This interesting little insect has the trophi of Cryptophagus 

 (pi. 160), the antennas of Latridius (pi. 311), and pentamerous 

 tarsi ; whether, therefore, the Corticaridae ought to be consi- 

 dered as a modification of the Cryptophagi, as the Pselaphi are 

 of the Staphylinidae, or whether Paramecosoma alone should 

 be transferred to the Engidae, admits of doubt until other ge- 

 nera are dissected. Indeed these minute insects will require 

 the most rigorous investigation before we can hope to find 

 their actual affinities, and decide on the location of many whose 

 deviations from typical forms cause such an endless variety 

 amongst insects, and so often embarrass the scientific in their 

 attempts to form a natural arrangement. 



Mr. F. Walker first discovered P. bicolor at Southgate, and 

 Mr. Walton has since taken it in some abundance in July, off 

 Furze-bushes growing over the water near Knaresborough in 

 Yorkshire. 



The Plant is Arundo Phraginiies, Common Reed. 



