The pupa goes through great changes both internally and externally. Privacy Policy 8. Similar species: Sitophilus granaries and Sitophilus zeamais. The adults are usually between 3 and 4.6 mm long, with a long snout. The pronotum is barely shorter than the elytra. It consumes several times its own weight and periodically moults to increase in size. Females are larger than males. Before pupation it may pass through pre-pupal stage for 1-2 days. 2020 © Copyright EcO2. Image Guidelines 5. Attack is evidenced by, //