Smithsonian miscellaneous collections . al lateral muscle (figs. 13, 14).—A very large triangularmuscle arising laterally on the eighth tergum, its fibers spreading ven-trally to their insertions along the entire lateral margin of the eighthsternum (fig. 13). This muscle evidently corresponds with the second NO. 6 GRASSHOPPER ABDOMEN SNODGRASS 25 internal lateral of the preceding segments, the first being absent inthe eighth segment both in the female and the male (fig. 12). 231. First external lateral muscle (figs. 13, 14)-—A thick musclearising in the lower anterior angle of the eighth tergu
Smithsonian miscellaneous collections . al lateral muscle (figs. 13, 14).—A very large triangularmuscle arising laterally on the eighth tergum, its fibers spreading ven-trally to their insertions along the entire lateral margin of the eighthsternum (fig. 13). This muscle evidently corresponds with the second NO. 6 GRASSHOPPER ABDOMEN SNODGRASS 25 internal lateral of the preceding segments, the first being absent inthe eighth segment both in the female and the male (fig. 12). 231. First external lateral muscle (figs. 13, 14)-—A thick musclearising in the lower anterior angle of the eighth tergum, inserted an-teriorly on the outer face of the apodeme (Ap) of the eighth sternum. 2^2. Second external lateral muscle (figs. 13, 14).—A small musclearising on the lower part of the eighth tergum below the spiracle,inserted on the base of the apodeme of the eighth sternum. 23J. Third external lateral muscle.—Absent in the female. 254, 255. Muscles of the spiracle (figs. 13, 14).—Same as in thepreceding segments. VII VIII IX. 24-7 267 Fig. 12.—Muscles of the seventh, eighth, and ninth segments of the maleabdomen of Dissosteira Carolina, right side, inner view. The following muscles of the eighth segment of the female have norepresentatives in the male. 2j6. Short protractor of the ovipositor.—A short muscle with abroad base arising on the side of the eighth tergum anterior to 2jo(figs. 13, 14), inserted anteriorly on the anterior end of the apodemeof the ovipositor (fig. 17 A, C). 2§/. Anterior muscle of the median oviduct (fig. 13).—A slendermuscle arising on the end of the apodeme of the eighth sternum, ex-tending mesally to its insertion on the anterior end of the median ovi-duct. This muscle is absent in Melanoplus. 2^8. Posterior muscle of the median oviduct (fig. 13).—A longflat muscle arising on the end of the apodeme of the eighth sternum,extending mesally and posteriorly to the posterior end of the medianoviduct. 2b SMITHSONIAN MISCELLANEOUS COLLECT
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