An Introduction to Entomology : Vol. IV (of 4)
"[...]often divide and subdivide, and terminate in numerous ramifications that connect every part of the body with the sensorium commune. A pair of nerves is the most usual number that proceeds from each side of a ganglion; but this is by no means constant, since in the louse, the hive-bee, and several other insects, only a single nerve thus proceeds; and in the larva of Ephemerae, while two pairs issue from the six first ganglions, only a single one is emitted by the five last. In the spinal marrow of the rhinoceros-beetle, both larva and imago, the nerves consist of simple filaments which diverge like rays in all directions: the same circumstance distinguishes the cheese-maggot, only some of the nerves appear to branch at the end: in the louse, the last ganglion sends forth posteriorly three pairs of nerves which render to the abdomen. Sometimes, though rarely, nerves[...].""
- Paperback | 642 pages
- 152.4 x 228.6 x 30.99mm | 893.57g
- 11 May 2015
- Createspace Independent Publishing Platform
- United States
- black & white illustrations