Fig. 8. Salicylate concentration in haemolymph samples collected at the times indicated after injection of 0.1 µl of 100 mmol l^-1 salicylate into the haemocoel of 3rd instar larvae. Each line indicates a different larva. The dashed line was fit by linear regression (r²=0.998) and describes the decline in concentration of salicylate in four samples collected from a single larva. The corresponding equation is: [Salicylate]_h=-0.0105t+3.78, where [Salicylate]_h is haemolymph salicylate concentration in mmol l^-1 and t is in minutes.