L. quadra will form a second division in this Genus, since 

 the second joint of the palpus is as long as the first, and curved 

 upward : Bomhyx pulchella and 7'iibricollis Fab., with some 

 others, are included by that author and Latreille in the Genus 

 Lithosia, which has occasioned the latter to state that the 

 palpi are three-jointed, whereas Fabricius has described them 

 as biarticulate: after dissecting several specimens of our Genus, 

 and examining them most carefully, I can discover only two 

 joints ; B. pulchella and rubricollis, having three distinct joints 

 in the palpi, must therefore be constituted into a new Genus. 



The plant figured is Alisma Plantago (Great Water Plan- 

 tain), var. lanceolata. 



