Fear of Insects

[AmemeAmeklin]

Optional dungeons with insects:
Cutter's Cry (anthill)
Lost City of Amdapor (moths, beetles)
Saint Mocianne's Arboreteum (giant beehive)
Palace of the Dead (all enemy types - but on lower levels, particularly the bees)

Required MSQ dungeons with insects:
Tam-Tara Deepcroft (beetles, mites)
Thousand Maws of Toto-rak (mites, giant scorpions)
Haukke Manor (little clouds of flies)
Sunken Temple of Qarn (required by a level 50 quest) (temple bees - would strongly recommend unsynced runs only due to how these are encountered)

Required for progression in GC rank:
Halatali (praying mantis)
Aurum Vale (scorpions)
Dzemael Darkhold (giant gnat adds in first boss fight)
Amdapor Keep (giant gnats)

That should be the majority of normal mode dungeons. Bug models in dungeons slowly get phased out and I can't think of any from HW or SB off the top of my head that aren't overworld enemies.

I REALLY REALLY recommend an unsynced run with level 70 players for Temple of Qarn or you will have a very bad time, especially on the first boss. It forces you to face multiple waves of bees on top of encountering them in other parts of the dungeon.

That said, of note in overworld enemies...

ARR
Thanalan: giant ants
Black Shroud: giant gnats
La Noscea: *edit: Actually La Noscea has wespes (aka bees)

HW
Coerthas: Every insect has been frozen to death and replaced by dragons
Abalathia's Spine: flying cats...wamouras
Dravanian forelands: giant fleas that ostensibly chew on chocobos but they are somehow massive
Dravanian hinterlands: giant gnats ("Tarantula Hawk"), giant caterpillars, revenge of the dodos
Special shout out to the Vath, the resident beast tribe which is vaguely insect-like, and their insane god Ravana who is literally a giant dancing insect - probably not triggering though, he's very graceful and walks around on two legs while the other four wave swords.

SB
Far East: Very angry beetles and occasionally caterpillars
Fringes: giant gnats. Like, it's got your regular giant gnats...and then there's Erle, an A rank hunt target that is four times the size.
Gyr Abania in general: really...really big bugs. Antlions the size of houses.

I'm probably forgetting some things. Hope this helps!