Photo No. 3. 
Wasp larvae — 
— Parasitic pupae 
from which flies 
have emerged. 
— Living pupae. 
“PAPER” NEST OF BELONOGASTER GRISEUS, Fabr. 
Showing larvae in unfinished cells; also pupae of parasitic muscid, some hatched and others intact. 
Photographed by Dr. G. van Someren. 
Photo No. 4. 
CONTENTS OF TWO CELLS, FROM NEST OF SCELIPHRON SPIRIFEX, Linn. 
The spiders are alive, but rendered helpless by poison from sting. 
The spiders marked + have the wasp’s egg attached. 
Photographed by Dr. G. van Someren. [To face p. 444 
