<i>Bombus</i> (<i>Psithyrus</i>) <i>vestalis</i> Britain, Legend : A- Female B- outer side of hide leg
David Sharp (1840 – 1922)
The Cambridge natural history -- Vol. 6. [1901] Insects (pt. 2)  by David Sharp <a rel="nofollow" class="external text" href="https://biodiversitylibrary.org/page/19521436">Page book</a>