Journal of Entomology and Zoology . om the cephalicalKlominal region two large tracheal tubes run forward a shortdistance and then break u]) into bundles of very small of these fine tracheoles pass in masses forward to thethoracic and head region and into the central nervous chief bundles come to the ganglionic mass from caudalregions, the smaller more lateral l)undle is more superficial, itdivides into two smaller groups of tubules, a lateral and a me-di;ni. I*(«tli of tliose send tracheoles to the l)rain and some smallstrands run heyoiul up Into the upper regions of
Journal of Entomology and Zoology . om the cephalicalKlominal region two large tracheal tubes run forward a shortdistance and then break u]) into bundles of very small of these fine tracheoles pass in masses forward to thethoracic and head region and into the central nervous chief bundles come to the ganglionic mass from caudalregions, the smaller more lateral l)undle is more superficial, itdivides into two smaller groups of tubules, a lateral and a me-di;ni. I*(«tli of tliose send tracheoles to the l)rain and some smallstrands run heyoiul up Into the upper regions of the head. Themore ventral of the two cliief Inmdles of tracheoles also divides JOUKISTAL, OF ENTOMOLOGY AND ZOOLOGY 193 into two and these are distributed to tlie lateral medial portionsof the siib-esophageal mass of the nervous system. The tracheawithin the nervous system are not as abundant as in tracheoles pass through the brain and ganglion as straightor slightly curved lines. There is no branching or Figure S. Diagram of the tracheal supply to the central nervous system of Cheliferscabisculus. X50. The paper by Allen 04 on the anatomy of one of the Acarina isthe only one I have found referring to the tracheae in the centralnervous system of Araclmida. Sense Organs and Peripheral Nerves. Scattered or groupedsensory hairs are found over the surfaces of the body, especially 194 JOUKNAL OF ENTOMOLOGY AND ZOOLOGY
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