Posted by ole on 19-02-2013 01:13
#1
Perhaps Oscinella?
found at the stream edge in grass today.
Thanks in advance, Ole
Edited by ole on 28-11-2016 13:23
Posted by von Tschirnhaus on 03-05-2013 22:41
#6
Oscinisoma cognatum (Meigen, 1830), Chloropidae. The three species O. germanicum (Duda, 1932), O. gilvipes (Loew, 1858), and O. cognatum are extremely difficult to distinguish. The image shows a shining humeral callus (= shoulder), a largely dark gena, a slightly flattened thorax, a wing only slightly longer than the abdomen, a completely yellow hind tibia, a frons darkened aside of the ocellar triangle, an ocellar triangle very long and with pollen (= pubescence) only aside and in front of the ocelli, a triangle not touching the eye margin, about ¾ width of the frons between the eyes, tergites glabrous, wing membrane partly yellowish, R4+5 apically slightly divergent with M1+2. All these characters here observable are not sufficient but typical for a distinction after the unpublished study (of much material including the types of gilvipes and germanicum) by M. von Tschirnhaus.
This is a typical species of the genus Oscinisoma Lioy, 1864 (Chloropidae, Oscinellinae), partly wrongly spelled Oscinosoma. The mesonotum (= scutum) is slightly depressed and not smooth but it has a rough surface.
The adults prefer the stratum close to the soil between Carex tussocks, running ant-like and living together with the raptorious Stilpon spp. (Hybotidae).
Edited by von Tschirnhaus on 30-05-2013 18:20
Posted by ole on 10-05-2013 23:40
#7
Thank you very much for your kind explanations!
Seems to fit the biotopes as well.
Ole