. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 38 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY Action: Elevates the anterior part of the epipharynx, thus dilating the food pump. Similar muscle: Anterior part of Muscle Group 1 (Pelocorij^: Marks, 1959). 15. M. DILATOR CIBARII SECUNDUS (Figs. 13B, 26, 27) Similar, in appearance, to M. dilator cibarii primus. Origin: Inner surface of the dypeus, just posterior to M. dilator cibarii Figure 27. Lateral view of the cibarial and pharyngeal muscles. The head has been cut down the midline, and the left halves of the f
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 38 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY Action: Elevates the anterior part of the epipharynx, thus dilating the food pump. Similar muscle: Anterior part of Muscle Group 1 (Pelocorij^: Marks, 1959). 15. M. DILATOR CIBARII SECUNDUS (Figs. 13B, 26, 27) Similar, in appearance, to M. dilator cibarii primus. Origin: Inner surface of the dypeus, just posterior to M. dilator cibarii Figure 27. Lateral view of the cibarial and pharyngeal muscles. The head has been cut down the midline, and the left halves of the food pump, brain, and subesophageal ganglion are shown. The lateral part of the elypeus has been cut off, and the salivary pump is omitted. Figure 28. Medial view of the left antenna, with the medial walls of the scape and the pedicel removed to show the muscles. The cranial exoskeleton has been cut away from the medial side of the base of the antenna to reveal the articular membrane. Insertion: On the epipharyngeal tendons of Group 2, between the striated plates. Action: Elevates the epipharynx in the region of the striated plates, thus dilating the food pump; raises and lowers the striated plates. Similar muscle: Posterior part of Muscle Group 1 (Pelocoris; Marks, 1959).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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