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at the apex, only composed of one single joint; the claw entirely wanting; tarsus of the 

 Ilin ile scaly, five-jointed, the basal joint very long, with a stout long spine on each side at 

 the apex; the others very short, spiny at the sides, all, except the last, with a long stout 

 spine on each side near the apex, and a bunch of long hairs near the base ; fifth joint small, 

 pointed. Middle and posterior Legs robust, with the femora, tibia?, and tarsi about equal in 

 length ; the tibia? with a row of spines on each side below, the apical ones but little longer 

 than the others ; tarsi spiny below, the first joint longer than the others combined, second, third, 

 and fourth progressively shorter ; fifth about equal to the second. Claws simple, stout, curved. 

 Paronychia broad at the base, divided into two lacinia?, of which the outer is longer than the 

 inner, and mostly nearly as long as the claw, the inner slenderer curved inwards over the base 

 of the pulvillus. Pulvillus jointed, the basal joint narrower than the second, membranaceous ; 

 the second joint broad, corneous, the two combined about equal in length to the claws. 

 Abdomen short, not very stout. 



Larva unknown ? 



Pupa braced, slender, the head with two car-like tubercles. 



The present family, consisting of only one genus, I have not ventured to characterize it. Possibly other species 

 may be found having a braced pupa, the anterior feet imperfect, and the palpi distinctly triarticulate and convergent, 

 but which may want some characters of less importance, as the pulvillus and paronychia. At present it is impossible 

 to say what characters are those of the family, what are purely generic. 



The genus Ageronia seems to have little in common with the preceding family except its braced pupa. To Euploea 

 it is much more nearly allied, especially in the form of the anterior feet, and of the claws of the other pairs. One 

 section of it has another point of resemblance in the expanded inner margin of the anterior wing of the male. But 

 from Enplcea it is easily known by the difference in colouring, by its long convergent palpi, and the peculiar bend of 

 the subcostal nervule of the anterior wings at the end of the cell. 



Of the Lakvje we know nothing. That figured by Madame Merian as the larva of Ageronia Feronia evidently 

 belongs to one of the Morphidie. 



The Pupa of Ageronia Feronia is described by M. Lacordaire as being " longue d'unc pouce, asscz svelte, et 

 presentant tin masque ties bizarre a sa partie anterieure, avee deux longues oreillcttes dirigces en avant. Sa couleur 

 est d"un vert olive foucc, et comme veloute, avec une raie jaune longitudinal sur chacun de ses cotes.'' He states that 

 he several times found the pupa fixed to the wall of a house, attached like that of a Papilio by a transverse thread. 

 Unfortunately he never met with the larva. 



The Pef.fect INSECT has a short rapid flight, and constantly alights on trunks of trees. All the species whose 

 history are known, produce in Hying a sound which I have heard compared by a good observer, to the rustling of a 

 piece of parchment, to which also M. Lacordaire compares it. 



In his paper on the Diurnal Lepidoptera of Guiana, published in the second volume of ihe, Annals of the Entomological 

 Society of France, he remarks that the species of this genus " presentent le phenomenc, unique dans l'ordre, de 

 produire en volant un bruit pareil a celui d'un parchemin tres sec qu'on froisserait entrc les mains." 



Mr. Darwin, in his Researches in Geology and Natural History, has the following passage in regard to one species of 

 this genus. 



" I was much surprised at the habits of Papilio Feronia. This butterfly is not uncommon, and generally frequents 

 the orange groves. Although a high flyer, yet it very frequently alights on the trunks of trees. On these occasions 

 its head is invariably placed downwards : and its wings are expanded in an horizontal plane, instead of being folded 

 vertically, as is commonly the case. This is the only butterfly I have ever seen that uses its legs for running. No< 

 being aware of this fact, the insect more than once, as I cautiously approached with my forceps, shuttled on one side 



