I seem to remember the area outside the wall in Misty Thicket being lousy with Giant Wasps, but the passed few days I've checked there are none at all.
Are they currently spawning and just incredibly rare? I have tried during the day and night in-game and have not seen one.
Also, please note that Giant Wasp Wings are a possible drop on their loot table even though Allah does not list it in the same format as the other loot (there's a note at the top).
Here's the EQ Bestiary link:
http://eqbeastiary.allakhazam.com/search.shtml?id=4612