by Mr. Marquand at L'Ancresse. 

 Halietus ZOnulus, Smith. Several specimens of this addition to the 



Channel Islands fauna taken by Mr. E. D. Marquand at L'Ancresse in 



August. 



CHRYSIDIDiE. 



Hedyehridium integrum. Taken in a sand pit on L'Ancresse Common 

 by Mr. Marquand during August. 



