PLATE 5 
Platygaster vernalis 
A. —Section through an 18-day-old parasite in the polyblastula stage show¬ 
ing the embryos at the early blastula stage. The trophamnion becomes notice¬ 
ably vacuolated and surrounds the embryonic cavities on all sides. X1100. 
B. —Section through a 20-day-old parasite body, showing four normal embryos 
in the blastula stage, two paranuclear masses and two pseudogerms which are 
apparently degenerating because division of the parent germ was carried too far. 
X550. 
