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

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#116645
June 6, 2007 - Eastern Tent Caterpillar - Parasitism - Malacosoma americana

June 6, 2007 - Eastern Tent Caterpillar - Parasitism - Malacosoma americana
Richmond Hill, York Region, Ontario, Canada
June 6, 2007
Here it is again, two days later. The killer has emerged and pupated.
One can usually tell when a Tent Caterpillar has been parasitized at the cocoon stage - the cocoon is flimsy (note the lack of the yellow powdering typical of healthy cocoons) and may not be attached to the substrate (i.e. just sitting on a surface). A "burn" hole can often be seen (as in above) when the cocoon is flipped over.

Images of this individual: tag all
June 4, 2007 - Eastern Tent Caterpillar - Parasitism - Malacosoma americana June 6, 2007 - Eastern Tent Caterpillar - Parasitism - Malacosoma americana

Who is it?
So, who is the killer? and, Perhaps, shouldn't this be moved to whoever that pupa belongs to?

 
Tachinid, perhaps.
According to my notes, one of the killers was this Tachinid .

 
Possible alternative to tachinid...
...is the 'friendly fly,' Sarcophaga aldrichi, which is a parasitoid of tent caterpillars. The only image on BugGuide is of uncertain ID:

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