Pteromalus Naubolus, 2 

 Eulophus gallarura, 10 



Bracon ? 6 



Megastigmus dorsalis, 40 

 Callimome nigricornis, 30 



Callimome ? 2 or 3 



Pteromalus Naubolus, 708 

 Pteromalus ovatus, 20 



June. 

 Megastigmus dorsalis, 5 males and 1 female 

 Pteromalus Naubolus and ovatus, 179 

 Eupelmus urozonus, 3 males and 5 females 

 Tetrastichus Diaphantes, 128 



Summary of Species and Specimens. 



Insects. 1457 



May. 



Coleoptera 



9 species. 



191 specimens and upwards 



Orthoptera 



1 



5 



Neuroptera 



2 „ 



Some hundreds 



Hymenoptera (Cynipites) 



4 or 5 species. 



30,246 specimens 



Hymenoptera (Parasitic) 



45 



24,417 and upwards 



Diptera 



3 



23 



Lepidoptera 



5 



9 



Hemiptera 



5 



51 



Arachnida and Acari 



5 or 6 „ 



A few 



Total 75 55,000 and upwards. 



All the Coleoptera, Orthoptera, Neuroptera, Diptera, Lepidoptera, Hemiptera, and 

 Aptera, with the exception of Balaninus Glandium, and Drosophila,were probably ac- 

 cidental visitors. 



Teras Quercus-terminalis is the cause of the formation of the oak-apples, in each 

 of which a great number of its larvae reside ; sometimes sixty flies or upwards emerge 

 from an oak-apple. It varies exceedingly in size, but usually all the individuals pro- 

 duced from one oak-apple are of one sex, and of the same size. Sometimes the habits 

 of the larva are solitary, and it then lives in two other kinds of galls that are formed 

 on oak-leaves. 



Synergus socialis is one of the " Inquilini," or dwellers in hired houses, as some of 

 the Cynipites have been termed. 



Pteromalus Naubolus is, perhaps, only a variety of P. semifascia. — Francis 

 Walker. 



Notes on Oak-galls. — There is a small round gall, about the size of a pea, veiy 

 abundant on oak-leaves. In February and March a species of Neuroterus emerges 

 from the galls that are attached to the withered oak-leaves on the ground, and by its 

 operations fresh galls appear on the oak-leaves in the beginning of summer, and from 

 them a new generation of flies is soon disclosed. Last year I reared from these galls 

 215 flies, of which there were 57 males and 158 females. They were infested by some 

 Chalcidites, whose time of appearance was as follows : — 



iv 5r 



