Posted by Jorn R Gustad on 17-07-2017 18:53
#6
Thanks John, I am so inexperienced in the clinal terms of
Diptera, so I do not understand in which way your comment directs. Please elaborate.
I find the specimen to match the abdomen, claw and oe features for
magnicornis in key of Tschorsnig & Herting, 1994 - translated by Rayner & Raper (2001), but I am unsure if the frons are broad enough for it, or if the frons points to
fera. An experienced eye might tell?
Citation, from page 50:
Frons in males 0.68 - 1.08x, in females 0.94 - 1.28x as wide as one eye. Fore tarsus yellow, seldom brown.
The black longitudinal abdominal stripe ends almost always in a tip on tergite 5. Males: anterior claws almost
as long as the last 2 tarsal segments combined (fig. 146); frons as a rule without oe, seldom 1 oe present
..................................................................................................................................
fera L.
− Frons in males 1.10 - 1.39x, in females 1.27 - 1.55x as wide as one eye. Fore tarsus brown or black. Males:
anterior claws clearly shorter than the last 2 tarsal segments combined; frons with 1 or 2 oe ....................7
7. The black longitudinal abdominal stripe widens towards the end on tergite 5, seldom ending in a point. Males:
anterior claws longer than the last tarsal segment. Females: 4th segment of the fore tarsus clearly wider than
long..................................................................................................................
magnicornis Zett.
Edited by Jorn R Gustad on 17-07-2017 19:02