Those are psychodid flies, so drain flies, sink flies, moth flies, or sewer 
gnats are all good common names. I prefer moth flies.

Louis N. Sorkin, B.C.E.
Entomologist, Arachnologist, Myriapodologist
Entomophagy Research
Division of Invertebrate Zoology|American Museum of Natural History
Central Park West at 79th Street|New York, New York 10024-5192
sor...@amnh.org<mailto:sor...@amnh.org>
212-769-5613 voice | 212-769-5277 fax | 917-953-0094 local pager

The New York Entomological Society, Inc.
www.nyentsoc.org<http://www.nyentsoc.org/>
n...@amnh.org<mailto:n...@amnh.org>
[cid:image001.png@01D110A0.A110F570]


From: pestlist-ow...@museumpests.net [mailto:pestlist-ow...@museumpests.net] On 
Behalf Of William Shepherd
Sent: Wednesday, August 24, 2016 2:19 PM
To: pestlist@museumpests.net
Subject: RE: [pestlist] Fruit Fly Question

Hello!

                Sorry I didn't get back to everyone yesterday, I ended up 
needing to move some shelving units. The general consensus seems to be on drain 
flies, thank you everyone that took the time to reply. I've attached an image I 
took of a trap that shows four flies right together. Hopefully the quality is 
enough to make an identification, I think a macro lens needs to be my next 
purchase!

                Thank you everyone in advance.

William Shepherd
Collections Officer
Swift Current Museum
44 Robert Street West
Swift Current, Saskatchewan
S9H 4M9
Phone: 306-778-4815
Fax: 306-778-4818

From: pestlist-ow...@museumpests.net<mailto:pestlist-ow...@museumpests.net> 
[mailto:pestlist-ow...@museumpests.net] On Behalf Of Louis Sorkin
Sent: Monday, August 22, 2016 3:07 PM
To: pestlist@museumpests.net<mailto:pestlist@museumpests.net>
Subject: RE: [pestlist] Fruit Fly Question

A picture will help clear up the uncertainties. There are a few Drosophila 
species that can live like phorids and psychodids. Not all are on fermenting 
fruits. One species develops on fresh fruit, in fact.
Lou Sorkin


-------- Original message --------
From: Lynn Frank 
<lfr...@suburbanexterminating.com<mailto:lfr...@suburbanexterminating.com>>
Date: 8/22/16 17:00 (GMT-05:00)
To: pestlist@museumpests.net<mailto:pestlist@museumpests.net>
Subject: RE: [pestlist] Fruit Fly Question
Defiantly moth fly (drain fly)

-----Original Message-----
From: pestlist-ow...@museumpests.net<mailto:pestlist-ow...@museumpests.net> 
[mailto:pestlist-ow...@museumpests.net] On Behalf Of Ramona Duncan-Huse
Sent: Monday, August 22, 2016 3:03 PM
To: pestlist@museumpests.net<mailto:pestlist@museumpests.net>
Subject: RE: [pestlist] Fruit Fly Question

Could be a drain fly from the drains in bathroom area.  See photo

-----Original Message-----
From: pestlist-ow...@museumpests.net<mailto:pestlist-ow...@museumpests.net> 
[mailto:pestlist-ow...@museumpests.net] On Behalf Of Jablonski, Megan T CIV 
NHHC, NUM
Sent: Monday, August 22, 2016 2:54 PM
To: pestlist@museumpests.net<mailto:pestlist@museumpests.net>
Subject: RE: [pestlist] Fruit Fly Question

Are you sure they're fruit flies? I deal with a similar issue earlier this 
summer. We had tons of what I thought were fruit flies in our collections area, 
so I posted a photo of them on this listserv.  By doing that, I was informed 
that they were actually "Black Fungus Gnats," which were an indicator of excess 
moisture in our collections area! Would you be able to post a close-up picture 
of your flies?

Megan Jablonski
Collections Manager
Puget Sound Navy Museum
Naval History & Heritage Command
251 1st Street
Bremerton, WA 98337
p. (360) 627-2288
f. (360) 627-2273

www.PugetSoundNavyMuseum.org<http://www.PugetSoundNavyMuseum.org>
www.history.navy.mil/PSNM<http://www.history.navy.mil/PSNM>
www.facebook.com/pugetsoundnavymuseum<http://www.facebook.com/pugetsoundnavymuseum>

FOR OFFICIAL USE ONLY - PRIVACY SENSITIVE: ANY MISUSE OR UNAUTHORIZED 
DISCLOSURE MAY RESULT IN BOTH CIVIL AND CRIMINAL PENALTIES.




-----Original Message-----
From: pestlist-ow...@museumpests.net<mailto:pestlist-ow...@museumpests.net> 
[mailto:pestlist-ow...@museumpests.net] On Behalf Of William Shepherd
Sent: Monday, August 22, 2016 11:44 AM
To: pestlist@museumpests.net<mailto:pestlist@museumpests.net>
Subject: [Non-DoD Source] [pestlist] Fruit Fly Question

Hello,



                I have an odd question. I've been noticing the occasional fruit 
fly in my office area/washroom/work areas which are located in the basement of 
our building. I don't allow any kind of food on this level of the building, nor 
any drinks outside of water in resealable bottles and then only in designated 
areas with restrictions. Most of the time there's no one else on this level of 
the building and if there is I'd likely notice them bringing in food or other 
drinks. I haven't seen any fruit flies in the collections storage areas (woo!). 
There are exhaust vents in my work area and in the washroom. The washroom vent 
empties out into a crawl space under part of the building and I'm not sure 
where my work area vent goes but potentially the same spot. Some of the fruit 
flies have been getting stuck in the sticky trap in the washroom which is 
located by the door jam. I haven't noticed any fruit flies in other traps so 
I'm thinking they may be coming from there and potent  ially from the crawl 
space through the vent, though why t hey'd be in there I don't know. The main 
level of the building does have food friendly areas such as offices and a food 
service area for events but there doesn't seem to be an issue up there and I 
don't know how they would continually be getting down here as there is always 
at least one closed door to get, though generally more.

                It's a scent free workplace so it's not like I'm wearing eau de 
pourriture fruits perfume down here!



                Any thoughts?



William Shepherd

Collections Officer

Swift Current Museum

44 Robert Street West

Swift Current, Saskatchewan

S9H 4M9

Phone: 306-778-4815

Fax: 306-778-4818




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