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Photo#509179
Bugs with ants - Lasius arizonicus

Bugs with ants - Lasius arizonicus
Huachuca Mountains, Cochise County, Arizona, USA
April 25, 2011
Two clusters of bugs were under a rock with an ant nest, in oak/juniper zone.

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Bugs with ants - Lasius arizonicus Bugs with ants - Lasius arizonicus

Moved
Moved from Ants.

Moved
Moved from ID Request.

Lasius
The ants are in the genus Lasius (claviger-group?), and they are tending Coccoid scale insects.

 
scale insects
I thought as much, but what mystifies me is what do the scale insects live on? It looked as though they were in the cluster for some time judging from the white fluff around them, so what do they feed on under a rock?

 
The sap-feeders overwinter wi
The sap-feeders overwinter without feeding with the ants that tend them. In spring they are distributed out to feed on tree and other roots, as in in this not-so-great picture I submitted last year:


You also might find of interest, this nicely illustrated blog post on subterranean ants and aphids

 
These were probably taken off
These were probably taken off their plant temporarily by the ants for some purpose...

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