Mecas inornata

Saperda inornata

Populus grandidentata, tremuloides

Irregularly spherical swelling of the twig, 1-3 cm. in diameter. At first smooth, pithy, in second season becomes cracked without and hollow within. Beetle bores its way out in May. On Populus grandidentata and P. tremuloides.

Saperda concolor

Salix

Irregularly ovate twig swelling, length 4 cm, diameter 3 cm

Mecas ornata

Ovate twig swellings, cracking the second season, on large toothed and quaking aspens, beetle.