35 



nervules (and divided by them), and extending to the 

 submedian, becoming fewer and more scattered, and 

 directed nearer towards the sexual velvet patch ; a few 

 scales also above the 2nd discoidal nervule ; the lemon 

 orange band broadest at the deepest part of discoidal cell 

 (9 mm) ; the whole discocellular portion of band somewhat 

 resembling the pine pattern of an Indian shawl ; the base is 

 also broader without the cell (10 mm.) ; much more (and 

 more uniformly) executed or rather scalloped, and 

 broader at its termination near the anterior angle. Behind 

 the band at broadest and outside the cell is a small group 

 of lemon orange atoms ; parallel with the submedian 

 nervule is a line of atoms ; and the orange band within 

 the interior margin is broader than that in the plate, the 

 internal nervules strongly dividing it half way ; the semi- 

 diaph. spots on the secondaries within disco, cell and 

 below costal and sub-costal nervure larger and more 

 definite in form than in the plate ; the spot between first 

 and second subcostal nervules nearly fills the white space 

 and is sinuate. Between the discoidal and first median 

 and first and second median nervules, no spots ; a small 

 black spot between second subcostal and discoidal nervules; 

 on the left wing is a trace of the second black dot nearly 

 as large between discoidal and median nervules ; but not 

 on the right wing. On the upper wing the band from first 

 disco-cellular nervule becomes more green till it reaches 

 the anterior angle ; the border of black on anterior margin 

 also broader at midway from same point towards the apex. 

 Abdomen rich lemon with lateral greenish shades, and 

 brownish dark cloudy streaks in the centre between each 

 segment. The black of wings very deep, undersides differ 

 little from the fig., except that the colour of the green is 

 more golden, and an extra atomic spot occurs between the 

 third and fourth subcostal nervules, and a marginal spot of 

 green atoms, the latter large and triangulate. Length of 

 costa, 84 ; of hind wing, 41 ; and of abdomen and antennae, 

 34 mm. ; Hab. ? Received from Dr. Staudinger ; and 

 probably bred in Amboyna. 



S . In the one described by Dr. Fickert he points out an 

 asymmetrical difference in the number of spots of the hind 

 wings — the discal black spots on right wing being seven ; 

 and six on the left. We shall see later on that both $ <7 

 and 2 2 of most of the species are occasionally asymmetrical, 

 and of course this feature occurs throughout nearly the 

 whole of the diurnal lepidoptera more often than might be 

 supposed, without close examination. 



$ . In the museum of Messrs. Godman and Salvin is a var. 

 of extraordinary beauty and interest collected in Batchian 

 by Dr. Plater (colored figs, of which will be found in the 2nd 

 plate devoted to this species) , in which the brilliant lemon 

 orange is so intensely shot with a warm green identical with 

 that found on the $ of O.(Mtheoptera) Tithonus of de Haan, 

 so much so that when viewed obliquely against the light the 

 whole of the yellow except the golden marks of the lower 

 wings, is a rich warm green, being most intense on the sub- 

 costal band, and causing it to be a more gloriously green 

 insect than O.Aruana. It is remarkable that the yellow 

 of tithonus is shot in the same way, though not with quite 

 the same intensity. Viewed opposite the light the orange 

 is incomparably fiery in its tone ; the median nervure is 

 broadly black with atoms ; the thoracic longitudinal stripe 

 is bluish metallic green. On the under surfaces, the green 

 is of the same character as above ; but the markings are 

 smaller and more elegant, as may be seen by reference to 

 the figures in the plate. 



See the same plate for variations of the 2 in this 

 collection. 



MEASUREMENTS. 



$ , In Mr. Horniman'scoll. ; (original of my fig.) length of 

 costa 85 ; of lower wing 48 ; of antennae and abdomen 35 ; 

 of thorax 16 ; of collar 8 ; and of head 4 mm. Width of 

 upper wing 43 ; of lower wing 36 ; of abdomen 5 ; of thorax 

 11 ; of collar 6 ; and of head 9 mm. 



S . Felder's fig., length of costa 83 ; hind wing 42 or 

 43; antennae 35 mm. (the abdomen is drawn too long). 

 Breadth of upper wings about 41 ; lower wings about 36 

 mm. 



$ . Type in Brit. Mus. : length of costa 85 ; antennae and 

 abdomen 32 ; thorax (including collar and head 26 ; width 

 of lower wings 31 mm. 



2 . Type in Brit. Museum}; length of costa 95 ; antennae 

 and abdomen 34 ; thorax with head 24 ; width of abdomen 

 11 mm. 



2 . In Hewitson coll. : length of costa 96 ; underwing 

 63 ; width of upper wings 48 ; of lower wings 41 mm. 



2 . Dr. Fickert describes the expanse of wings in his 

 specimen as 185 mm. [That doubtless includes the width 

 of thorax.] Hab. Batchian. 



2 In collection of Dr Francis A. Walker, the origina. 

 of my figs. ; length of costa 108; hind wings 71 ; abdomen 

 and antennae 35; thorax 18; collar 3; head 3 ; width of upper 

 wings 55 ; lower wings 46 ; abdomen at widest 17 ; thorax 

 13 ; head 10 ; and collar 8mm. 



$ Figs, on Plate. Length of legs — 



1st pair ; femur 12, tibia 10, tarsi 16 mm. 



2nd ,, ,, 11, „ 13, ,, 19 >> 



3rd „ „ 10, „ 15, „ 21 ,, 



2 . Figs, on Plate. Length of legs — 



1st pair ; femur 14, tibia 12, tarsi 14 mm. 



2nd „ „ 13, „ 13. ,, 17 » 



3rd „ „ 14, „ 15, ,1 20 „ 



These do not include the"] trochanters or coxae which 

 average a little over a millimetre each. 



No. of joints of the antennae of both sexes from 58 to 64. 



The cilia from the abdominal fold are so long in the $ 

 that when the body is set below the interior margin, they 

 meet across the widest part. 



I am indebted to the kindness of Mr. F. J. Horniman, 

 F.R.G.S,, &c, for the opportunity of drawing the two 

 figs, of the $ of this species from a fine specimen in his 

 wonderful museum ; and I take this opportunity of 

 strongly commending the liberalty with which he renders 

 his treasures of use to the general public. I hope the 

 time will come when multitudes of private local museums 

 will be made by their owners a scource of instruction and 

 delight to the people, as well as to the specialist. Mr. 

 Horniman most worthily pioneers such a movement, 

 which I am sure there is a growing disposition amongst 

 many others to join in. I may be pardoned for saying 

 so much, as the need of such a public benefit has been 

 on my mind for many years. 



