Diptera.info :: Identification queries :: Diptera (adults)
 Chaoborus ? Which one, if possible ?
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| Dimitri Geystor |
Posted on 24-08-2017 09:33
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Member Location: Posts: 43 Joined: 03.03.05 |
Hello, Location : S-W of France countryside, hilly agricultural area. Our property is on a rather dry slope, with no water (ponds or ditches) in immediate proximity. I was rather surprised to see these tiny (6-7 mm) diptera coming up to a UV lamp. Here are two photos for determination (July 8 and 24, 2017). The male has lost two legs...The images are clickable for enlargement. Thank you for your help.   |
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| Tony Irwin |
Posted on 24-08-2017 16:35
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 Member Location: Norwich, England Posts: 7316 Joined: 19.11.04 |
I think these are Chaoborus obscuripes, but would prefer to see a specimen to be sure.
Tony ---------- Tony Irwin |
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| Dimitri Geystor |
Posted on 24-08-2017 18:37
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Member Location: Posts: 43 Joined: 03.03.05 |
Thanks Tony, You're comforting my own inkling (for what it's worth). Sure enough, the two specimen on the photos are gone. However, a couple of days ago, there was a hot spell and quite a number of the same came up to the lamp. If you seriously wish to see one (or more), tell me how I should proceed. 70% alcohol and microtubes I have, and I would also need your postal address.  Regards, Dimitri |
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| Jorn R Gustad |
Posted on 26-08-2017 21:46
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Member Location: Averøy, Norway Posts: 166 Joined: 26.12.11 |
Dimitri, this was two very nice photos of very nice specimens! I have two questions which are a bit off the species topic: 1) How do you save your images to get this "large" size 2) How do you manage to get two picture in one adding/message Cheers Jørn |
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| Dimitri Geystor |
Posted on 26-08-2017 22:20
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Member Location: Posts: 43 Joined: 03.03.05 |
Hi Jørn, Simple if you use Photoshop (or some equivalent image treatment software. 1) In Photoshop, in the Image menu, choose the Image size sub-menu. If you choose 2500 pixels, that is a quite large image. Of course, your original image should be at least that large. Now, you have to Save the image file. Give it a name, choose a place in your computer where you would like it to go, save it as a JPEG file. During the saving procedure, you will be prompted to choose an Image weight (not Size).It ranges from 0 (poor quality) to 10 (excellent). 3 to 7 gives a reasonably good quality for a display on screen. 2) The second question is a bit more delicate. You first have to load your images on a server, and get their url. When this is done, in your post, choose the image icon, click on it and insert the image url. You can repeat that for several images in the same post. Hope to have been of help, Dimitri Edited by Dimitri Geystor on 26-08-2017 22:22 |
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| Tony Irwin |
Posted on 02-09-2017 22:19
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Member Location: Norwich, England Posts: 7316 Joined: 19.11.04 |
Dimitri kindly sent me some specimens which proved to be Chaoborus flavicans, and I think these pictures are also of flavicans. As a rule, flavicans occurs in large bodies of water, so these are likely to have travelled some distance.
Tony ---------- Tony Irwin |
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