The Baby Heatscar Spider is a mob similar to the Heatscar Spider which spawns in the Nether. It is smaller and faster than the Heatscar Spider, and has greater jump height than Vanilla Spiders. It can still set you on fire, though for a shorter period of time. Use ranged attacks to dispatch them safely.
They spawn commonly in the Nether. They can be found in large amounts near adult Heatscar Spiders, though it is unknown whether the adult acts as a spawner, or if they simply spawn with the adult. When the adult dies, one to four Baby Heatscar Spiders appear in its place, which can create a large swarm very quickly.