On a currant-leaf in the foreground lies a caterpillar of the Magpie Moth 

 (Abraxas grossulariata), which has been pierced by a small Ichneumon (Micro- 

 gaster ylomeratui), black, with yellow legs, of which a magnified figure appears 

 flying upwards on the left. Its parasitic larva?, having fed upon the juices of 

 the caterpillar, have deserted its body, and spun around it their ovate silk 

 cocoons. Above these, descending on the right, is the large common Ichneu- 

 mon (Pimpla maniftstator) ; and high in the corner opposite ascends another 

 large species, black and orange, of the genus Ophion. 



PARASITES. 



" a plague, 



The better fed, the longer kept." 



HERE is a certain destructive tribe of insects 

 which may be seen everywhere ; and they 

 may be seen not only now, but at almost 

 every season. 



The varied species of insects which com- 

 pose this tribe differ widely both in magnitude and in strength ; 

 but they are, one arid all, according to their power, active, 



