28 INSECT MISCELLANIES. 



during the summer of 1830 we found it at Havre de 

 Grace, infesting insects of the most different famihes. 

 It particularly abounded on the marbled butterfly {HijJ- 

 'paixhia Galathea^ Leach), so that many of them 

 were scarcely able to fly from the exhaustion caused by 

 these little blood-suckers ; and so pertinaciously did 

 they retain their hold, that several of them now ad- 

 here to the specimens of the butterfly in our cabinet. 



Marbled butterfly (Hipparclda Ga'athea) and caterpillar. 



What was most remarkable, although the ringlet 

 butterfly {H. Hijpercmthns) was plentiful at the same 

 time, and is similar in food and habits, not one of 

 the parasites was found on some hundreds which we 



