Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
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 Tabanidae eggs
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| Nikita Vikhrev |
Posted on 04-07-2007 13:22
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 Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
Mosc reg, 03 July, under pond. 1. Is it possible to distinguish eggs of Tabanus and Hybomitra? 2. How long should I wait for emerging? 3. In what time of a day emerging take place? Thank you Nikita Nikita Vikhrev attached the following image:  [127.31Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| Tony T |
Posted on 06-07-2007 00:02
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 Member Location: New Brunswick, Canada Posts: 662 Joined: 08.02.07 |
I don't believe you can distinguish Tabanus masses from Hybomitra masses. Don't know how long they take to hatch, don't know time of day they hatch. This batch of eggs has either hatched or has been parasitized and the parasitoids have emerged. What you are seeing are the empty egg cases. Tabanid larvae, except perhaps Chrysops are difficult to rear, They are carnivores and require living food and are also cannabalistic. Added 25 August 2007 Here is a photo of Hybomitra lasiophthalma in the act of ovipositing. Eggs are white at first and then the chorion hardens and darkens (probably within 24 hrs.) Note the large size of the multilayered egg mass, fly is about 14mm long. Also note the tiny parasitoid wasp ovipositing in an egg. 27 July 1992, New Brunswick, Canada. From a Kodachrome slide Tony T attached the following image:  [53.74Kb] Edited by Tony T on 26-08-2007 03:32 |
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| Nikita Vikhrev |
Posted on 06-07-2007 07:40
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Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
Thank you Tony, you saved a lot of my time via your reply! Nikita Nikita Vikhrev - Zool Museum of Moscow University |
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| jorgemotalmeida |
Posted on 14-08-2007 22:09
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 Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
nikita, how is the size for these egg cases?  |
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| Nikita Vikhrev |
Posted on 15-08-2007 09:51
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Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
15mm
Nikita Vikhrev - Zool Museum of Moscow University |
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| jorgemotalmeida |
Posted on 15-08-2007 10:00
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
I thought that Tabanidae had aquatic life initially... |
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| Nikita Vikhrev |
Posted on 15-08-2007 11:38
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Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
I thought that Tabanidae had aquatic life initially... Correct, eggs are on Typha, so afterwards larvae fall in pond Nikita Vikhrev - Zool Museum of Moscow University |
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| jorgemotalmeida |
Posted on 15-08-2007 15:59
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
thanks Nikita! It makes sense. I will try to seek for Typha! |
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| Tony T |
Posted on 26-08-2007 03:35
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Member Location: New Brunswick, Canada Posts: 662 Joined: 08.02.07 |
new imaqge added, see above and this one showing a batch of mostly healthy unhatched eggs 15 June 1978, New Brunswick, Canada. From a Kodachrome slide. Tony T attached the following image:  [43.37Kb] Edited by Tony T on 26-08-2007 03:48 |
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but don't see the image in the post.