56 Poisonous Arthropods 



Certain Aphididae contain a strongly irritating substance which 

 produces, not merely on mucous membranes but on outer skin, a 

 characteristic inflammation. 



It has been frequently reported that the larvae of the Eurpoean 

 cabbage butterfly, Pieris brassica, accidentally eaten by cows, horses, 

 ducks, and other domestic animals, cause severe colic, attempts to 

 vomit, paralysis of the hind legs, salivation, and stomatitis. On 

 postmortem there are to be found haemorrhagic gastro-enteritis, 

 splenitis, and nephritis. Robert has recently investigated the subject 

 and has found a poisonous substance in the blood of not only the 

 larvae but also the pupae. 



