SUICIDE OF SCORPIONS. 
27 
In the woodcut, fig. A, the post-anal " sting," is shown as 
though its wall were transparent, a is the last tail somite, 
h the post-anal " sting," d marks the position occupied by 
the poison sac of one side (that of the other side is not 
shown). The sacs have each a narrow duct, and the ducts 
open on the dorsal surface at some little distance from the 
actual point of the sting as shown in fig. B ; fig. C. repre- 
sents a section through x y (fig. A). The glands of the right 
and left sides, /, are seen each invested by its muscular coat 
k. By taking hold of the " sting " with a pair of forceps 
all the poison can be forced out from the apertures (fig. 
B, /). When I have wished to sting an animal, I have 
taken hold of the sting in this manner and, after inserting 
the point, have squeezed it, a method which when applied to 
animals affected by the scorpion poison has always proved 
effective. 
My experiments and observations fall under the following 
heads : — 
Series A. — Scorpions made to sting themselves. 
,, B. — Scorpions made to sting other scorpions. 
„ C. — Scoi'pions made to sting various other animals 
with the view of ascertainingthe action of the 
poison on these animals and of demonstrat- 
ing that the method of stinging employed 
was effective. 
„ D. — Observations on scorpions stinging one 
another during a fight. 
„ E. — Experiments to explain statements of pre- 
vious observers. 
Serit's A. — I have repeatedly taken hold of the sting of a 
scorpion in the manner described above, and having inserted 
the point into some part of the body, either between two 
terga or between the terga and sterna, or into a joint in the 
leg, have then squeezed out the poison, but the scorpion has 
