Winston K Marks' "Tabby" (short story, alien invasion, free): Spiders as aliens' weapon to kill all land life on earth!

Aliens apparently want our land, minus any life. Or may be it's the easier way to rid of humans, & then plant their own ecology. In any case, they've landed little especially engineered flies all over earth: flies that breed very fast, & are easy prey for spiders. Enough numbers of spiders, & we're doomed...

See also.

1. Insects, including spiders, as dangerous adversaries: Murray Leinster's "The Mad Planet" (download).

Fact sheet.

First published: If, March 1954.
Download full text from Project Gutenberg, Manybooks.
Rating: B.
Related: Stories of Winston K Marks; Alien invasion fiction.