This very minute insect recedes from the typical groups of 

 Coleoptera, having only nine-jointed antennae and triarticu- 

 late tarsi ; it is, however, undoubtedly allied to Corticaria as 

 well as to Latridius (pi. 311.), with which it accords in the 

 shape of the antennae and in the numerical structure of the 

 tarsi. On a former occasion I stated an opinion that Holo- 

 paramecus might be the means of connecting the Corticaridae 

 with the Scydmaeni, an affinity which appears to be further 

 strengthened by the discovery of the genus Eutheia. 



I took a single specimen of Holoparamecus depressus many 

 years since running up the outside of a flour-mill in Norfolk, 

 which led me to believe that it fed upon grain ; but I have 

 since found several specimens amongst small pieces of decayed 

 wood and bark that came from Mexico I believe, and this ren- 

 ders it probable that it may live in the crevices and under the 

 bark of trees, and also that it is, like many other insects, an 

 imported species. 



The Plant appears to be Thlaspi arvense (IxeviclQ. Mustard). 



