Varroa Mite & Beetle

Images made through a microscope. All subject types.

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NikonUser
Posts: 2690
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Varroa Mite & Beetle

Post by NikonUser »

A neighbor gave me a jar of these Eastern Ash Bark Beetles (Hylesinus aculeatus) for ID. Apparently there were hundreds on the windows of the garage where they stored firewood. The beetles were dead having been "RAID-ed".
A couple of beetles had a a couple of Varroa Mites attached to the elytra, anchored by the blue thread at their rear end.
These mites are parasites on insects and one species is especially damaging to honey bees.
Mite: BHS 10x SPlan Apo + 1.25x intermediate lens + 2.5x NFK relay lens; polarization 6µ frames, ZS PMax.
Image
NU12067
Image
NU12068
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Mitch640
Posts: 2137
Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

The second image is excellent. Is it a scale bug? And is the blue thread excreted when it needs it?

The Emerald Ash Borer is causing a lot of damage down here. Maybe a parasite needs to be introduced to them.

NikonUser
Posts: 2690
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Post by NikonUser »

Thanks Mitch.
Not a scale bug but a Varroa Mite.
That blue thread (colourless under BF) is used to attach the mite to the host.
It is actually longer than shown, I had to break it to remove the mite from the beetle. You can see it as a white thread in the beetle image. It is a really tough thread.
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Mitch640
Posts: 2137
Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

I should have said a scale 'type' bug. I mean it looks like it can pull itself down tight to the host like a ladybug does.

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