Second-Instar Trap-Jaw Ant Larva (image) North Carolina State University Share Print E-Mail Caption These are the head and mouthparts of a trap-jaw ant 2nd instar larva. Credit Adrian Smith Usage Restrictions Photo credit must be given. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.