jeremyr's picture

Brachyopa bicolor

Observed: 26th May 2013 By: jeremyrjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebratesjeremyr’s reputation in Invertebrates
1
left antenna
4
scutellum
Description:

A bright orange fly that appeared in a shard of sunlight in the woods - I thought this was a small R. rostrata with no snout
My Hoverflies

Identifications
Species interactions

No interactions present.

Comments

jeremyr's picture

dusting

from these images it appears that the scutellum is 'all-yellow' but in fact it does have a slight grey dusting extending from the front to about midway

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Roger Morris's picture

Scutellum

The scutellum looks to me not to be grey-dusted but a close-up would help. Be careful about the pit on the antenna - I have found that some B. scutellaris are very deceptive.

The critical issue to start with is whether the antennae are pilose or not.

jeremyr's picture

arista

at x100 I would describe it as 'short pubescent'. Using Stubbs' two illustrations on p.130 as a guide it's shorter than the pubescent drawing and slightly longer than the length shown on 'almost bare', however it runs consistently the whole length of the arista and there are no actual bare areas.

Also at x100 the 'pit' on the 3rd antennal segment looks indistinct

Edit: here is a posting which includes an image of the arista:

http://www.dipteristsforum.org.uk/t3140-Brachyopa-scutellaris.html

The hairs on my fly are much shorter, this one on DF is positively plumose in comparison.

I've also added two images of the scutellum, which may or may not show apparent partial dusting when viewed close-up

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latest pics and diptera videos