Harvestman

Easily separated from spiders by the broad fusion of the two body segments, so that the body appears to be composed of a singular segment. Harvestmen do not possess silk glands, and can't spin webs. Unlike spiders, harvestmen lack venom glands associated with their chelicerae (mouthparts). Uniquely among the arachnids fertilization is direct: males of most taxa possess a penis (also referred to in the literature as pene, aedagus or intromittent organ). (information from BugGuide)