What?!?! Where? in Antartica? I have no idea of the nocturnal habits of insects, maybe they do go to sleep in the dark, I don't know . . . I have spent more than one night battling mosquitoes, however . . .
But, I do also concur that AT Shelters provide no protection.
A tent, however, provides a very effective barrier against the pesky dive-bombers.
Anyone considering using a tarp, I would highly suggest also having a bug net to drape over you - not just a head net. They might not stick you with a head net, but the incessant buzzing might drive you nuts . . .
See you on the trail,
mt squid
some observations