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parasite/mite?

 
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sam smith



Joined: 15 Sep 2009
Posts: 19

PostPosted: Tue Dec 29, 2009 8:42 am    Post subject: parasite/mite? Reply with quote

Going through last summers pictures I came across this, any ideas on what sort of parasite/mite is attached?
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John O'Sullivan



Joined: 05 Oct 2005
Posts: 128
Location: Sandy, Bedfordshire, UK

PostPosted: Fri Jan 01, 2010 12:06 pm    Post subject: Reply with quote

Happy New Year Sam, and all!

You are, I believe, right in thinking that this is a mite. These red "blobs" are a regular, though infrequent, sight on hoverflies and other insects, and I suppose many of us must have wondered what they are called. A quick trawl around the web suggests that the genus might be Trombidium and the species perhaps breei (which is certainly known to affect butteflies in the UK). However, things in the world of mite identification are probably far from straightforward! Perhaps another reader on this Forum will be able to advise on the correct name.

It does seem from the little I have read that such mites do no harm to the flies, and I have never seen a hoverfly trying to rid itself of one, for instance.

The hoverfly in this case seems to be a female Eupeodes corollae.

Regards,

John
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sam smith



Joined: 15 Sep 2009
Posts: 19

PostPosted: Sat Jan 02, 2010 8:47 am    Post subject: Reply with quote

John
many thanks for you opinion, it is strange how the mite is not segmented or appears not to have have any legs.

Thanks for your reply

Sam
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anymarks



Joined: 24 Jan 2010
Posts: 25

PostPosted: Mon Jan 25, 2010 6:02 pm    Post subject: Reply with quote

Hello Sam

I posted on a similar topic last year to The Dipterists Forum

http://www.dipteristsforum.org.uk/t395-Hoverfly-parasite.html

Like you I was struck by the absence of segmentation, legs, mouthpiece etc.. These are NOT the adult red mites with which I am familiar - from bees & beetles to butterflies & moths.

I kept the one which I found after it had detached from the host (Syritta pipiens) in warm, moist conditions but it stubbornly refuses to look like anything but an amorphous red blob !

I am persuaded that these are egg cases containing a parasitic larva which will then detach itself to continue it's development in the case before emerging as.....?

Hopefully I will be able to rear something on this coming season

Regards
Neil
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sam smith



Joined: 15 Sep 2009
Posts: 19

PostPosted: Tue Jan 26, 2010 7:40 am    Post subject: Reply with quote

Neil
Many thanks for your reply, please let me know if you have any luck with the egg case, I find the whole thing fascinating.

Thanks again
Sam
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