Diptera.info :: Identification queries :: Diptera (adults)
 male - Heterotrissocladius?
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| John Sankey |
Posted on 11-09-2012 23:28
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Member Location: Ottawa Canada Posts: 160 Joined: 24.04.12 |
the antenna scapes are quite different from any I've seen so far. Collected 9 September, Ottawa Canada length a bit less than 2 mm John Sankey attached the following image:  [66.03Kb] Edited by John Sankey on 16-10-2012 13:37 |
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| John Sankey |
Posted on 11-09-2012 23:30
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Member Location: Ottawa Canada Posts: 160 Joined: 24.04.12 |
head closeup
John Sankey attached the following image:  [59.59Kb] |
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| John Carr |
Posted on 12-09-2012 15:21
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 Super Administrator Location: Colorado, USA Posts: 10696 Joined: 22.10.10 |
In Chironomidae and related families the scape is reduced and pedicel enlarged, especially in males. This might be Orthocladiinae. I can't make out wing veins clearly. |
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| John Sankey |
Posted on 12-09-2012 16:56
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Member Location: Ottawa Canada Posts: 160 Joined: 24.04.12 |
Thanks for the clarification, John. I still haven't seen one like this before, so it must be new for me. This is the best I can get of the venation - I really should build a setup for transmitted light for it.
John Sankey attached the following image:  [29.29Kb] |
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| John Carr |
Posted on 13-09-2012 00:53
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Super Administrator Location: Colorado, USA Posts: 10696 Joined: 22.10.10 |
Eyes seem to be bare. Dorsal view of genitalia and eyes (showing size of dorsal extension) may help, but the subfamily is very difficult. |
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| John Sankey |
Posted on 13-09-2012 16:39
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Member Location: Ottawa Canada Posts: 160 Joined: 24.04.12 |
Agreed, but I did manage to figure out one of them that I had several examples of, so I'll see if MND delivers this time... |
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| John Carr |
Posted on 13-09-2012 16:47
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Super Administrator Location: Colorado, USA Posts: 10696 Joined: 22.10.10 |
Reference: Wierderholm, Torgny (Ed.), The adult males of Chiromomidae (Diptera) of the Holarctic region -- Keys and Diagnoses. Ent. Scand. Suppl. 34:1-532 |
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| John Sankey |
Posted on 30-09-2012 13:55
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Member Location: Ottawa Canada Posts: 160 Joined: 24.04.12 |
MND Orthocladiinae 90 antepronotal lobes like 33; plumose flagellae 94 venation like 12 96 eyes bare 111 no macrotricia 112 gonostylus simple 114 C distal to CuA Heterotrissocladius Also a photo of another specimen with a 40x objective I've just located (metallurgical lwd ones don't come up for sale often). There are hundreds swarming right now in the lee of my patio swing. John Sankey attached the following image:  [57.36Kb] |
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