Answer: Without a more complete description of the insects, I can only offer some general advice. If the insects are alligator shaped, they are probably ladybug larva. Ladybugs lay eggs on plants that play host to aphids so that when the eggs hatch the immature larvae will have a ready source of food. Since you're finding the insects on just one specific plant in the flower bed, and it happens to be one that is often fed upon by aphids, I'd guess the insects are immature ladybugs and you're wise not to try to control them. If the insects are shield shaped, with a distinctive triangle on the back, you may be dealing with Harlequin Plant Bugs. These guys feed on flowers, stems, and leaves, often producing white or yellow blotches, which can turn mushy with age. Instead of spraying an insecticide and putting the beneficial ladybugs at risk, you can handpick the plant feeding bugs, and remove them from the garden. You can keep ahead of the population if you monitor your plants on a daily basis, picking off destructive insects as soon as you discover them.
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