1920] Du Porte: Muscular System of Gryllus 33 



LVII, LVIIa. The Second and Third Metasternal Muscles 

 (Figs. 20 and 32). From the posterior side of the base of the 

 entosternite into the parasternal plate. Depressor of the 

 abdomen. [35]. 



56. The Fourth Metasternal (Fig. 20). From the posterior 

 side of the entosternal pocket, into the parasternal plate. 

 Retractor of the sternum. [36]. 



(b) Dorsal. 



57. The First Metanotal Muscle (Fig. 20). From the 

 anterior edge of the first abdominal tergite into the ento- 

 tergite of the metascutum. Parallel and adjacent to the median 

 line. In the long-winged female this muscle is often very 

 strongly developed. (Fig. 28). [37]. 



DORSOVENTRAL MUSCLES. 



(a) Tergo-sternals. 



58. The Metathoracic Intersegmental Muscle (Fig. 20) , 

 From the distal end of the entosternite into the first abdominal 

 tergite between the first and second dorsal longitudinal muscles, 

 Homologue of 21 and 37. Rotator of the thorax. [41]. 



(b) Noto-coxal. 



59. 59a. The First and Sixth Dorsoventral Muscles of the 

 Metathorax (Figs. 20 and 31). Extensors of the coxa. Homo- 

 logues of 38 and 38a, q. v. [42, 47]. 



•60, 60a. The Third and Fourth Dorsoventrals (Figs. 20 and 

 30). Flexors of the coxa. Homologues of 39, 39a, q. v. 

 [44, 45]. 



(c) Noto-trochanteric. 



61. (61a). The Fifth Dorsoventral and the Third Lateral 

 (Figs. 20 and 29). Extensors of the femur. See 40, 40a. 

 [46, 50]. 



PLEURAL MUSCLES. 



(a) Pleuro-pedal. 



61a. See above. [50]. 



62. The First and Second Lateral Muscles of the Metathorax 

 (Fig. 21). See 41. Elevator of wing. [48, 49]. 



63. The Fourth Lateral (Fig. 21). Homologue of 42 q. v. 

 [51]. 



