Another garden Coleophorid

On 18th May I noticed some Coleophorid feeding signs on our alder and eventually managed to trace the culprit to the case shown below, fixed for pupation as it was in the same leaf-edge spot today and has now been taken into custody.  Four species are known from alder but I believe this has to be either the nationally scarce Coleophora orbitella, which was new for the garden last year, or else Coleophora binderella which I had here back in 2014 (both were adults dissected by Peter Hall).   

Coleophorid case on alder, Westcott 18th May

Further feeding signs elsewhere on the tree had appeared by today and another case was found, still actively feeding.

Feeding signs on alder, Westcott 21st May

Coleophorid case on alder, Westcott 21st May

Looking at the case photos on the UK Leaf-mines website suggests that I may even have both species here, with the first a candidate for orbitella while the second looks more like that of binderella, but hopefully I'll find out for sure in a few weeks.  Unfortunately the adults do look fairly similar so dissection will almost certainly still be required.

Dave Wilton Westcott, Bucks