To obtain eggs from hoary elfin females, I take a small deli squat tub and punch holes into the bottom.  I then insert sprigs of bearberry (Arctostaphylos uva-ursi) into the holes of the tub.  I then place this tub on top of a 32 ounce soft drink cup filled 90 percent full of water such that the sprigs go into the water; but, the levels aren't so high that it floods the bottom of the squat tub.