Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowseInfoImagesLinksBooksData
Photo#16344
Gnats in Jack-in-the-pulpit

Gnats in Jack-in-the-pulpit
Pennypack Conservancy Trust, Montgomery County, Pennsylvania, USA
May 4, 2005
Size: 2-3 mm
Jack-in-the-pulpit flowers have a fungus-like smell that attracts many tiny insects, particularly fungus gnats. The male flowers have an escape route, a little slit at the bottom of the spathe; so they leave, loaded with pollen and can repeat their mistake, falling into another flower. If they fall into a female flower, they are out of luck; they accomplish pollination and pay for the favor with their lives. Members of approximately 20 families of insects visit these flowers, including fungus gnats and dark-winged fungus gnats. I guess that mine is one of these and would appreciate some help in narrowing it down if possible. Another visitor is a species of thrips (Heterothrips arisaemae), which is now suspected of being the main pollinator as well as main herbivore of this plant. See International Symposium on Thysanoptera or the html version Symposium on Thysanoptera. Also Deceitful Jack-in-the-pulpit. Another view of this flower and bugs in
I invite those with better equipment (and younger eyes) than mine to take photos of this interesting fauna, they would make a nice addition to the guide.

Southeastern PA

Tribe Exechiini
From what I can see: There is no sagittal furrow on the head and wing venation as well as habitus points to Exechiini. Such short CuA fork (posterior wing veins) is typical for Exechia, which is a known visitor of Arisaema. Anyway, without specimen by hand I can not make a certain ID.

so long,

Family Mycetophilidae
Hello Beatriz,
Your gnat belongs to the family of Mycetophilidae (Fungus gnats), but Iám afraid that is as far my knowledge goes on this one!
Greetings,
Gerard Pennards

 
Thanks
That is what I thought. The resolution isn't too good, so I can't ask for more; that is why I hope that somebody else come up with better pictures.

 
By the way...
By the way, this only applies to the gnat in the lower part of the picture, the parts that are visible in the upper side are definitely from another family, Chironomidae!
Greetings,
Gerard Pennards

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.