1880.] J. Wood-Mason — ■Description of Parantirrhoea Marshalli. 



249 



rior one rudimentary ; submedian vein sinuous, short, terminating in the 

 wing membrane near the inner margin at about the level of the junction of 

 the basal and second fourth of the length of that margin, being, in fact, 

 hardly more developed than is the internal vein of the Papilionin^ as 

 compared with that of many Heterocerous Lepidoptera ; the first median 

 veinlet directed straight outwards and backwards, out of its normal course, 

 to the inner angle and supplying the place of the rudimentary subme- 

 dian ; on turning to the underside, it is seen that a narrow rounded lobe 

 of the functional sutural area about six times as long as it is broad is 

 folded back upon the under surface, to which it is firmly adherent ; this 

 lobe occupies the middle two-fourths of the length of the inner margin, 

 and is thickly clothed on its surface and fringed at its free edge with 

 firmly attached, long, and somewhat raised modified scales rendered conspi- 

 cuous by their rich dark brown colour and satiny lustre ; the outline of this 

 turned up lobe is marked out on the upperside by a curvilinear groove. 



Posterior wings tailed, subquadrate, with four distinct margins, viz., 

 a strongly and irregularly arched anterior margin, nearly straight external 

 and posterior margins, and an inner or abdominal margin, marked out by 

 the obtuse-angled apex, the tail, and the well-rounded anal angle ; with a 

 black oval sexual mark, divided by the submedian vein, near the anal 

 angle ; costal vein short and straight, terminating before, and the first 

 branch of the subcostal which originates close to the base of its vein ending 

 beyond, tlie middle of the lengtli of the anterior margin, the second branch 

 being given off before the middle of the discoidal cell and extending into 

 the apical angle ; 'discoidal' vein in the same straight or sliglitly curved 

 line with the subcostal ; discocellalar veinlet sinuous ; the third median 

 veinlet pi'oduced to a conspicuous tail. 



Antennas fine and distinctly clubbed. 



Female unknown. 



No Asiatic genus of Sattrikj3 presents us with any approach to the 

 remarkable arrangement of the two hindermost veins of the anterior wings 

 described above ; but, in the South American genus Antirrhoen, we meet 

 with identically the same arrangement, the first median veinlet in A. archaea 

 and its congeners running back to the inner angle and the submedian vein 

 ending a considerable distance short of that angle, though not nearly so far 

 short of it as in the Indian form, for which I propose the above name in 

 allusion to these remarkable points of resemblance, reserving all further 

 comparisons and comment until I shall be in possession of specimens of 

 the South American forms. 



