American spider beetle Mezium americanum
Adult
Size: 3-4mm
Shape: Spider-like
Colour: dark brown abdomen,yellow head, antennae and legs
Antennae: Long, hairy, no club
Distinguishing features: Yellow head, thorax and legs
Larvae are scavengers
Adults eat: very little
Note: not common in the UK and very similar to Mezium affine
Size: 3-4mm
Shape: Spider-like
Colour: dark brown abdomen,yellow head, antennae and legs
Antennae: Long, hairy, no club
Distinguishing features: Yellow head, thorax and legs
Larvae are scavengers
Adults eat: very little
Note: not common in the UK and very similar to Mezium affine
![](imageresize.php?file=data/usercontent/786f36814bc25e116c843254272366a09683e54838c55ea580f8cf94a6865ebb.jpg&opts=w800h800e0)
![](imageresize.php?file=data/usercontent/786f36814bc25e116c843254272366a09683e54838c55ea580f8cf94a6865ebb.jpg&opts=w200h200e0)
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American spider beetle Mezium americanum
100%
![](imageresize.php?file=data/usercontent/786f36814bc25e116c843254272366a09683e54838c55ea580f8cf94a6865ebb.jpg&opts=w200h200)
![](imageresize.php?file=data/usercontent/21a378d5835b704e0172c3d92c047196167d8b4d4985ac06e14dc3ce57f0807d.jpg&opts=w200h200)