Duff millipedes

6337 These are tiny (approx 1-5mm) black worm-like but crawl like caterpillars. They’re inside my walls and climb up windows and walls and are spreading through the whole house wherever hasn’t been sprayed. I think they’re carpet beetle larvae but they’re not in my carpets. I’ve killed over 200 myself and pest control has been 3 times, I was told 99% of carpet beetle larvae don’t behave like this. This has been going on for 4 weeks and I am going crazy. Please help confirm what these are, they look like your recently posted photo but somewhat different. Thank you. From Victoria, BC.

Number 6337 These are duff millipedes (Diplopoda: Polyxenidae; Polyxenus sp.), sometimes also called dwarf or bristly millipedes. Normally found outdoors where they feed primarily on lichens and algae, they cause no harm and do not need control. Visit Click here for more detailed information.

1 reply
  1. Natalie says:

    Thank you for very much for identifying the pests in my home, that’s exactly what I’ve got. I was told I have carpet beetle larvae but, as my research indicates, these millipedes are often mistaken for carpet beetle larvae but are much smaller and like to climb up walls and around windows, especially in the bathroom and kitchen, they have no interest in my carpets or furniture thank goodness. I have killed hundreds of them in my home over the past month and pest control has sprayed several times as they continued to spread. Now that I’ve relayed what they actually are to my landlord, I’m told that someone will inspect the outside of my home to find the source and a long-term solution. Thank you!!!

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