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NOTES ON SOME HYMENOPTEROUS PARASITES 

 BRED FROM THE PUPAE OF CHORTOPHILA 

 BRASSICAE BOUCHE, AND ACIDIA HERA- 

 CLEI L. 



By J. T. WADSWORTH, 



Research Assistant, Dept. of Agricultural Entomology, 

 University of Manchester. 



During the course of an investigation of the life-histories of parasites 

 which attack soil insects, and more particularly of the life-history of 

 Aleochara bilineata, Gyll., a Staphylinid whose larvae infest the pupae 

 of the cabbage-root fly Chortophila brassicae, the following parasites 

 were reared: 



A. From the pupae of Chortophila brassicae: 



1 . Phygadeuon fumator, Grav. 



2. Atractodes tenebricosus, Grav. (vestalis, Hal.). 



3. Cothonaspis (Eucoila) rapae, Westw. 



B. From the pupae of the Celery-fly (Acidia heraclei). 



4. Hemiteles crassicornis, Grav. (= ? subzonatus, Grav.). 



5. Adelura apii, Curtis. 



As the species numbered 1 to 4 do not appear to have been recorded 

 hitherto from these dipterous hosts, the following remarks on them 

 may be of interest. 



1. Phygadeuon fumator. Morley (Ichneum. Brit. vol. n. pp. 98-99) 

 states that this is one of the most abundant of all British insects, and 

 considering its prevalency, it has very rarely been bred. Its previously 

 recorded hosts are: Mamestra brassicae (the cabbage moth), Emphytus 

 serotinus (a saw-fly), and a dipterous puparium found in carrion. Morley 

 comments on these records as follows : " I suspect it of preying mainly 

 on Anthomyiid diptera" : and he informs me (in lit.) that he considers 

 ( lie records of the first two hosts to be erroneous. It is therefore interest- 

 ing to find his suspicion confirmed. From several hundred puparia of 

 the cabbage-root maggot I have obtained only one specimen, a female, 



