66 B. GfiASSI AND A. SANDIAS. 



the longitudinal dorsal anastomoses. Thus the transverse 

 anastomosis is formed by a branch springing directly from the 

 bronchus^ whereas the longitudinal dorsal and. ventral anasto- 

 moses, on the other hand, are formed by branches derived 

 indirectly from the bronchi. Similar anastomoses are found 

 in other Orthoptera (s, lat.), including the Termitidse. 



On one occasion I thought I had found a second dorsal 

 longitudinal anastomosis, but I have been unable to detect it a 

 second time, and think I must have been mistaken. 



The general arrangement of the thoracic trachese is a little 

 different from that in the abdomen, as can be partly seen in 

 the plates attached to this work. Two large trunks on either 

 side, as in Thysanura, run to the head. 



The anterior pair of stigmata are, as usual, larger than the 

 others, and the cuticular margins are obviously more developed, 

 so as to act perhaps as a sort of valve. I have been unable to 

 detect anything of the kind in the other stigmata. The spiral 

 thread of the trachese is very distinct. 



I have found nothing of importance in the vascular system. 

 The blood-corpuscles are usually subelliptical and crowded 

 with shining granules. 



The nervous system exhibits, as usual, a supra- oesophageal 

 ganglion, a ventral ganglionic chain (PI. 19, fig. 2), and a 

 stomato-gastric system ; the sympathetic is not distinct. The 

 supra-cesophageal ganglion possesses the usual median constric- 

 tion ; the optic lobes are small, lateral, and give oflF a fine and 

 rather long nerve to the compound eyes. The ventral gan- 

 glionic chain presents a sub-oesophageal, three thoracic and 

 seven abdominal ganglia. The three thoracic ganglia are large, 

 and correspond with the respective thoracic segments. The first 

 six abdominal ganglia are moderately small, the seventh is 

 larger. The first corresponds with the segment mediaire; 

 the second, third, and fourth with the second, third, and 

 fourth abdominal segments, the latter ganglion lying in the 

 posterior part of the segment ; the fifth segment has no 

 ganglion, so that the fifth, sixth, and seventh ganglia lie 

 respectively in the sixth, seventh, and eighth segments. The 



