Point lace paper fly cages It's Google books so I don't know how well the link will work. It's from the 1869 +Cassell's Household Guide.</i>
For this particular fly cage, you cut out some tissue paper things that are sort of like snowflake cut outs. You glue them together around a wire that will be used for hanging. Being a true Victorian, you add a couple of tassels.
A modern source, on Victorian crafts, which I had to extract from Snippet view, uses Cassell's directions and prefaces:
>The best plan of action is to build a roaring fire on the hearth, set your son to roasting chestnuts, your daughter to stitching her sampler, and then, while your spouse reads aloud from David Copperfield, you snip away on a fly cage.
These were apparently used not just for catching flies, but for holding insects in general, say, a butterfly. There is a rther awful early 19th C. memoir:
>The happy silence which had prevailed a few moments, was now interrupted by the children, who ran in with rosy and cheerful faces, the elder having a small paper fly cage in his hand.
>"What have you there, my dear?" said Mrs. Graham.
>A butterfly gran'mother--such a beauty--only see I have had such a run for it.
Gran'mother goes on to piously urge the kids to let it go.
>You would not injure it like some cruel boys, but do you think it can be happy, shut up in this thing when God has made it to fly about in the sun and air?
Naturally the kids let it go and run to give gran'mother an "atoning kiss."
By the way, I used the simple search strategy of paper "fly cage". If the link above doesn't work, append "cassell" to the terms.