Specimen showing the typical "holes". See a nicer series of the same specimens by Mr. Harald Grieb at:
The base of these critters looks almost identical to this photo posted as
whitefly pupa on oak leaves.
A journal article on
Aleuroplatus gelatinosus and
Redescription of two live oak-infesting whiteflies in California
On the underside of Southern live oak (Quercus virginiana) leaves. These critters remind me of whitefly pupae.
Update: I went to collect samples two days later (1/5/16) and viewed them under a microscope. All the specimens checked look like empty shells, but upon closer inspection the black structure at the base of the "shells" is probably the fourth instar or “pupa” of a whitefly in the genus Aleuroplatus. The structure at the base was not produced by the leaves, but by the insect and "glued" to the leaves. I doubt that all the holes are exit holes from a parasitoid because that would imply 100% parasitism; which I think is unlikely. These photos do not show the holes (except for the last one) because inadvertently were shot from the side opposite to the hole. I plan to check these trees in the spring and summer hoping to collect live bugs and photograph other developmental stages.
Also, I mailed samples to a whitefly expert and will provide updates here as soon as he determines this bug's identity.