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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Braconid and Ichneumonid Wasps (Ichneumonoidea) » Ichneumonid Wasps (Ichneumonidae) » Pimplinae » Ephialtini » Polysphincta Genus Group
Photo#761631
ichneumonid larva on longjawed orbweaver
Copyright © 2013 ophis

ichneumonid larva on longjawed orbweaver
Hyde Park, Suffolk County, Massachusetts, USA
April 10, 2013
Size: spider about 3 mm
The Polysphincta sp. group in Pimplinae is "unique within Ichneumonidae" as ectoparasitoids of spiders (Gauld and Dubois, 2006). On fallen twig on W bank Mother Brook, upstream side Reservation Road.
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Contributed by ophis on 19 April, 2013 - 3:42pm

Possible Genus
In your photo identifying the spider you indicated the genus to be Tetragnatha. The only genus of the Polysphincta genus group that is recorded on Taxapad as an associate of Tetragnatha is Acrodactyla.
… Bob Carlson, 19 April, 2013 - 5:15pm login or register to post comments

 
re: Possible Genus
Very interesting
Spider keyed to genus based on eye arrangement, but I can't find a visual match
BugGuide images show ichneumon larvae on variety of spiders
… ophis, 19 April, 2013 - 7:58pm login or register to post comments

 
Spider Genus
Perhaps a spider person will comment on your ID, and if the genus were to be different, there might be other ichneumonid possibilities. Of course, the best way to identify the ichneumonid would be to rear the adult.
… Bob Carlson, 19 April, 2013 - 8:16pm login or register to post comments

Moved
Moved from Pimplinae.
… ophis, 19 April, 2013 - 3:43pm login or register to post comments

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