Is this the result of spider mites on my Aganisia cyanea?
 

I posted about this under my thread in the Maxillaria alliance but figure I should post here as well.

This was it in bud about a month or so ago:
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Here's how the blooms turned out:
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Then after the blooms died, which they did quickly, in part b/c I pollinated two of them, this is what happened to the leaf on the last growth:
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Any idea what this is? Is it spider mites? Lord help me if it is b/c this plant has been cozied up among the others!

I dont know but I think it might be aphids, maybe someone with more experience can chip in.

Others have suggested taking a damp white paper towel and wiping the leaf/leaves affected. If the paper towel has red/brown dots or smears, you probably are dealing with mites.

I've had mites blast buds and brown areas of leaves, so it may be that. Picture 5 does seem to show the silvering of the leaf underside that mites produce, but my experience isn't broad enough to say for sure.

Either way, I'll say spray the plants with alcohol or hydrogen peroxide and and rinse it after a few minutes. Then potted with fresh new media.

Anthraknose caused by Colletotrichum gloeosporioides, a fungal infection that prefers warm air and high humidity and is spread by water.
I'd cut away the dark spot with a sharp razor blade in order to prevent the fungus from forming spores.
Lower humidity and improve air movement. Eventually use a fungicide like Azoxystrobin.

Spider mite damage leaves areas where the leaves look bleached out and the texture upon close inspection is uneven. Getting rid of them takes a few applications of insecticide to get rid of all stage forms of the insect from egg to mature adult.