Pietro Cozzi Tinin
Headphoneus Supremus
Not to put to fine a point on it but depending on the context the plural for locus can be locus, loca, loco, loci and a bunch more."the place where something is situated or occurs"
The plural is "loci", so Ripper2860 should have said "Loci swarms"....
I couldn't find the first post back but I think it should be loco in this instance.