To convert the scientific notation \( 2.67 \times 10^{-3} \) meters to decimal notation, you move the decimal point to the left by three places (since the exponent is -3).
Starting with \( 2.67 \):
- Move the decimal point one place to the left: \( 0.267 \)
- Move it again: \( 0.0267 \)
- Move it a third time: \( 0.00267 \)
Therefore, the length of the wasp's stinger in decimal notation is 0.00267 meters.