Askew, R.R. 1965, The biology of the British species of the genus Torymus Dalman associated with galls of Cynipidae on oak, with special reference to alternation of forms. Transactions of the Society for British Entomology
16:217-232
[ Parasitoid orignally identified as Torymus nigricornis (sensu) Boheman, a misidentification of nitens Walker (see Boucek & Graham, 1978:227). ]
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