Although these insects have been indiided in various Ge- 

 nera by different authors, the accurate characters laid down 

 by Latreille in his admirable " Genera Crustaceorum" &c. will, 

 without any diflficulty, enable us to distinguish them from all 

 others. The most obvious peculiarities are the long and cu- 

 riously serrated spines attached to the short posterior tibiae, 

 which probably assist these insects to skip in the singular way 

 they do when disturbed, very much in the manner of the Mor- 

 dellae and Anaspides. 



There seem to be but two species known, both of which 

 are inhabitants of Britain. 



1. O. micans Fah. — Payk. — Lat. — Panz. 16. 18. — picea 

 Herbst. — Boleti Marsh. — clavicornis Lat. 



I once found this insect in abundance beneath moist Boleti, 

 attached to the trunks of Elm-trees in Norfolk, in the month 

 of June ; and dropping as soon as the Boletus was touched, it 

 became necessary to hold a net beneath, into which they fell 

 and skipped about like shrimps. 



2. O. fasciata PayJc. Nob. 



No figure of this pretty and rare Beetle having been before 

 given, we are not positive that it is Paykull's insect, although 

 there can be little doubt that it is a mere variety of that spe- 

 cies. 



Mr. Dale beat a specimen out of a White- thorn near Lynd- 

 hurst in the New Forest, the 1st of June 1824-, and we believe 

 that other specimens have been taken on the same ground. 



The plant is Malva moschata (Musk Mallow). 



