To place traps, you must be raiding a dungeon with complexity level 4+.
A mastyx trap is made using the Fletching skill, by using a knife on a branch. A trap can then be placed on the floor in a room with a mastyx - a large, dinosaur-like creature - to trap it, ready for skinning. The higher the tier of the trap, the more likely you are to catch the mastyx. Although any tier trap can be used to trap any tier mastyx (Only if you have the Hunter level for the tier of the mastyx), it is definitely worth using a trap of a tier that is equal to or higher than the mastyx's tier.
|Tangle gum trap||1 / 3|
|Seeping elm trap||10 / 13|
|Blood spindle trap||20 / 23|
|Utuku trap||30 / 33|
|Spinebeam trap||40 / 43|
|Bovistrangler trap||50 / 53|
|Thigat trap||60 / 63|
|Corpsethorn trap||70 / 73|
|Entgallow trap||80 / 83|
|Grave creeper trap||90 / 93|
Once a bovimastyx has been caught using a trap, it is possible to use a knife on the carcass and gain a number of usable hides. You must have a suitable Hunter level to skin a carcass, and this Hunter requirement is not necessary if you simply kill the creature rather than trap it. These hides can then be used to make ranged equipment.
|Protomastyx||1||55||Big bones, Protomastyx hide|
|Submastyx||10||94.5||Big bones, Submastyx hide|
|Paramastyx||20||164||Big bones, Paramastyx hide|
|Archaemastyx||30||247||Big bones, Archaemastyx hide|
|Dromomastyx||40||330||Big bones, Dromomastyx hide|
|Spinomastyx||50||435.5||Big bones, Spinomastyx hide|
|Gallimastyx||60||519||Big bones, Gallimastyx hide|
|Stegomastyx||70||599.5||Big bones, Stegomastyx hide|
|Megamastyx||80||673||Big bones, Megamastyx hide|
|Tyrannomastyx||90||745.5||Big bones, Tyrannomastyx hide|