44.0 Lieut.-Colonel N. Manders on the 
beautiful butterfly in Mauritius, the brilliant sapphire-blue 
of the freshly emerged male being exquisite. I have 
noticed dozens at a time on the steep hill-side at Port 
Louis leading up to the Citadel. It has the habits of our 
small Tortoiseshell, and its gorgeous colouring can easily 
be watched and admired. Pairing takes place in the 
hottest sunshine, all the females being freshly emerged. 
It was introduced into the island about the year 1857 or 
1858, and soon established itself (Trimen). ‘The species 
is very constant on the upper wings, though the female 
is slightly prone to vary in the amount of blue, which is 
sometimes partially replaced by fuscous ; but on the under 
surface it varies much in accordance with the climate, the 
under surface of those from the Black River district on the 
western portion of the island which is very dry, have all 
the markings indistinct and blurred, and the ground colour 
varying shades of grey. 
Flies I—VI, abundant; VII—IX, scarce; X—XII, 
common. 
Bourson. The same remarks apply generally. Vinson, 
1891, says “that it is a recent importation due to chance.” 
It would appear to have been introduced some thirty years 
later than into Mauritius, and this may be due to more 
irregular and infrequent communication with the outside 
world in the case of Bourbon. The larva feeds on Barleria, 
and is well figured and described by Vinson (“ Etudes 
d’Ent.” Oberthiir, 1888). 
Salamis augustina, Boisd. (Pl. X XIX, fig. 3). 
13. Junonia Augustina, Boisd. 
This butterfly is one of exceptional interest, as it is 
almost certainly extinct, no specimen having been taken 
for twelve years. So far as I can ascertain from extensive 
inquiries in this country and abroad, there are only two 
specimens extant; one in Mr. Trimen’s collection given to 
him in the year 1865 by the late Mr. Colville Barclay 
taken in the Moka district and the other, here figured, in 
the Port Louis Museum. It is well therefore to put on 
record all that I have learnt regarding the latest captures 
of this rare insect. It was getting very scarce when Mr. 
Trimen was in the island in 1865, and it is strange that 
an insect whose larva feeds on the sugar-cane which covers 
the greater portion of Mauritius should not rather be over- 
