Ladybugs are a very good insect to have around a flower bed because they eat the larvae that the other insect such as squash beetle and moths place on the plants.
There are over 450 different species of the ladybug in North America.
You see, the average ladybug now a day is either orange or red with black spots on its shells. Ladybug comes in a form that is rarely seen, which is black all over with red spots on its shell. The ladybug is a very voracious predator against many insects that can ruin or tear apart a garden. The ladybug will search out larvae of main mites, beetles, and moths, but the lady will even feast on its young to survive when it is wintertime. To welcome the ladybug into your garden, you will need to plant daisies and alyssum herbs to attract them and invite them into your garden. The ladybug can get anywhere from 1/16 of an inch to 3/8 of an inch long in its lifetime. The life cycle of a ladybug from larvae to adult is usually 3-4 weeks, then the entire adult life cycle for the ladybug begins. The female ladybug can lay eggs under the leaves of the plants in the garden in as little as one day after becoming an adult. These larvae then begin to eat the moth and beetles larvae before they hatch.
Source of Information on Ladybugs