Skip to content

Posts tagged ‘hymenoptera’

Bombus pascuorum

Common carder bee, bombus pascuorum, male

Bombus pascuorum – Male

My favourite bumblebee at the moment is also our commonest, the Common Carder Bee Bombus pascuorum. The photo above shows a particularly handsome, well-marked, somewhat foxy-looking male. Male bees can be handled safely in the field, like this, if held very gently, but if you are in any doubt as to the sex, don’t do it.

This is a species that can vary enormously in appearance and size, in all castes, with some female workers being very tiny indeed. For me this is part of the fascination. Pale-haired specimens can be confused with the rarer carders B. humilis or B. muscorum and may need determining (particularly males) using genitalia extraction. To get to species (useful if you are collecting scientific data) its often necessary to key out a specimen under a stereomicroscope.

For a while now I’ve been thinking I really ought to focus on one group of insects. I really love beetles, Coleoptera, but I don’t find as many as I should. It seems of late that the Hymenoptera (Bees, Ants and Wasps) seem to have chosen me, especially the Bees. This is partially due to where I live, right on the edge of Salisbury Plain – a huge open area of ancient flower-rich grassland and the fact that the Plain holds some particularly rare examples like the Shrill Carder Bee Bombus sylvarum, the Armed Nomad Bee, Nomada armata and the Sainfoin Bee Melitta dimidiata.

But it’s a tough group and as indicated earlier a lot of bees aren’t identifiable beyond family in the field.

Yet in many respects identifying bees, at least in the UK, has just got a tiny bit easier with the long-awaited publication of a Field Guide to the Bees of Great Britain and Ireland by Steven Falk and Illustrated by Richard Lewington. This is the first major work on bees since The Hymenoptera Aculeate of the British Islands by Edward Saunders in 1896.

More info about naturalist Steven Falk and his new book here.

Leucospid wasp

Parasitoid wasp, Leucospis gigas, female

Leucospis gigas – female

Earlier this year I enjoyed a short break on the Greek island of Kefalonia. I took quite a few photos of insects, many of which I have still to identify. Needing help I uploaded this image of a wasp to the Hymenopterists Forum on Facebook. Almost immediately Irenel E. Popescu came back suggesting it might belong to the Leucospidae, a small specialised group of ectoparasitoid wasps within the Chalcidoidea superfamily.

Using this as a starting point, and after a further trawl of images on the internet, I concluded that it was most likely the Parasitoid Wasp Leucospis gigas.

Read more