As a collector of period postcards I was intrigued by the message on the reverse of a posted 6 July 1919 Littlehampton (Sussex) pictured postcard with written message saying (which I edit here) "D. M. Just a card in answer to your letter...What stormy weather?...We are very busy here and swarmed with black beetles - even in our bedroom. Yrs. Nellie". What could these beetles be of the time? Any suggestion? Could these be 'Thunder Bugs' that I knew of as a child growing up in the 40's/50's. Except, I recall these as brown bugs.
Thunder flies (thrips) were my first thought. In your transcription above you've written 'What stormy weather?' which made me think the writer wasn't experiencing any, but in fact there is no question mark and it sounds like Nellie is a bit fed up with storms, making thrips more likely I would say. They might look like tiny beetles and most of the ones I see are black.
Yes, I, inadvisedly, transcribed incorrectly by adding in the '?' after what I read as Nellie's written question to stormy weather she was experiencing on the coast in Littlehampton. I know the tiny little 'beetles' you refer which can swarm and irritate during summer storms. These may well be 'Nellie's beetles'. And, I remind myself about these little irritants via http://en.wikipedia.org/wiki/Thrips Although, the 'storm beetles' I wanted the dramatic July 1919 Littlehampton infestation to be would be 'proper black beetles' of size and drama like Stag Beetles or other large black beetles.