. Annals. Entomology. Fig- 3- Fig. 4. Fig. 3. Third thoracic ganglion from below. Methylene blue. x30. Fig. 4. Connective branch leading off between the 2d and 3d thoracic ganglia, nerve fibers from above and below enter the nerve trunk from the connective. Also large and small nerve fibers shown. Methylene blue. x45. Tracts from the first abdominal pass up the outside of the con- nective and cross over into the middle line, but from the third thoracic to the second, and from the connectives of the second to the first no such tract was clearly recognized. Fibers enter- ing laterally both from
. Annals. Entomology. Fig- 3- Fig. 4. Fig. 3. Third thoracic ganglion from below. Methylene blue. x30. Fig. 4. Connective branch leading off between the 2d and 3d thoracic ganglia, nerve fibers from above and below enter the nerve trunk from the connective. Also large and small nerve fibers shown. Methylene blue. x45. Tracts from the first abdominal pass up the outside of the con- nective and cross over into the middle line, but from the third thoracic to the second, and from the connectives of the second to the first no such tract was clearly recognized. Fibers enter- ing laterally both from motor and sensory nerves all pass in towards the central part of the ganglion. In other words there was no indication of a tract passing from cephalic branches into the edge of the ganglion to run without termination up the out- side of the connective to the next center. But there was an indication of fibers passing through or into one ganglion from the one below it. In the cephalic part of the thoracic ganglia fibers coming from above may some of them be traced as a fine tract ending. 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 Entomological Society of America. Baltimore [etc. ]
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