ENTOMOLOGICAL TRAVELS IN NORWAY. 21 



great many metamorphoses, and amongst them one very re- 

 markable, and perhaps the greatest prize in my whole journey. 

 I found on a completely developed Cicadellina, Typhlocyha 

 sp., a case attached externally to the second abdominal 

 segment, as large as the abdomen itself and containing a 

 parasite. After this has caused the death of the Cicadellina, 

 the case is torn open and a lively larva rushes out, which 

 spins up in the ground. Such an instance, in my whole ex- 

 perience of the metamorphoses and the manners of parasites, 

 I had not hitherto met with. 



