Multiattack. The Wyvern Wasp attacks twice with its sting or bite, or once with its sting and once with its bite. 

Bite. Melee Weapon Attack: +5 to hit, 15 (2d6+3) slashing damage on hit.

Sting. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 5 (1d6 + 2) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 10 (3d6) poison damage on a failed save, or half as much damage on a successful one. If the poison damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.