jeremyr's picture

Borophaga incrassata

Observed: 17th August 2013 By: jeremyrjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebrates
Borophaga incrassata
Borophaga incrassata 2
Description:

A large Scuttle fly that apparently parasitises Bibio marci. The specimen was taken and examined under a microscope

Identifications
Species interactions

No interactions present.

Comments

Joe Botting's picture

Interesting

Thanks for posting this one, Jeremy - I've never tried keying a scuttlefly, so it's good to hear what sort of features are useful to look at. :o)

jeremyr's picture

key

Hi Joe,

Good magnification needed, looking at flattish rows of fine black hairs on a black tibia - they're not too bad so long as the genus isn't Phora, then it's a slide-mounted epandrium and so on, and a Deplonevra I keyed to genus needs the hind leg mounting to go further. Otherwise less scary than I'd thought, and the raised ocellar area is hilarious.. most unusual

I'll try and get some close-ups of some of the features and add them

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ophrys's picture

Parasitism

My copy of Disney (Handbook 10.6 p.19) says that the larvae of Borophaga incrassata parasitize the larvae of Bibio marci.

Ian
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jeremyr's picture

Bibio

- as does my copy also (1983).

On another page it says 'Widespread in lowlands of England'. The scant nbn pattern of what must be a very under-recorded species does suggest a southern bias

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ophrys's picture

Bees?

Where does the reference to parasitising honey bees come from...a different book?

It is recorded from Yorkshire, but not VC61 and I don't recall seeing one here.

Ian
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My Flickr photos...

http://www.flickr.com/photos/52163027@N02/

jeremyr's picture

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