Fig. 1. Anatomy of the locust (pro- and meso-) thorax. Muscles relevant in the present report are highlighted in reddish colours (adapted from fig. 8 in Campbell, 1961). Muscle numbers follow the Snodgrass terminology (Snodgrass, 1929). The nervous system is marked in blue. Note nerve supplies of muscles: M59 (sterno-pleural intersegmental muscle) supplied by a branch of N1B, M60 (2nd ventral longitudinal muscle) supplied by N1A₁, M61 (sterno-spinal muscle) supplied by N1A₂, M81 (dorsal longitudinal muscle) and M82 (oblique dorsal muscle) supplied by N1D₁ (for details, also see Fig. 6). The larval dorsal longitudinal muscle DLM3 (hidden) is located just below the posterior ventral corner of M81, indicated by grey shading. Scale bar, 1 mm.