1889.] 303 



$ . Upper-side resembles the female of Hecatceus, Q-odm. and Salv., but differs 

 as under : Upper-side : the patch in the cell and . the discoidal row of spots are 

 whiter, smaller, and less distinct, the marginal spots between the veins are very 

 much larger, whiter, and quadrate. Posterior-wings : the central band of spots is 

 much smaller, whiter, and indistinct, and extends only over the end of the cell, 

 instead of over the outer two-thirds of it ; the white patch on the abdominal fold is 

 almost obsolete ; the sub-marginal row of spots are more than double the size, 

 white outwardly, shading into ferruginous inwardly ; the white spot at the anal 

 angle is confluent with the spot above it ; the white marginal lunules between the 

 veins are very much larger. 



Under-side, as above, but more dusky ; the central band of 6pots on posterior- 

 wings smaller and less distinct. Exp., 6 in. 



Hob. : Rubiana Lagoon. 



The male differs from Hecatceus on the upper-side, chiefly in 

 having on the anterior-wings only an oblique, straight, subapical 

 band of spots, and a spot near the posterior angle, instead of the 

 curved row of spots which crosses the wings of Hecatceus, and other- 

 wise, as above described. 



Papilio Abiel. 



$ . Upper-side '• both wings black. Anterior-wings with a quadrate milky- 

 white patch a little beyond the end of the cell, another above it conical ; a very short 

 white line at the junction of the 4th and 5th subcostal nervules, and an indistinct 

 white line below the first-named patch. Posterior-wings, as in Laarchus, Godm. 

 and Salv., but the white band is narrower and less deeply serrated externally. The 

 ferruginous spot above the anal angle in Laarchus is in Ariel almost obsolete, and 

 there is a minute white spot at the anal angle, which is absent in Laarchus. 



Under-side : anterior-wings brownish-black, with three indistinct small patches 

 of whitish scales about half-way between the end of the cell and the apex ; small 

 triangular white spots on the margin between all the veins ; the small patch of 

 white scales between the lowest median nervule and the submedian nervure of 

 Laarchus is absent. Posterior-wings crossed beyond the cell by a row of seven 

 ill-defined milky-white lunules, the two middle and the upper lunules almost 

 obsolete, outside this row is a large ferruginous spot above the anal angle, followed 

 between the veins by four patches of blue scales, the uppermost nearly obsolete, and 

 at the apex a ferruginous indistinct patch ; between the lowest median nervule and 

 submedian nervure is a submarginal ferruginous patch, and a small white lunule 

 at the anal angle. Exp., 5| in. 



Hab. : Estrella Bay, Isabel Island. 



Differs from Laarchus chiefly in the smallness of the white patches 

 on the anterior-wings, and the central row of white spots on the under- 

 side of posterior-wings ; also from Ptolychus, Godm. and Salv., in the 

 same respects, as well as in the absence of the four white submarginal 

 lunules above the posterior angle on the upper-side of the anterior- 

 wings of that species ; the white band on the posterior-wings of 

 Ptolychus is also narrower, and does not extend into the cell. 



London : May, 1889. 



