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Photo#95255
Allograpta obliqua? - Allograpta obliqua - female

Allograpta obliqua? - Allograpta obliqua - Female
Fullerton Arboretum, Fullerton, Orange County, California, USA
February 11, 2007
I think I have this right, but have muffed ID on this one a couple of times. It puzzles me how few A. obliqua we have posted, as this is a common syrphid here, along with Toxomerus.

It's interesting to me how the blue shows up in the thorax sometimes and not in others. (It's more evident in the second photo.)

(Written later: The blue is an artifact, very common in syrphid images, particularly this and Spaerophoria.)

Images of this individual: tag all
Allograpta obliqua? - Allograpta obliqua - female Allograpta obliqua? - Allograpta obliqua - female Allograpta obliqua? - Allograpta obliqua - female

I just noticed what you said about the blue
on the thorax. I think what we are seeing is areas with less dark pigment. It does look like there are stripes. Instead of one solid color, what I see is three darker vertical stripes (one center, and one to either side)alternating with two less colored areas).

What makes it confusing is that the lighter colored areas seem to be semi-transparent.

In the first picture the angle of view is oblique, and this allows a very nice mirror like reflexion. It actually seems like you can see the landscape in the reflection (I magnified it 4x for a closer look). In the other two you are looking close to straight down hence the more milky appearance of looking into the semitransparent layer itself.

Are these stripes? It would be easier to say if one could see them from many different angles.

 
Sometimes the stripes are very pronounced
but this is not typically the case.


BTW, your eyes are a lot better than mine.

 
LOL - I doubt that!
Still, it is true that I enjoy examining images a little more than most. Ironically, I think it is because my actual vision is so poor that I like to examine macro photographs. They give my eyes a new lease on life!

Nice shot of the wings especially!
These syrphid flies are awesome!

 
Thanks, Mac
I'm very aware of wing veins and aim to contribute many shots of them.

 
Well, you have helped to make me aware of their
value identification. When I took the pictures for my recent submission which you identified for me, I was struck most by the shape and flexibility of the abdomen, and the distinctiveness of the markings. After looking at your pictures I am encouraged to double check my archives for a better view of the wings!

You got it right... It is a f
You got it right... It is a female of A. obliqua! Nice shot..

 
Thanks, Martin, for the confirmation and the compliment.
New camera makes a big difference. Oh, and thanks for the move, too.

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