Phoneutria are poisonous to humans, and they are considered to be the deadliest of all the world's spiders. Their venom is toxic to the nervous system, causing symptoms such as salivation, irregular heartbeat, and prolonged, painful erections (priapism) in men.
A colon is used to demonstrate a list. In this case, you are listing the places where funding for libraries is not prioritized. Thus, it would be appropriate to insert a colon before it.
