Spined larupia are found at the southern part of the Feldip Hunter area. Create a pitfall trap by using one set of logs from a nearby jungle tree with a knife on your tool belt. Click on one of the larupia to tease them, which makes them attack and follow you around. Walk over to your set up pitfall trap with the larupia right behind you and jump over it. The larupia will either walk over it and fall in, or it will jump over as well. If it jumps over, set up a new trap at a new spot (they won't go over the same pitfall trap twice in a row) and repeat the process until the larupia falls in. Collect a pair of big bones and either tatty larupia fur or larupia fur. If you get tatty fur, drop it and bury the bones, then continue to collect the non-tatty fur to sell on the Grand Exchange.