A species of stinging caterpillar more common in southern climates appears to have arrived on the Eastern Shore. Francis Breeding, a pest management consultant with the Queen Anne’s County Extension Office, says a woman needed medical treatment last week because venom from a puss caterpillar traveled up her arm to her lymph nodes. Breeding says puss caterpillars do not bite, but their hair contains the venom. Extension specialists say some people are more sensitive to the caterpillars than others, but children should be told not to touch them.