john4352's picture

Hoverfly

Observed: 27th July 2012 By: john4352john4352’s reputation in Invertebratesjohn4352’s reputation in Invertebratesjohn4352’s reputation in Invertebrates
hoverfly Melanostoma sp. moory park IMG_1539
Description:
Identifications
Species interactions

No interactions present.

Comments

jeremyr's picture

fine black markings

I put my 'rostrata' with fine black markings (which you id-ed as rostrata Chris and I agreed) on diptera info and was told 'probably female campestris'.. anyway it stands as rostrata, and my confusion deepens. How do you tell here, size of conk? I had to ignore one this size this morning as I waited for something 'more important', though I did get a pic. Are female campestris snouts smaller then?

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chrisbrooks's picture

Limited knowledge

I have to admit my knowledge is limited. I went for R. campestris for the reason stated, bold black tergite borders. I'll have to let Ophrys answer this more fully as I'm only treading water.

ophrys's picture

Rhingia

Easiest just to refer you to Steven Falk's excellent site...

rostrata

http://www.flickr.com/photos/63075200@N07/sets/72157629849058963/

campestris

http://www.flickr.com/photos/63075200@N07/sets/72157629484682260/

If you look at those, this is definitely campestris, appearing to be extensively dark on the tergites. I don't remember your rostrata posting...I'll have a look for it.

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

chrisbrooks's picture

Link

ophrys's picture

Linked Rhingia

Certainly looks pretty pale on the abdomen, scutellum is orange, snout looks shortish, but I don't have enough experience of rostrata to call that one...you need Roger Morris to comment, I think.

Ian
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My Flickr photos...

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

jeremyr's picture

similar

the one I saw this morning was dark like this and showed a 1mm wide abdomenal black stripe running lengthways as it sluggishly flew. For a second I thought it the big cheilosia that hangs around here, definitely dark like this with a snout as big

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