I agree that they’re likely phorid flies. Consider placing the puparia (on or off the glue trap) in a container that is secured with fine screening. Then, see what emerges. A small drop of a concentrated citrus oil (such as in the product GooGone) tends to help loosen the glue just enough to allow the objects to be removed without much damage. Use the solvent sparingly so as not to harm the developing beast.
-Rich Richard J. Pollack, PhD HARVARD UNIVERSITY Environmental Health and Safety (EH&S) Senior Environmental Public Health Officer 46 Blackstone St. Cambridge, MA 02139 Office: 617-495-2995 Cell: 617-447-0763 www.ehs.harvard.edu richard_poll...@harvard.edu<mailto:richard_poll...@harvard.edu> From: "'Ritchie, Fran E' via MuseumPests" <pestlist@googlegroups.com> Reply-To: "pestlist@googlegroups.com" <pestlist@googlegroups.com> Date: Friday, October 8, 2021 at 9:03 AM To: "pestlist@googlegroups.com" <pestlist@googlegroups.com> Subject: RE: [EXTERNAL] Re: [PestList] Larvae in historic out building Thanks Gretchen and Tony! I have forwarded this info to the concerned party. Gretchen, I don’t think they’re interested in saving any of the specimens, but I wouldn’t mind hearing her advice, in case I’m ever asked for help! Fran Ritchie, Conservator (Objects) Harpers Ferry Center fran_ritc...@nps.gov American Institute for Conservation Professional Associate (peer-reviewed) From: pestlist@googlegroups.com <pestlist@googlegroups.com> On Behalf Of Anderson, Gretchen Sent: Thursday, October 7, 2021 10:15 PM To: pestlist@googlegroups.com Subject: [EXTERNAL] Re: [PestList] Larvae in historic out building This email has been received from outside of DOI - Use caution before clicking on links, opening attachments, or responding. Hi Fran, Our entomologist agrees with Dr. Irwin - probably a carrion feeding larva, who crawled off the carcass to pupate. She is curious on how the trap was set up. She also has some cool tips on how to get samples off a sticky trap - if you are interested. Let me know. Gretchen Carnegie Museum of Natural History ________________________________ From: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> on behalf of Tony Irwin <dr.tony.ir...@gmail.com<mailto:dr.tony.ir...@gmail.com>> Sent: Thursday, October 7, 2021 6:41 PM To: pestlist@googlegroups.com<mailto:pestlist@googlegroups.com> <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> Subject: Re: [PestList] Larvae in historic out building Hi Fran The "larvae" are puparia (pupa inside last larval skin) of scuttle flies - Phoridae. Several species are to be found feeding on carrion (while others feed on fungi, or are internal parasites of various invertebrates). I think the skink is the most likely source of the flies. Best wishes Tony Dr A.G.Irwin 47 The Avenues Norwich Norfolk NR2 3PH England mobile: +44(0)7880707834 phone: +44(0)1603 453524 On Thu, 7 Oct 2021 at 19:37, 'Ritchie, Fran E' via MuseumPests <pestlist@googlegroups.com<mailto:pestlist@googlegroups.com>> wrote: Hello again! More larvae to ID. This is a photo I received from someone asking for help, so I can’t get a closer image. To me, they look like fly larvae, but I don’t think they’re feasting on the snake(?) on the trap. Should staff be on the lookout for another dead animal? Am I misidentifying a wood-boring pest? This trap is from an open air wooden structure on Cumberland Island (off the coast of Georgia). It does not house objects. Bonus points if you can ID the snake. Thank you! 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