I!l <TACEA>- 243 



An ovarium, consisting of about eight white capsules, baa appeared 

 on tin- thorax. 



As the | !! -rilling aiiiinal, tlio Asellus, feeds exclusively on decaying 

 leaves, so does the Mi>tenam-e of the Limnnria tercbrant seem to be de- 



i entirely from the wooden pile- \\hieh it is destroying. 



Its ravages consist of innumerable channels or galleries, perforating 

 the wood, until its substance is so much reduced as to full to pieces, or be 

 washed away by the waves. 



Various expedients have been suggested and adopted for counteract- 

 ing the e\il. though hitherto without the slightest success ; but one im- 

 portant experiment, ami that which should promise most, has been yet 

 overlooked. It is well known that all the insert tribes are most fastidi- 

 ous in the choice of their food. Multitudes arc continually perishing 

 when the sustenance most appropriate is unattainable. Therefore, were 

 the Chain 1'iei. the pillars, abutments, or other parts, constructed of piles 

 or prisms comprising several different species of wood, that alone which 

 was grateful to the animals would be the subject of their attacks. 

 Whence, by allowing a considerable interval, the kind escaping entirely, 

 or the least injured, would be discovered by inspection. 



It is not improbable that the enigma would be solved by a single 

 experiment. 



PLATE LXV. 



Flo. 7. Limnoria ttrebrcnt, back. 



8. Under surface. 



9. Head. 



10. Head, shewing the eye* and antcniue. 



1 1 . One of the antennae more enlarged. 

 Limb. 



13. Eye. 



14. Cluster of ova. 



15. Ovarium more enlarged. 



All the preceding figure* are enlarged. 



