Third instar larvae expressing Trp1EP663 under the control of Scer\GAL4Pxn.PS have an increased number of sessile hemocytes. The number of hemocytes in circulation is also increased. The dorsal sessile hemocyte department is not disrupted. Sessile hemocytes accumulate along the dorsal vessel and spread through the cuticle. The lymph gland is not enlarged. Hemocyte shape is normal.