Saturday
May212011
Sawfly

A black and yellow sawfly, probably Macrophya monatana (Hymenoptera: Tenthredinidae).
Photos taken in the field below Chazey Wood, near Caversham, UK, on 2011-05-09.
Update on Sun 2011-06-05 by
Tristram Brelstaff

This is a female; the males of Macrophya montana are almost all black.
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