1. The pellicle of ookinetes is bilayered. The outer coat is wrinkled and the inner coat is smooth.
2. At the tip of the body there are microscopic pores called cytostome. Through these pores, protein-degrading enzymes are secreted and cause damage to the crop of the mosquito.
3. Under the endoplasmic reticulum there are 55-56 microtubules. They are contractile-expandable and aid in movement.
4. Its nucleus is quite large, granular and irregular.
5. Cytoplasm dense and containing brown pigmented granules.
6. It contains mitochondria and ribosomes.