. Smithsonian miscellaneous collections. converted mostly into sclerotic strands tobrace the pull of the mesothoracic ventral muscles {60, 8y, 88) on thesternal plates of the prothorax. The following thirteen muscles (118 to 130) are muscles of themetacoxa and the hind wing. 776. Tergal promotor of the coxa (figs. 34, 38 A).—Lies immedi-ately behind the tergo-sternal (fig. 34, 113). Arises dorsally on lateralarea of scutum (fig. 38 A) ; inserted ventrally on apodemal disc ofanterior angle of coxa (fig. 38 D, F, 118). iiQ. First tergal remotor of the coxa (figs. 34, 38 A).—A largemuscle arising
. Smithsonian miscellaneous collections. converted mostly into sclerotic strands tobrace the pull of the mesothoracic ventral muscles {60, 8y, 88) on thesternal plates of the prothorax. The following thirteen muscles (118 to 130) are muscles of themetacoxa and the hind wing. 776. Tergal promotor of the coxa (figs. 34, 38 A).—Lies immedi-ately behind the tergo-sternal (fig. 34, 113). Arises dorsally on lateralarea of scutum (fig. 38 A) ; inserted ventrally on apodemal disc ofanterior angle of coxa (fig. 38 D, F, 118). iiQ. First tergal remotor of the coxa (figs. 34, 38 A).—A largemuscle arising from posterior scutal margin ; goes downward andposteriorly, behind pleural arm, to ajXDdemal disc on posterior innerangle of coxa (fig. 38 D, F, 779). 120. Second tergal remotor of the coxa (figs. 34, 38 A).—A slendermuscle lying close behind 779, ta])ering ventrally to slender apodemearising from extreme posterior angle of coxa (fig. 38 B, D, F, 120). 68 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 82 2Ba WP,, Sa 114-iBa JhC^^^/. Fig. 38.—Muscles of the hind coxa and trochanter of Dissosfeira. A, tergal muscles of leg base, and the tergo-sternal muscle (113), right side,inner view. B, sternal and coxal muscles of basalar and subalar sclerites (iBa, sBa. Sa). C, abductor muscles of coxa. D, general view of muscle attachments on base of right coxa, inner view. E, sternal muscles of leg base, dorsal view. F, coxal muscle attachments, dorsal view. NO. 2 THORACIC MECHANISM OF A GRASSHOPPER—SNODGRASS 69 The innermost series of lateral muscles includes two body branchesof the trochanteral depressor (fig. 38 A, /Jjc) which will be describedlater. By removing the muscles attached on the tergum, there is ex-posed the outer series of pleural lateral muscles pertaining to the legand wing, and the sternal muscles of the coxa. 121. Anterior rotator of the coxa (figs. 34, 35, 38 E).—A largemuscle with fibers arising in two groups, one from lateral part of ster-num before base of
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