The pectinations of the antennae in the males, which give a 

 robust and compressed appearance to them, will enable us to 

 distinguish the individuals that compose this genus, which ap- 

 proaches very near to Cleora, and appears to be conterminous, 

 and to unite the extensive groups designated as Geometra and 

 Phalccna by Mr. Haworth and other authors. The shortness 

 of the palpi (which are often nearly vertical, the ends only ap- 

 pearing from above) and the high point of insertion of the 

 maxillae are peculiar, as well as the clavate posterior legs of 

 the males, which is, however, a partial character, not being 

 very evident in C operaria^ although it is in the type. 

 The British species that this genus comprises are, 



1. Charissa operaria Hiib. — Nob. 



2. serotinaria Hiib. — Hatv. Lep. Brit. 311. 107. 



3. pullaria Hiib. — Hatso. Lep. Brit. 314. 115. — 



Phalsena quadripustulana Don. Brit. Ins. 

 V. 13.pl. 463. 



4. obscuraria Hiib. — Haw. Lep. Brit. 314. 116. 

 On the 26th July, whilst at the Isle of Bute, I took 2 males 



(one of which is figured) of Charissa operaria : Mr. Dale cap- 

 tured 2 others and a female soon after in the Isle of Arran. 

 The species of this genus are generally attached to heathy si- 

 tuations : our insect secreted itself amona-st the stones of the 



o 



walls so peculiar to the North, and upon being disturbed took 

 shelter amongst the fern during the day ; and in the evening 

 we never saw them. 



The hills in Bute were covered with heath, upon which we 

 found C. operaria ,- and about a mile from Rothsay, the plant 

 figured, Gentiana campestris^FioiA Gentian), was in flower there 

 at the time. 



