Posted by Liekele Sijstermans on 03-07-2010 00:39
#12
I think this is Eloceria delecta.
According to Theo in previous track this species does not have palps. You could check that easily.
I have seen swarming of Tachinidae before with Siphona and Clausicella. According to Andersen (1982) there is swarming of males in order to facilitate quick fertilization of female.
Liekele