Camped these as a level 39 SAM, i am 1/9 for the key, other drops are, three beetle shells, two beetle jaws, no insect wings or crystals, they were easy prey. hope this gives you an idea on the drop rates, although it might have just been luck.
PS: These DO aggro.
Edited, Sep 10th 2007 12:06pm by RockOnFire