. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 144 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY three thoracic ganglia appear to show serial homology, each in- nervating comparable structures in their respective segments. Figure 1 shows the relationship of the six prothoracic nerves to the prothoracic ganglion. Nervus prothoracicus primus () is a slender nerve arising from the anterior part of the ganglion. It is similar to "nerve a" of Malouf (1933). FI-" Fig. 7. Medial view of the left half of the prothorax, showing the inner- vation of th
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 144 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY three thoracic ganglia appear to show serial homology, each in- nervating comparable structures in their respective segments. Figure 1 shows the relationship of the six prothoracic nerves to the prothoracic ganglion. Nervus prothoracicus primus () is a slender nerve arising from the anterior part of the ganglion. It is similar to "nerve a" of Malouf (1933). FI-" Fig. 7. Medial view of the left half of the prothorax, showing the inner- vation of the medial muscles. The posterior parts of the head and hypo- pharyngeal wing are shown in place. The dorsal parts of Muscles E18 and .9, and the middle part of Muscles 6 and 7 are omitted. and Akbar (1958) ; Johansson (1957) termed it the "first pro- thoracic ; Very close to its base it is joined by the previously described nervus capitis-prothoracicus from the sub- esophageal ganglion (Figs. 5, 7). It then passes ventral to two of the depressor and retractor muscles of the head. Mm. prosterni primus et secundus (6 and 7), sending a short branch to these muscles. In the region medial to the occipital condyle of the head it gives off a branch which joins a long nerve, nervus capitis- mesothoracicus (), running from the mesothorax and pass-. 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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