Damage: The larvae attack the xylem of host tree. Eggs are deposited in old, weak, and/or cutted trees, and the larvae grow up within the xylem. It is quite difficult to identify infested trees from the outside view. Adalts occationally emerge from the sawn woods, as this horntail have long larvae period.
Life cycle: There is one generation par two to three years. Life cycle of this horntail is known fragmentally. Adalts emarge from May to August, and females put their ovifester into the xylem of the host trees through the barks to deposit the eggs. After hatching, young larvae mainly chew into the sapwood, and their garellies are packed to the full with fine excrements of the larvae. Larval garally becomes wider atend on the growth of larva. Mature larvae pupate in the woods. After emerging, the adalt make a rounded hole of 7-8 mm in diameter for escaping.
An adalt female X. matsumurae
An adalt male X. matsumurae
Larval garelly of X. matsumurae
An escape hole of X. matsumurae
Urocerus antennatus (Marlatt)
Taxonomy: Hymenoptera, Siricidae.
Body size: adalt females ca. 25 mm long (including hypopygium, but excluding ovipositor sheath).