28 INSECT MISCELLANIES. 



during the summer of 1830 we found it at Havre de 

 Grace, infesting insects of the most different families. 

 It particularly abounded on the marbled butterfly (Hip- 

 parchia 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 (Hipparchia Galathea) and caterpillar. 



What was most remarkable, although the ringlet 

 butterfly (H. Hyperanthus) 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 



