Thread subject: Diptera.info :: Tachinidae (now identified as Bithia spreta)

Posted by Malgo on 22-11-2020 17:43
#1

This fly was about 8mm and seen on Martin Down, a chalk grassland site in the south of England. The bristly abdomen suggests a Tachinid but vein M curves gently rather than bending sharply. Any help in identifying it would be appreciated.

Edited by Malgo on 22-11-2020 18:34

Posted by Malgo on 22-11-2020 17:45
#2

Adding photo

Edited by Malgo on 22-11-2020 17:52

Posted by Malgo on 22-11-2020 17:48
#3

Adding photo

Edited by Malgo on 22-11-2020 17:52

Posted by Malgo on 22-11-2020 17:53
#4

Fourth photo

Posted by Zeegers on 22-11-2020 18:01
#5

A Bithia spreta, a chalky species indeed.
While Sarcophagidae always has a angular bend in vein, several Tachinidae do not: all the tribe Blondeliini, many Leskiini (amongst which Bithia) and no doubt others.

Theo

Posted by Malgo on 22-11-2020 18:33
#6

Many thanks for the quick identification. This species does not show up on most sites featuring Tachinids so it is not surprising I couldn't id it. Even this site only has photos identified as Bithia sp.

Malcolm

Posted by Zeegers on 22-11-2020 20:14
#7

Many Bithia are very difficult to separate, but spreta is a kind of "Eriothrix light" if you get my meaning: small red lateral spots on tergites.
It is definitely uncommon, but well known from southern England.


Theo