222 
Mrs. T. Vernon Wollaston on 
front by a straight basal line. The third, sixth, and last 
segments are each furnished with a pair of conspicuous dark 
retractile horns, the anterior pair of which are almost twice 
the length of the others. When fully fed it suspends itself 
by its tail, and turns into an obtuse semitransparent chrysalis, 
beautifully marked with small golden spots, placed elliptically 
round the head, and with a black, raised, semicircular line 
near the tail, the posterior edge of which is of a brilliant 
gold; there is also a minute golden spot about the posi¬ 
tion of the centre of the enclosed wings. These golden 
markings, however, disappear, by the absorption of the fluids, 
as the enclosed insect approaches maturity. 
Genus 2. Hypolimnas, Hiibn. 
Hypolimnas bolina , Linn. 
The female of this species might well be mistaken for 
Danais chrysippus , it being at first sight so exceedingly like 
that insect; but the different veining of the wings and the 
absence of the articulations of the fore tarsi are in themselves 
sufficient to show, upon closer examination, that it belongs, in 
reality, to what many authors regard as a distinct subfamily 
of the Nymphalidse. 
This handsome butterfly is not uncommon in various parts 
of the island, both at low and intermediate altitudes. My 
specimens I captured chiefly at Plantation, flying over the 
flowers of the Acacia longifolia , Willd. (known as the “ Port- 
Jackson Willow ”), on the grassy slopes behind the house; 
but I do not recollect seeing it at a higher level. Unfortu¬ 
nately I did not succeed in detecting either the larva or pupa 
of II. bolina. It appears to be tolerably abundant in many 
districts of North-western India, where the caterpillar is 
said to be reared on the Portulaca oleracea-, and, according to 
Captain H. L. De la Chaumette, it is very common, through¬ 
out nearly the whole year, at Saugor. Mr. R. Trimen, in 
his “Notes on the Butterflies of the Mauritius,” whence he 
records this species, remarks that “ it is very interesting to 
observe how this insect, the female of which so precisely imi¬ 
tates the Danais chrysippus , almost rivals its model in geo¬ 
graphical range, though it does not appear as yet to have 
extended into Southern Europe. Its occurrence in parts of 
the New World, where the chrysippus is unknown, seems to 
be regarded by many Lepidopterists as accidental—among 
others, by Mr. Bates (Proc. Zook Soc., Nov. 1863), whose 
laborious researches for eleven years in South America give 
great weight to his opinion.” It is found also in the Island 
