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View Thread :: Identification queries :: Diptera (adults)
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female Therioplectes gigas ? > yes
Tjitske Lubach
#1 Print Post
Posted on 22-05-2017 20:42

Location: France, Indre, Saint-Gilles
Posts: 144
Joined: 12.08.09

Today I found this enormous Tabanidae on Heracleum sphondylium (Hogweed). Never seen anything this big, must have been at least 20-23 mm, probably more. First thought was a very large Volucella (Syrphidae), but soon after I found out it was a horsefly. I suppose it must be a female Therioplectes gigas? There was a second one but I could not see if this was male or female.

Thanks in advance for any information about this spectacular species, Tjitske Lubach

It concerns this observation
Therioplectes gigas observed at 2017-05-22 France - La Fontoure
Edited by Tjitske Lubach on 24-05-2017 13:50
Tjitske Lubach
#2 Print Post
Posted on 24-05-2017 08:07

Location: Soest, NL
Posts: 13333
Joined: 21.07.04

Yes. Congratulations, pretty rare in France.

Tjitske Lubach
#3 Print Post
Posted on 24-05-2017 09:49

Location: France, Indre, Saint-Gilles
Posts: 144
Joined: 12.08.09

Thank you Theo !

Could you tell me where to find some information on the biology of this species? I have been searching the web, but I didn't find much.

Thanks in advance,

Tjitske Lubach
#4 Print Post
Posted on 25-05-2017 09:04

Location: Soest, NL
Posts: 13333
Joined: 21.07.04

I am not sure what you mean with 'biology'.

A taxonomical review is due to yours truely (Zeegers 2005 in Studia Dipterologica). The larvae are very little know (only from USSR species, in Andreeva). The males hover persistently at 1 meter altitude. Seguy and Zeegers (2005) give the review of the records in France. Otherwise, little has been published....
Tjitske Lubach
#5 Print Post
Posted on 12-06-2017 20:30

Location: France, Indre, Saint-Gilles
Posts: 144
Joined: 12.08.09

Thank you Theo. That is what I wanted to know. Something about the life (where do the larvae live, what do they eat, etc...). I understand that little is known about this Tabanidae.

What word do they use in English, talking about the way of life of a species ? Maybe they use ecology ? In French they use 'biologie' I far as I know.

I am sorry I can't find your article though...
Edited by Tjitske Lubach on 12-06-2017 20:31
Tjitske Lubach
#6 Print Post
Posted on 13-06-2017 07:18

Location: Soest, NL
Posts: 13333
Joined: 21.07.04

It is in Studia Dipterologica, or on my researchgate.

Sergiy Filatov
#7 Print Post
Posted on 14-06-2017 17:48

Location: Kharkiv, Ukraine
Posts: 257
Joined: 22.10.10

Hi, Theo

I couldn't find the paper among articles uploaded to your profile at RG. Would be great to have a copy!
Tjitske Lubach
#8 Print Post
Posted on 14-06-2017 17:56

Location: France, Indre, Saint-Gilles
Posts: 144
Joined: 12.08.09

Hello Theo,

Yes, I have tried also, but I couldn't find it either...

Tjitske Lubach
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