JOURNAL OF ENTOMOLOGY AND ZOOLOGY 193 
into two and these are distributed to the lateral medial portions 
of the sub-esophageal mass of the nervous system. The trachea 
within the nervous system are not as abundant as in insects. 
Long tracheoles pass through the brain and ganglion as straight 
or slightly curved lines. There is no branching or anastomosis. 
Figure 2. Diagram of the tracheal supply to the central nervous system of Chelifer 
scabisculus. X50. 
The paper by Allen ’04 on the anatomy of one of the Acarina is 
the only one I have found referring to the tracheex in the central 
nervous system of Arachnida. 
Sense OrGANS AND PeripHERAL Nerves. Scattered or grouped 
sensory hairs are found over the surfaces of the body, especially 
