66 PLATE CCCLXXXI1I. 



another fpecies ©f Pyrochroa already figured in this work*, our P. coc~ 

 cinea, and P. rubens of Fabricius. On a ilight companion, the differ- 

 ence is however obvious, Pyrochroa rubra being rather larger ; the fan- 

 guineous colour of the fuperior furface is alfo fomewhat brighter, and 

 the head of a deep black as ia the lower furface of the body, while the 

 head of our P. Coccinea is of the fame red colour as the thorax, and 

 wing-cafes. — Notwithstanding thofe differences, it mould be obferved, 

 that fome doubts ftill remain whether they are diftinct fpecies : the 

 two fexes of the fame fpecies, or only mere varieties. We think them 

 diftin6t, but Fabricius, upon whofe authority principally they have been 

 feparated by molt late writers, is not perfectly fatisfied that they are fo. 

 The molt diftinguiming feature of the two infects coniifts in one hav- 

 ing the head red, and the other black. 



This infect is found on rotten willows. 



* PI. 56. fie. 1. 



PLATE 



