Identification: Apical third to half of antennae white, and basal portion black; body all black except broken yellow collar at back of head, and yellow dorsolateral stripes on thorax; legs black with white rings at joints.
Wing Span: 1.6-2.0 cm
Caterpillar Hosts: Larvae bore in bark of low-growing willow species (Salix). Young larvae invade the burrows of the beetle Cryptorhynchus lapathi and the galls of Saperda concolor.
Range: Eastern United States and southeastern Canada, west to Manitoba and Nebraska.
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