PEEETJTE. 113 



Fam. PAPILIONIMI*. 



Following Mr. Bates's arrangement of the Ehopalocera, the Papilionidse contains two 

 subfamilies — the Pierinse and Papilioninae. Both possess six perfect legs in each 

 sex ; the pupa is attached by the tail, and a girdle across the middle sustains it in 

 an upright position. Mr. Bates further adds that the wing-cells, at least in the hind 

 wings, are closed by perfect tubular nervules ; but we are not satisfied that this is 

 always the case, for the lower discocellular, in not a few instances, appears to be 

 atrophied in some part of its length. 



The two subfamilies may be further distinguished as follows : — 



Tibiae of anterior legs without leaf-like appendage; lower discocellular of 

 primaries placed at an angle to the median (except in some Dismorphia) ; 

 claws of all legs bifid Pierinjs. 



Tibise of anterior legs furnished with leaf -like appendage ; lower discocellular 

 of primaries in a line with the median ; claws simple (except in $ 

 Leptocercus) Papilioninae. 



Subfam. PIEMINjE. 



An examination of the American Pierinse has convinced us that Dismorphia and its 

 allies are widely separated from the rest of the subfamily. Making allowance for the 

 great modification of the shape of the wings due to the mimetic forms assumed by so 

 many of the species, there remain characters in the wing-neuration, and especially in 

 the structure of the male secondary organs, which point to their complete separation. 

 We propose therefore to divide the subfamily into two groups. 



Group PIERINA. 



Subcostal nervure of primaries two- or three-branched ; tegumen of the male with a 

 single central rod. 



A. Terminal joint of the palpi more or less elongated in both sexes. 

 a. Second subcostal branch of the primaries emitted near the apex. 



PEREUTE. 



Pereute, Herr.-Schaffer, Prodr. Syst. Lep. ii. p. 6 (1867) ; Butler, Cist. Ent. i. pp. 34, 55. 



This is a widely ranging Neotropical genus containing eight or nine species, of which 

 two are found in our country — one being the common P. charops, which spreads from 

 Southern Mexico to Peru, &c, and is found in the mountainous districts of all the 

 * See Mr. Bates's " Contributions to an Insect-Fauna of the Amazons Valley," Journ. Ent. i. p. 218. 



biol. cente.-amee., Rhopal., Vol. II., August 1889. q 



