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Oak gall - Disholcaspis quercusglobulus

Oak gall - Disholcaspis quercusglobulus
Cedar Rapids/ICNC, Linn County, Iowa, USA
December 18, 2009
Size: 9-10mm
On a white oak, terminal end of twigs, all over tree, I assume the hole means whatever was inside emerged.

Disholcaspis quercusglobulus
Moved from ID Request. Yes, those are emergence holes. Species of this genus typically emerge in the fall (whereas most other cynipids that I know of overwinter in their galls).