ophrys's picture

Phasia

Observed: 21st August 2012 By: ophrys
Yorkshire Naturalists' Union
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phasia
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ChrisR's picture

Very dark-winged males, like

Very dark-winged males, like this, are quite unusual but I usually see one or two per year :)

ophrys's picture

Dark wings

Thanks, Chris...it had me wondering for a while, but the general jizz is pretty distinctive, isn't it? There were a few Phasia obesa and pusilla around, as well, but too hard to photo on a very windy day.

Talking of pusilla, are they easy to separate from barbifrons? I saw a suggestion somewhere that it could be done on the colour of the halteres? One I took yesterday had very pale, yellowy halteres...does that make it likely to be barbifrons? It has hairs above the antennae, but I have only one other specimen to compare it with (that does have brown halteres). Thanks for any pointers.

Edit: Had another look and it does have hairs between the eye margin and the parafrontal bristles, as well as yellow halteres, so it is Phasia barbifrons...a new one for me.

Ian
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