BeckyJ's picture

Oil Beetle

Observed: 11th April 2010 By: BeckyJBeckyJ’s reputation in Invertebrates
West Wales 029
West Wales 019
West Wales 021-1.JPG
Description:
Identifications
Species interactions

No interactions present.

Comments

dshubble's picture

Meloe

Well, certainly an oil beetle - I'm wondering whether M. violaceus and M. proscarabaeus can be separated by photo as they are fairly similar,

Dave

Syrphus's picture

M. violaceus has a groove

M. violaceus has a groove across the back of the pronotum which I have persuaded myself I can see clearly in both pictures.

M.

TRY

recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.

dshubble's picture

Meloe

Hmmm... I've been looking at a couple of sources and I think both can have a groove, but the base of the pronotum is differently curved. However M. violaceus has a bump on the mesonotum which I do think is visible (just) on the left-hand pic. I shall muse some more...

Dave

BeckyJ's picture

Thanks Dave. I have added a

Thanks Dave. I have added a new photo - does this help?

Cheers, Becky

Syrphus's picture

I would make this violaceus

I would make this violaceus on that pronotum character. There is a key in 'British Wildlife' October 2002, which gives:

Pronotum with slight transverse depression at base -> violaceus.

Pronotum with no depression at base -> proscarabeus.

A couple of the pics show the typical violet colour, though not very strongly. M. proscarabeus is typically (but not always) black.

Comments from proper coleopterists welcome!

M.

TRY

recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.

dshubble's picture

oil beetle

Thanks for the extra pic Becky, and for the comments Syrphus. With all the above in mind, I (finally) agree it's violaceus,

Dave

Rose's picture

Oil beetle survey

Buglife are doing an oil beetle survey and would like people to submit all records.
http://www.buglife.org.uk/NR/exeres/7F82C6A6-1063-47C2-B5C3-05904B30447B...

Rose

Darren J. Mann's picture

Meloe

The specimen looks like M. violaceus, the base of the pronotum in M. violaceus is excised (is broadly concave), behind which is a small tooth. This can be seen on the 3rd image. M. proscarabaeus does not have this character.

cheers
D

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