( 6 ) 
Figures 4 and 5 show respectively the muscles inside and 
the prickles outside the maggot after its final moult, by means 
of which they move about and keep up a constant irritation. 
Fig. 4.—Muscles of maggot, 
much magnified. 
Fig. 5.—Prickles of maggot, 
much magnified. 
What the pain is to the animals, I can only estimate from 
surgical and personal report of human sufferers under attack of 
a very similar grub in South America and the West Indies. This 
is described as inflammation accompanying the swelling, after¬ 
wards “ intense itching,” in addition to the pain of an ordinary 
sore. In another case, the pain was not constant, but at times 
sharp, as if the maggot was “ screwing ” itself round in its hole. 
Fig. 6.—Portion of inside of tanned warbled hide. 
Going on to the result of this to the hide alone, fig. 6 shows 
the ruined state of a badly warbled hide, or of what often 
