﻿7oa 



The following is my own description of this species 

 from the examples figured on Plates 66a, 66b, and 66c, 

 the originals of which are in the rich Rothschildian col- 

 lection at Tring : — 



<? . Anterior wings intensely black, though shaded to 

 a slightly lighter tone towards the outer margin ; this 

 black is shot or suffused with a rich violet glow, which 

 can only be seen, when held in a certain position ; though 

 very difficult to be detected, it is nevertheless quite vivid 

 when discovered, and the glow of violet travels over the 

 wings almost from the base to the discal adnervular rays, 

 being even faintly visible over towards the outer margin, 

 as the insect is slowly moved by the hand ; the glow does 

 not extend above the subcostal nervure, or below the 

 submedian vein, or only very faintly ; a discal band of 

 whitish adnervular narrow rays commences at the 2nd 

 median nervule and continues up the wing almost to the 

 costa, curving inwards in position, and away from the 

 anterior angle, becoming faintly yellow as they approach 

 the costa, and yellow also at their inner ends. There 

 are about io, n, or 12 of them in all, for they slightly 

 vary in number in different examples of the species. The 

 marginal interrupted ciliae are slightly yellowish white, 

 and only faintly shown. The veins and discal folds are 

 fairly prominent, the pseudoneura of the cell only faintly 



Posterior wings rich silky golden -yellow, with a very 

 faint delicate green tinge towards the base ; the base 

 velvety black, and black outside the precostal nervure 

 which colour unites with the abdominal marginal black, 

 and also extends to the anal angle — the abdominal fold is 

 slightly accentuated down the middle of this black area ; 

 the posterior marginal black band extends from the apex to 

 the anal angle, and consists of 6 crescentic divisions of 

 moderate breadth ; the outline of wing is crescentic, with 

 yellowish white very slight marginal lunations ; all the 

 veins are intensely black, and a number of delicate faintly 

 dark hairs intrude from the base into the yellow of the 



Under surface of anterior Aving as above — the violet 

 glow being quite as rich as on the upper side of the wings ; 

 but the black of the wing is less dense, approaching more 

 nearly a warm dark-brown ; the white adnervular rays on 

 the disc are a little more prominent and with less yellow. 

 Under surface of posterior wings exactly as on the upper 

 side. 



Head, antennae and thorax velvety black ; eyes brown ; 

 abdomen, except the anal valves, greenish lemon-yellow, 

 with a broad longitudinal dorsal brownish - red band 

 slightly suffused with violet. A subtriangulate black 

 mark on the anal and penultimate segments ; the anal 

 valves pearly white, and the dorsum yellow, with the 

 usual row of lateral black dots ; the legs brown black ; and 

 there is no lateral red patch on the thorax, as in other 

 species. 



Length of costa, 79 mms. ; greatest Avidth of anterior 

 wing, 51 mms.; least width, 5 mms. Greatest length of 

 posterior wing, 54 mms. ; greatest width, 35 mms. Length 

 of abdomen and antennae equal, or 31 millimetres each ; 

 length of thorax and head, 31 mms. 



Length 

 of legs : 



1st pair : femur, 8 

 2nd ,, : ,, 10 

 3rd „ : , 



9 ; 



tibia, g ; 



)i 11 ; 

 „ 9; 



tarsi, 12 mms. 

 » 14 » 



Habitat. Sarawak, Sandakan, North Borneo. 



2 . Light form. Anterior wings, warm brown — slightly 

 darker at the base, and at the outer margin ; the veins 

 all black and prominent ; a submarginal, or rather discal 

 transverse row of short white adnervular rays, of which those 

 on the 3 median nervures are short, the next above longer, 

 and the others beyond to the subcosta longer and more 

 or less nebulous ; two short rays are also on the sub- 

 median vein ; the submedian and submarginal folds are 

 fairly prominent ; the pseudoneura in the discoidal cell are 

 also faintly expressed. Posterior wings black, with a 

 submarginal or discal band of yellow marks — those on the 

 2nd and 3rd median nervules rather large, widely separ- 

 ated from each other by the black of the wing, curved at 

 the sides, obtuse above, and indented below : the re- 

 mainder to the anterior angle continuous, lunate above 

 and below ; and 2 or 3 slight small triangulate spots at or 

 towards the anal angle— one of them being whitish, the 

 outer-marginal lunations are slight and ochraceous white ; 

 the abdominal fold, and the space between the 3rd median 

 and submedian vein with nebulous yellow white scales on 

 the black; the base of the wings to nearly i-3rd of the 

 cell black ; the rest of the cell and nearly i-6th of the 

 disc are yellow, the discal yellow so indented by the black 

 of the disc as (with the submarginal yellow marks above 

 described) to give' the black the appearance of a broad 

 central band of very large subovate marks or black cones 

 between, curving upward between the veins, as we see in 

 many of the other forms of the genus Pompeoptera ; the 

 veins are all very black and prominent on the yellow ; 

 and a tuft of faint dark hairs originates at the base and 

 slightly encroaches on the yellow of the cell, so as to 

 subdue its intensity. 



Underside of 2 . Anterior wing similar to the upper 

 surface, but the white rays are all broader, a little longer, 

 and slightly whiter ; with a few nebulous white atoms on 

 their inner ends ; a white nebulous mark is on the disco- 

 cellular nervule outside and inside the cell ; posterior 

 wing as on the upper surface except that the submarginal 

 or discal band is entirely continuous, and the veins as 

 they pass through the black discal area are edged with 

 yellow, thereby forming a distinct discal band of black 

 (almost) pear-shaped marks or cones ; abdominal margin 

 with yellow and whitish stripes and small spots. 



Head, antennas, and thorax velvety black ; eyes brown ; 

 pronotal collar yellow ; abdomen with broad warm brown ; 

 dorsum, shaded on each side by black, the margin of the 

 dorsum are greenish yellow, subdued by black atoms, and 

 the annulations are well defined by black. 



Abdomen slightly longer than antennae, or 34 mms. ; 

 thorax and head, 21 mms. 



t ,r1 1st pair : femur, 9 ; tibia, 

 L f e ^ th 2nd \, „ 12; „ 1 



g mms ; tarsi, 12 mms. 



of le § s; J 3 rd „ 



13 

 11 



Length of costa, 100 mms. ; of outer margin, 70 mms. ; 

 of inner margin, 55 mms. ; greatest length of posterior 



