. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 174 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY the motor deutocerebrum (MD). Both Pflugfelder (1936-37) and Johansson (1957) observed two parts to the motor branch of the antennal nerve, but these could not be distinguished in the Gelastocoris material. SD HI7A Fig. 21. Frontal section through the deutocerebrum, tritocerebrum, sub- esophageal ganglion, and prothoracic ganglion of an adult gelastoeorid. Neuropile is stippled; muscles, gut, and regions of ganglion cells are un- stippled. 120 X. The reduction of
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 174 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY the motor deutocerebrum (MD). Both Pflugfelder (1936-37) and Johansson (1957) observed two parts to the motor branch of the antennal nerve, but these could not be distinguished in the Gelastocoris material. SD HI7A Fig. 21. Frontal section through the deutocerebrum, tritocerebrum, sub- esophageal ganglion, and prothoracic ganglion of an adult gelastoeorid. Neuropile is stippled; muscles, gut, and regions of ganglion cells are un- stippled. 120 X. The reduction of the motor part of the deutocerebrum oL' Gelastocoris may be correlated with the shortness of the anten- nae. The sensory part appears to be much better developed, and it quite probably supplies antennal sense organs of some sort. Within the antenna the nervus aiitennalis runs through all four segments; since only the basal segment contains muscles (Par- sons, 1959), it seems that the distal part of the nerve is chiefly. 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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