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Extension > Garden > Diagnose a problem > What insect is this? > Insects found indoors > Winged Insects - Less than 1/4 inch long > Hackberry psyllids

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Hackberry psyllids

Pachypsylla celtidivesicula and P. celtidismamma

Whitney Cranshaw, Colorado State University,


Jeff Hahn, University of Minnesota

Size: 3/16 inch long

Description: Aphid-like or gnat-like with mottled brownish wings with small black and white spots; wings are held roof-like over its body and extends past its abdomen.

Where/When: They are found in and around homes, especially around windows, during fall, spring and occasionally during winter.

Significance: Hackberry psyllids are primarily a nuisance when found indoors. They generally do not harm people, although they can bite as they probe surfaces for food. They do not reproduce indoors.

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