Some Remarks on the Abdominal Air Sacs 
of Stenopelmatus 
EDITH M’CONNELL 
In a study of the general anatomy of Stenopelmatus some in- 
teresting things were noticed in regard to the tracher. The 
air saes of the abdominal region in comparison with those of 
the locust, as deseribed by Snodgrass ’03, are more like en- 
larged parts of the tracheal tubes and are rectangular in shape. 
wh 
Figure 1. Dorsal view of the dorsal tracheal air sacs of abdomen of Stenopelmatus. 
X3. 
A—Showing air sacs on left side with a variation in arrangement of 
anterior sacs of right side. 
B—Lateral longitudinal trachea. 
C—Variation in number and arrangement of posterior sacs. 
