158 PARASITOLOGY. 
arranged, point backwards. The hooklets are 
very small and resemble, in shape, those of a cat’s 
claw. The posterior half of the female is attenuated 
until it is no larger than a knitting needle; the female 
is eight to twelve inches long, the male three to four 
inches. 
Life Cycle.—The fe- 
male is oviparous; the 
eggs are oblong and 
contain fully developed 
embryos, in a few days 
after they have passed 
to the ground with the 
feces; if they are in- 
gested by the intermed- 
jiate host, which is the 
larva of the May bug 
(white worm or grub 
worms) they soon hatch 
in its digestive tract; Fis. 62—EcHiNoruymcuus Gicas. 
this embrre is very oe ee 
small and provided hooklets. 
with four small hook- eens eee 
lets with which it burrows through the intestinal wall 
and becomes encysted in the abdominal cavity ; when 
this cyst matures it contains the fully developed larva, 
which retains its vitality during the existence of the 
larval worm and has been noted still alive after 
metamorphosis into the perfect insect; it is possible 
that other invertebrates may act as an intermediate 
host; if the pig eats these white worms or May 
beetles containing the encysted larva, the young echi- 
norhynchus is set free by the process of digestion 
