The insects are ladybug larvae (lucky, lucky you!), and the spotting looks like it might be black sooty mold. If you had aphids on your cm (I've had them on both my Acomas for the last two years), then the fungus grows on the sticky honeydew the aphids leave behind.

When the cm drop their leaves, just rake them up, and next year they will be just fine. (That's if it is in fact the black sooty mold.)

Michelle

Ladybugs! Lucky me! I had forgotten they started off looking so different. Great, will do.