their base. Germar, who established the genus, has included 

 in it only 3 European species; namely, 1. B. Morio Linn. — 

 2. B. Detrita Esp. — and 3. B. Rubea Fab. To the first of these 

 our insect is so nearly related, that it was believed to be a male 

 of P. Morio : upon comparison, however, the following diffe- 

 rences are at once discernible : — the pectinations of the anten- 

 nae are shorter, the thorax and body are more robust, and 

 the latter is much shorter; the superior wings are longer and 

 narrower, and the nervures are different in their proportions. 



Few as the individuals are that compose this genus, they 

 do not quite agree in their habit. P. nigricans and P. Morio 

 being characterized by a different nervation of the wings to 

 the other two, and the female of the latter not agreeing in figure 

 with those of the remainder. 



It must be remembered, that none of the above insects have 

 been detected in Britain, excepting a male of the nondescript 

 species figured in the plate, which was beaten from a Birch- 

 tree, on the outside of West Parley coppice Dorsetshire, by 

 J. C. Dale, Esq., the 18th June 1824. 



I am indebted to the Rev. F. W. Hope for a specimen of 

 P. Morio ; and as the caterpillar of that insect feeds upon 

 Lolium perenne (Ray Grass), it has been added to the plate. 



