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The Society for the study of flies (Diptera)

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#1 2019-08-27 21:44:22

RobSouthUist
Registered user
Name: Robin Sutton
From: South Uist
Registered: 2019-08-27
Posts: 4

Help with Cranefly Identification

I'm having a go at identifying craneflies for pretty much the first time and have got this rather nice specimen down to one of the Savtshenkia group using Alan Stubbs' "Key to the subgenera and species of Tipula" as modified by John Kramer in 2016.  I've managed to get it down towards the rufina/alpium/limbata/confusa end of things. Then eliminating rufina/alpium as the eyes were too far apart.  The last step deciding whether they are 4x scape width or 2.5x scape width has got me beat though.  At which point do you measure how far apart the eyes are?  Of course it's entirely possible I've made errors higher up and I'm actually nowhere near the right species. Your considered comments would be very welcome, thanks.


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#2 2019-08-30 13:41:12

johnkramer
DF Members
Name: John Kramer
From: Oadby, Leicester
Registered: 2008-02-20
Posts: 263

Re: Help with Cranefly Identification

Tipula confusa it is.  The rufina/alpium pair have a dark stripe along the side of the thorax (pleuron)  from neck to below wing.   In the 'separation of eyes' use the closest distance.
John K

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#3 2019-08-30 18:02:41

RobSouthUist
Registered user
Name: Robin Sutton
From: South Uist
Registered: 2019-08-27
Posts: 4

Re: Help with Cranefly Identification

Thank you, much appreciated. Reassuring to know I'd close to the answer.

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