This insectoid creature resembles a vaguely-humanoid scorpion without a stinger. It has scythe-like blades instead of pincers and a row of spines along its back.
AC 18, touch 13, flat-footed 16 (+2 Dex, +5 natural, +1 size)
Speed 30 ft., burrow 20 ft.
Str 10, Dex 14, Con 17, Int 1, Wis 13, Cha 6
Environment temperate or warm hills
Receptive (Ex) A hivespawn doesn't speak or understand any language, but creatures with telepathy can use that special quality to communicate with hivespawn as if they had a language.
Scythe-Like Claws (Ex) A hivespawn's scythe-shaped claws deal base and critical damage as if they were scythes designed for a creature one size smaller than the hivespawn, including that weapon's x4 critical multiplier.
Spines (Ex) A hivespawn can loose a number of dart-like spines indicated in its ranged attack from its body as a standard action with a toss of its head or a lash of its tail. Make an attack roll for each spine—all targets must be within 30 feet of each other. The spines have a range increment of 120 ft. The creature can launch only 24 spines in any 24-hour period.