Follow-up to my Man-Moth post [right below]. So start there.
As I say in comments in response to Peter, I take it our melancholy (indeed, as per the final stanza mono-lachrymous) protagonist wants to be squeezed out through the little hole he benightedly takes the moon to be. He envisions himself becoming like scrolling black toothpaste - pasty, reduced-moth volutes [see illustration] adorning the capital of the black column of the world, emerging into the upper world of the light. Somehow this fits with his anxiety that the sky is not a properly protective roof.
On the other hand, if "be forced through, as from a tube, in black
scrolls on the light" contains a typo for 'scrawls', then this is on a par with the
whole mountain/fountain kerfuffle in Pale Fire. (Do we trust this site, plagiarist.com? Anyone have a more reputable text to check against?)
It seems appropriate to give your insect characters spatial anxieties - about being squeezed; strange obsessive-compulsions to enter and remain in cramped and dubious spaces. I've never been a bug, but this seems reasonable to me. As per my previous post, bug hero comics in the 60's (and earlier) often didn't manage to generate the appropriate atmosphere of existential dread. Perhaps this is why the genre declined. (I'm working that bondage cover art page for all it's worth.)
"Keep pushing, fly girl! We must keep the ceiling and floor apart," sounds like a babblefished-and-back version of some Parliament lyrics. "The roof, the roof, the roof is on the floor." And Lxo is losing focus - is hardly Shakespearean. Dramatically, "Man-Moth" is more successful at evoking dread at the awful prospect of being squeezed.