Hubert M, Morris 151 



Coleoptera. 



The family Staphylinidae was quite the lies) represented, l)oth in point of species 

 and of actual numbers, the commonest species being Atheta (Homalota) aiialis Grav. 

 A few species such as BrachypU rv s urticae Fa b., Phyllobius urticae De G. and Caeliodes 

 quadrimaculatus L. occurred especially on or near the patches of Urtica dioica. 



"Wireworms," the larvae of Agriotes obscurus L. occurred vrery frequently, 

 especially in the rougher parts of the field. 



The presence of the Scarabaeidae, both adults and larvae, and of the Hydrophilidae 

 was probably due to the patches of dung about the field owing to its having been 

 grazed by cattle and horses. 



Apion virens Herbst. and Sit ones puncticollis Steph. occurred abundantly in the 

 parts of the field in which clover was present. Larvae and pupae of the latter species 

 were taken at the roots of clover, the larvae of the former probably occurring in the 

 same situation. 



The single specimen of Phyllotreta undulata Kuts., which was obtained, had prob- 

 ably wandered from one of the fields of swedes hi the neighbourhood, the nearest 

 being at the east end of field C (Fig. 1). 



Diptera. 



Larvae belonging to the family Mycetophilidae were frequently met with in the 

 soil, where they sometimes occurred in masses. In one sample of soil 107 Mycetophilid 

 larvae were met with, in another 58 were found. 



Larvae of the family Bibionidae also occurred in large numbers, but not so fre- 

 quently as was the case with the Mycetophilidae ; on one occasion 49 larvae of Bibio 

 Johannis L. were found in a single sample of soil, and on another occasion 464 larvae 

 of a species of Bibio. 



Tipula oleracea L. and T. paludosa Mg. were fairly numerous but their larvae were 

 not met with very frequently. 



Anthomyidae were numerous, especially in the adult state. 



Hymenoptera. 



Of the Tenthredinidae which occurred, the most plentiful belonged to the genus 

 Dolerus. Selandria serva Ste. also occurred several times. 



A fan number of parasitic Hymenoptera were taken, usually in the adult state 

 a specimen of Amblyteles armaiorius Forst. was, however, reared from a pupa of 

 Triphaena pronuba L. 



The following are the hosts which have been recorded for the different species of 

 parasitic Hymenoptera (vide Morley 1903-1914): 



Atractodes gilvipes Hlgr.; recorded from larvae of Acidalia marginepunctata Goze. 



Atractodes vestalis Hal. ; host not recorded. 



Mesoleius aulicus Grav. Bred in Europe from Nematus fulvus, Selandria ovata, 

 Chul ins- viminalis, Lophyrus piniTLi. 



Platylabus dimidiatus Grav. Bred from Depressaria heracleana and D. depressella 

 on the Continent. In this country it has been bred from Melanippe fluctuata and 

 M. montanata. 



Phygadeuon fumator Grav. Bred from Mamestra brassicae, probably preys mainly 

 on Anthomyidae. 



