544 
Addendum 
seldom moved, but appeared to be healthy, though exposed iu the 
manner illustrated in Plate XXX, Fig. 15. On May 22, 1916, they 
passed large quantities of excrement, and had changed into pupae by 
May 30. 
The males of M. acasta possess rudimentary eyes and wings, and 
do not seem to leave the puparia in which they develop. The females, 
which have well-developed compound eyes and large wings, emerge by 
gnawing small round holes in the puparia (PL XXX, Fig. 10). They 
were often seen to pass back into the puparia through these holes. 
They are very active, and live at least four weeks when con fi ned in 
tubes. In one case a female gnawed a gallery 3 mm. long through the 
cork of a tube and escaped, and about 40 others, which were in the tube, 
also escaped by this means. 
Females, whether obtained from puparia containing males or from 
puparia in which no males had developed, began to oviposit when fly 
pupae of various ages, both healthy and parasitised by braconids, were 
placed in their tubes. The process of forcing the ovipositor through the 
wall of a pupa sometimes occupied as long as two hours. In one in¬ 
stance a puparium, previously parasitised by braconids, was opened 
after a female had ceased ovipositing in it, and one egg was found 
attached to the abdomen of a pupa of A. cephalotes. A larva emerged 
in 24 hours, and developed rapidly during the next two days, remaining 
attached at the same spot during the whole period. From some of 
these puparia adults have emerged one month after eggs were deposited 
in them. 
