is erroneous, the latter apparently confining itself 

 to Europe in the Old World, while the former 

 seems peculiar to the southern regions of the New 

 World. 



Sp. 5, 6, and 7. — All of them originally be- 

 longing to Latreille's genus Megacephala and now 

 to Mr. Westwood's genus^ Tetracha, the major part 

 of the species inhabit North and South America as 

 well as some Islands of the New World : the fol- 

 lowing genera compose the family. 



Megacephalid^, Hope. 



Genera. Country. Typical Species. 



1 . Megacephala, Latreille Senegal C . Senegalensis, Linneus. 



2. Tetracha, Westwood N. & S. America C. Carolina, Linneus. 



3. Aniara, Hope Cayenne C. Sepulchralis, Fabricius. 



The Megacephalidae belong to the Old and New 

 World, the true type of the first genus is Meg. 

 Senegalensis, Lat ; which in the French Encyclo- 

 paedic, Mons. Serville has named Aptema, as it is 

 apterous. Meg. Euphratica and 4-signata, closely 

 allied to the former, are undoubtedly winged spe- 

 cies, we have therefore two sections of the group, 

 which may be described as follows. 



