The body is white, long and slender, striated, and with a few long hairs. Immature forms resemble adults but are smaller.
Eggs are spherical and pearly white.
These spots are 0.25 to 0.50 inch in diameter and frequently run together. When damaged fruit matures, it is often deformed and misshapened. Leaf feeding causes small blisters, 0.125 to 0.25 inch across, which are first red and later blacken. Leaf function can be seriously impaired. Abandoned and unsprayed young pear trees are subject to severe, periodic blister mite infestations.