584 
CYRESTIS. By H. Fruhstorfer. 
bougain- 
villci. 
tabula. 
size. The forewing has the apex more blunt, the outlines more straight and less excavated. The meridional 
stripes are very fine and straight ; the first one splits near the costa into two branches enclosing a triangle of 
sky-blue colour. The line in the submarginal band is deeper blue than in achates. On the hindwing the first 
meridional stripe ends at the median vein, being apparently continued by the blackish first median nervule. 
On both wings the submarginal band is very straight and regular, its bordering line on the forewing interrupted 
between the second median and lower radial. The very dark apex which is less richly marked than in achates, 
is adorned by a small, clear white spot. Above the yellow spot at the anal angle of the fore wing we find in the 
submarginal band the C of thyodamas and nais, which is absent in achates. The outer border of the hindwing 
displays more of the white ground-colour and is only marked with one very fine marginal line, whereas 
achates has two. Also the under surface greatly differs from that of achates in that the submarginal band is 
more black, the meridional stripes more faded, and the apex of the forewing nearly entirely black and almost 
devoid of lighter markings; on the hindwing the yellow markings are less profuse than in achates ; the $$ are 
much larger, varying from light yellow to pale brown-yellow. 
C. bougainvillei Ribhe from the Solomon Islands, Bougainville (west-coast), Guadalcanal’ and Ysabel. 
The type of this rare species is in the Tring Museum. Upper surface: Ground-colour white, both wings are 
traversed by three meridional stripes, the two inner of which are much heavier and toward the costa of the fore- 
wing bifurcate. The interspaces between the prongs formed by the inner meridional stripe, and between the latter 
and a short black basal stripe, are shaded with blue-grey down to the median vein. The costal margin displays 
at its basal end a short, brown-yellow streak. The middle meridional stripe encloses the black lines closing 
the cell, between it and the first meridional stripe there remains a conspicuous, wedge-shaped rest of the white 
ground-colour, clear white above the median, but below it shaded with white-gray down to the inner margin. 
This clear white, wedge-shaped spot above the median is characteristic of this species and not found in adaemon ; 
in the uncoloured figure in “Iris” it does not appear very clearly. The outer, much finer, meridional stripe follows 
about the middle of the broad median band formed by the white ground-colour; presenting on the forewing a 
convex outward curve, it is quite straight on the hindwing, whereas in adaemon it is much thinner and on the 
forewing slightly undulate. The submarginal band displays on the hindwing 6 quite distinct links of the 
chain-pattern, on the forewing a yellow, basally eccentric, spot containing two white and black pupils; proxi- 
mally it is margined by a broad, black, continuous line, and has between the first median and lower radial the 
ground-colour divided by the black veins into three separate patches. Above the yellow patch we observe a jet- 
black, ocellus-like spot, proximally bordered by a very narrow, blue-gray crescent and distally flanked by the 
lower of the three described patches of the ground-colour. Also in the apical portion the band is adorned with 
two ocelli-shaped spots which are proximally bordered by a broad, black, and a narrow, pale blue crescent and 
distally marked with white; the spot located nearest the costa is the larger and more distinct. Both wings 
have one marginal and two submarginal lines of black. On the hindwing the anal region and anal projection 
are marked with dark orange-brown and dotted with whitish, violet and black, not unlike thyodamas , whereas 
adaemon is marked like irmae. The under surface resembles the upper surface, only it lacks the pale blue mark¬ 
ings, and has the broad, black spot on the anal projection more distinct. 
The two following are rather isolated species of aberrative colouring, which can neither be subordinated to any 
group nor be placed in connection with one another. But as they represent an excellent transition from the white to 
the brown species, we enumerate them here. 
C. tabula Nicev. (121 f) from the Nicobar Islands (Great Nicobar) is exceedingly rare, only a few 
specimens being found in European collections; I only saw 2 in Staudinger’s collection, and another 
is in the Fruhstorfer collection, all three of which were personally labelled by de Niceville. But neither 
the Tring Museum nor the British Museum possess it, and it is doubtful whether any other collections on the 
continent contain it. This great scarcity is easily understood, if one considers how little opportunity there exists for 
visiting the Nicobars, where the climate no less than the natives make a longer visit almost impossible. As 
there are no houses to be found where a collector might find shelter, it would be necessary to make use of the 
British government-steamers which from time to time, although rarely enough, come over from the Andaman 
Islands, and even these would, on account of the shortness of their stay at the various stations, afford but a poor 
chance for collecting. As the Nicobars belonged, during the 18th century and again from 1846—56, to 
Denmark which established there a few settlements, it might be possible that a few specimens of tabula 
be found in Danish collections. The various scientific expeditions that visited those islands, f. i. the Danish 
ship Galathea (1847) and the Austrian ship Novara (1858), have not observed the species, which was 
discovered in 1882 by Mr. von Roepstorff, a Dane, who discovered also andanianica of the thyo- 
damas- group, and avIio was employed in the convict-settlements at Port Blair in the Andaman Islands, where 
he was finally murdered. De Niceville gives an exact description which is found also in his handbook, 
