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I'm back with new food ... I read a paper saying that there has been a problem !
1. Fonseca and Séguy didn't call Hydrotaea aenescens as it is now, they both put this species in the Ophyra genus . So many specimen in Belgium before 1970 where not named Hydrotaea aenescens but Ophyra capensis. Both species are really "the same" except for details (Fonseca) Ophyra capensis :
Squamae white with whitish border and fringe. Presutural dorsocentrals and acrostichals hardly distinguishable from thoracic hairs. 4,5-5,5 mm
and for females : " frontal triangle extending to lunule. "

There were 2 Ophyra in Fonseca key, the other one was Ophyra leucostoma, with description : "Lower squama strongly darkened, with dark brown border and fringe.
Presutural dorsocentrals well, acrostichals moderately, developed. Females : Frontal triangle not reaching lunule. 5,5-7,25 mm.
This one is now named Hydrotaea ignava (Harris 1780) !

As I see from the comments here we could read from pictures about the front ...
Here are some pictures with different angles of this zone of the head...
Can I hope some comments about and perhaps an ID ?



















Do I have to add that all those species are now recognised and present in Belgium :
Hydrotaea aenescens, Hydrotaea capensis and Hydrotaea ignava...

Thanks for reading,

Have a good day,
Didier.