contraction of the body; when they work separately, they bend the body; 

 they sometimes curve the abdomen ventrally and straighten it dorsally. 

 The first abdominal segment contains two small muscles on each side, 

 acting as retractors of the dorsal tubercle of the segment. 



[32) 



FIGURES 20-22. Musculature of the larva of Li m no phi lu s flavicornis (after Winkler): 



20 — adductor of the mandible and its branches; 21 — muscles of labrum and maxiliolabium; 

 22 — muscles of the thorax and first abdominal segment. 



ma - mandibular adductor, vim — ventral longitudinal muscle, dim — dorsal longitudinal 

 muscle, olm — occipitolateral muscle, otm — occipitothoracic muscle, mab — mandibular 

 abductor, mo — medial occipital muscle, t — tentorium, tmc — tentorial muscle of the 

 cardo, tm - tentorial mental muscles, tms — tentorial muscle of stipes, fl — frontolabral 

 muscle. 



5724 



28 



