Lloyd's natural history. 



of the accompanying woodcut, which represents the neuration 

 of Ageronia, 



To begin with, then, all Butterflies have four wings, two on 

 each side. The first pair is called the fore-wings, the front 

 wings, the anterior wings, or in Latin, as it is useful to 

 remember, "alae antica;." The second pair are called hind- 

 wings, or posterior wings, in Latin " aloe posticse." Many 

 authors write " primaries " and " secondaries " as equivalent to 

 fore- and hind-wings ; but the use of these terms ought to be 



abandoned, because they are m universal employment in a 

 totally different sense in Birds. 



The fore-wings are generally roughly triangular in shape. The 

 narrow end which joins on to the body is called the base; the 

 fore-wings being attached to the sides of the meso-thorax, and the 

 hind-wings to the side of the meta-thorax. The front edge 

 of the wings is called the costa ; it is generally more or less 

 strongly arched, and in Butterflies is very rare 1 )' slightly concave. 

 In a few genera, e.g., Charaxes and Prioneris, it is serrated 



