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Whoops! Looking it up now. Too much of a rush.

Vespoidae is presumably the Superfamily which means quite a lot. What book do I need?

FSC Publications
ADD TO YOUR BASKET
Scolioidea, Vespoidae & Sphecoidea
Code: 7022 Author(s): Richards Date: 1980 Price: ?8.30
http://www.field-studies-council.org/publications/pubsinfo.aspx?Code=7022

which is what I found.