Diptera.info :: Identification queries :: Diptera (adults)
Who is here? 1 guest(s)
 Tachina magnicornis male
|
|
| Christine Devillers |
Posted on 22-01-2008 12:36
|
 Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
Frons wide, fore tarsus black, black abdominal stripe widens on tergite 5, is it Tachina magnicornis ? (Spa, Belgium, 02-08-2005) I've read in the book of J. and H. Haupt that the frons and occiput are principally grey in T.magnicornis when the occiput is yellow in T.fera. I don't see that feature in the keys. Is it correct ? Christine Devillers attached the following image:  [95.51Kb] Edited by Christine Devillers on 11-02-2009 15:56 |
|
|
|
| Zeegers |
Posted on 22-01-2008 17:48
|
|
Member Location: Soest, NL Posts: 19310 Joined: 21.07.04 |
-1) This is, indeed, a male of magnicornis -2) I'm not familiar with the book by Haupt and Haupt -3) the feature mentioned is generally true, but there are many exceptions. As with nearly all features between fera and magnicornis Theo |
|
|
|
| Christine Devillers |
Posted on 22-01-2008 23:19
|
|
Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
Thanks a lot Theo On those photos, how do you see that it is a male? As it is a male, when the key give the feature of anterior claws (red arrow) clearly shorter than the last 2 tarsal segments combined. Could you tell me where are the 5th tarsal segment (blue arrow ?) and the 4th segment (black arrow ?). Christine Devillers attached the following image:  [26.45Kb] |
|
|
|
| Zeegers |
Posted on 23-01-2008 18:46
|
|
Member Location: Soest, NL Posts: 19310 Joined: 21.07.04 |
The fact that the claws are long, shows it must be male. Your arrows are correct. The feature itself is unreliable. It is magnicornis, simply because it is a male (see above) with broad vertex. Fera always has narrow vertex in the male sex. Theo |
|
|
|
| Jump to Forum: |