Grasshopper blood contains only white blood cells or Haemocytes (15,000-60,000). It does not contain red blood cells. Haemocytes can be divided into three types. Prohemocyte, transitional hemocyte and giant hemocyte. Prohemocytes 6-9 mµ (23%), transitional hemocytes 9-19 mµ (68%) and giant hemocytes 19-23 mµ (9%).