Players reported in July 2011 that this quest may still not give updates for the tarantulas eating the scarabs.
This quest is given by Xilla Beetlebinder on the path that leads from the ocean to the deset area -923, -145, -343
It should be noted that this series does not reward armor, but instead each unlocks a piece of armor for sale by Xilla Beetlebinder.
The first step is to frighten a skittish scarab into the tarantulas to obtain a pristine carapace with a Battle Prod that he gives you. You do this by simply brushing against them while you have the beetle prod that Xilla gives to you. Just nudge them to the tarantula area at -1038, -112, -577 and the tarantulas will eat them.
After they have eaten the scarab it will leave a carapace that you can take to advance the quest. After this return to Xilla Beetlebinder. This opens up the Beetle Herding - Act II quest.
Xilla Beetlebinder in the Sinking Sands has asked me to help her gather materials to make her special chitin armor. The armor can only be made if the scarab carapaces are in pristine condition. Killing them in any normal fashion would result in damaged shells that would not work for the armor. Xilla however knows a trick to gathering undamaged carapaces. Xilla lent me one of her special bug zappers, and explained that there is a certain type of scarab southeast of the tarantula valley that are highly reactive to the shocks. I need to seek out these scarabs and herd them with the bug zapper into the tarantula valley. From there the spiders' poison should do the rest of the work.
I need to use the bug zapper Xilla lent me to frighten skittish scarabs into the tarantula valley. From there, the spiders' poison should do the rest of the work to obtain a pristine carapace.
Frighten a skittish scarab into the tarantulas to obtain a pristine carapace.
The tarantulas left me a pristine carapace.
I was able to fulfill Xilla's request to gather pristine scarab carapaces.
I need to return to Xilla Beetlebinder at Sandslide Passage in Sinking Sands.
Return to Xilla Beetlebinder.
I returned to Xilla.
I returned to Xilla Beetlebinder and now have access to a new piece of her special gear.
I was able to fulfill Xilla's request to gather pristine scarab carapaces. I should now have access to one of her special items.