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, insects and people from the 2018 BugGuide Gathering in Virginia, July 27-29

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#230473
Idia? - Idia americalis

Idia? - Idia americalis
Waltham, Middlesex County, Massachusetts, USA
September 28, 2008
Presuming I. americalis, but how is that separated from I. majoralis?

Thanks
Thanks for the info. I added that to the majoralis species page. Not a great image, but I'll keep it for now as it's extending the flight season in MA.

Idia
Yes, your ID is correct, it is americalis. The differences to separate americalis from majoralis are as follows:

The subterminal line (nearer to the costa) of majoralis forms a more squared distad point - like a square protrusion, whereas in americalis it is more a of point, like a small bump.

Also, in americalis, there is a dark patch on the terminal border of the FW just below the apex, that is not present in majoralis. (It's a bit faint in your specimen, but definitely present)

Hope that helps.

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