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Adults are 4-5 mm and have large zebra striped wings.

P. punctiformis is a naturalized fungus infecting Canada thistle.

Adults are long and slender (10-12 mm) with long black antennae, red heads, and grey bodies.

Adult M. janthiniformis emerge from stems in May, and reproduce until late June.

Gall flies are very small and look similar to a tiny mosquito.

Adults emerge in late summer and live for up to 3 years.

Adults are small, brown weevils 3-4 mm long with a rounded body.

Adults emerge from soil in April and June. Adults are 3-5 mm long and orange with brown stripes along the wings.

Adults emerge from soil in late May and are present through August. They are hairy and brown with white stripes.

Gall wasps are small and black. They do not have stingers.