PARASITES DURING THEIR WHOLE LIFE. 



257 



larvsB of the Bhipiptera are developed at the expense of 

 the larvae of the wasp, suck their blood, swell, and their 

 skin remains adhering to the fourth segment. 







I'"ig. 78.— Black Stylops, female, showing Fig. 79.— Black Stylops, larva at its 

 the embryos in the abdomen. birth (from Blanchard). 



"When the rhipipterous insect is six millimetres in 

 length, it changes its skin the second time, and this 



