Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Photo#689076
Mastophora bisaccata

Mastophora bisaccata
Jugtown Plains, Otisfield, Oxford County, Maine, USA
August 11, 2012
Likely same as .

Images of this individual: tag all
Mastophora bisaccata Mastophora bisaccata Mastophora bisaccata

Moved to Mastophora bisaccata
Moved from Bolas Spiders. ID based on range, no humps, shape of abdomen, dorsal pattern, and dark ventral femur I.

 
It almost looks like a gall mimic!
This is totally cool, M.! Below is my original curiosity followed by some internet enlightenment. I'm sure everyone who has commented on this already knows what I added. I'm hoping others will stumble upon it, and be fascinated, the way I am, by the variety of methods that arthropods achieve their objectives!
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Possibly too many tell tale silk strings though. Do they use webs to capture prey or, like tarantulas, do they simply wait for prey to wander up to them?

Ah! Never mind! Google was kind to me this time. Bolas - I thought it was bolos, so I never made the connection. Bolas are thrown to take down moth flies, and other insects. They use pheromone-analogues to attract insects, and a sticky blob on the end of a silk line is used to bring down prey.

Related genera are referred to as "angling spiders". This is the type of information that would be nice to see in the information tag. I get the feeling sometimes that this is no longer seen as "being consistent with the objectives of Bugguide." I hope I'm wrong!

I've always loved learning something that explains what makes a species special. I assume everyone here does. In the end it probably comes down to time and credibility. People who can speak authoritatively on the insects, probably don't have the time. Hopefully, it is not to presumptuous to add some details here. They were found on Wikipedia. I cannot guarantee the accuracy, but accept it at face value.

Moved
Moved from Spiders.
This was a first for me too. I found 3!

 
Oh! Now you're rubbing it in!!
What about the ecology? How did you discover them? What were they doing?

 
They were all found on white oak leaves
in an area dominated by pitch pine and white oak. I found 2 of them while scanning the leaves for caterpillars; they were simply sitting on the leaf in this position. They didn't move unless picked up. The third was swept out of some white oak branches.

 
Mastophora
oh gosh... so jealous over here!

Yes, Bolas Spider
Genus Mastophora in the guide here
We're envious and have never seen one of these :(