CHEESE MITES, ETC, 



271 



CASE this species on Septmoncel cheese; eight or ten per cent, on 

 ^^^' Roquefort, and somewhat more on Gruyere. MM. Laboulbene 



Tyrogiyphus longior. 

 Copied from Fumouse and Robin's figure. 



and Robin tried the experiment of placing some of this species 

 along with T. siro, taken from Roquefort cheese, on flour in a 

 state of putrefaction, but the T. longior did not take to it or 

 multiply as T. siro did, but all died in the course of a day or two; a 

 circumstance the more to be noted that they can fast with ease. 

 M. Fumouse kept them for more than a month without food, and 

 they were as lively at the end as at the beginning of their fast. 

 This is the species that is most commonly met with in stores of 

 Cantharides, which are very subject to the attacks of mites (T. 

 siro among others). M. Fumouse has followed the development 

 of this species. In order to observe them, he placed a certain 

 number of individuals with small portions of Cantharides between 

 two plates of glass, separated the one from the other by a circular 

 band of cardboard. He had thus a small glass cage, whose trans- 



