Black carpet beetles lay about 90 eggs apiece. The eggs hatch in 6 to 16 days. Larva. The beetles emerge from their eggs as larvae. They are about 5/16th of an inch long, and long and slim.

unlike their larvae, are harmless. Here’s how to do it. Carpet beetles are oblong insects between about one-sixteenth and one-eighth of an inch in length. They can be black in color, and ...