Pholcidae spiders.

The Pholcidae, or "Daddy long - legs" spiders are extremely thin, fragile spiders, with an average body length of 5.5mm in length, and a leg length of up to 30mm. These long leg lengths are at an advantage for the Pholcidae spiders when hunting other spiders, so that they go undetected whilst approaching its pray Another common means to capturing prey, is achieved by quiet the opposite of the first hunting method. The Pholcidae enters …

…due to the fact that there jaws arnt strong enough to penatrate human skin, and the venom dose is too small. The mating process amongst the Pholcidae spiders involves using the palps and the jaws to insert sperm into the female. The male increases its blood pressure within the palps so that sperm is pushed out through the embolue. Often the male spider will withdraw the palp, and chew it which helps in emptying it.