492 L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. [No. 3, 
pupa, suspended by a wliite median girth, is green with a yellow 
lateral streak and a very pointed head.” 
“ C. catilla is found only in the forest, the males on forest roads 
on wet spots together with Lycsenidee and Papilioninde, but they form 
the larger number of such congregations, and often occur in such large 
crowds that dog-cart horses get frightened on approaching one of these 
white spots on the road, which all at once flutters up into the air with 
an audible sound. If driven'away from these favourite spots, they fly 
rapidly in Indian file up and down the forest roads, and fall in again 
on the same spot when the danger is passed. G. catilla appears never 
to be a destructive insect as is 0. crocale at times. The antennae in 
both sexes are distinctly red. The male has on the underside of both 
wings at the termination of the discoidal cell some red spots, one in 
the forewing, two in the hind wing, the latter with silvery centres. 
The sexual tuft of hair is of a darker shade of yellow than in G. crocale , 
and the whole colouring of the underside is of a dull, silky, or leather¬ 
like gloss. There is also on the underside of the forewing a somewhat 
obscure reddish band, commencing near the apex of the wing, and 
extending towards the middle of the inner margin, ending on the 
second median nervule. G. catilla also has two forms of female:—I, 
the form figured by Distant on pi. xxv, fig. 15, which exhibits nu¬ 
merous varieties as regards the extent of the reddish-brown colour 
on the underside of both wings, there being all gradations from speci¬ 
mens with very little red to quite dark ones. II, the second form is 
on the upperside of both wings pale sulphur-yellow, and not dark 
yellow as in the first form, and the costal and marginal black spots 
on the upperside of both wings are not so distinct; on the underside 
there is never any reddish-brown colouring. This form is the rarer 
I have always obtained one of it to five of the other. I am 
entirely ignorant of the larva, pupa, and food-plant of G. catilla ; 
but as the larval stages of the two other Catopsilias occurring 
in Sumatra, G. pyranthe , Linnaeus, and 0. scylla , Linnaeus, which 
I know very well, differ only slightly from those of G. crocale , it 
may be anticipated that the early stages of G. catilla also possess the 
same characteristics. G. crocale , G. pyranthe, and G. scylla I have bred 
on different species of Cassia, so also G. catilla will probably be found 
some day in the larval stage feeding on a Cassia growing in the forest.” 
534. Catopsilia pyranthe, Linnaaus. 
Grose Smith. Snellen. Wallace. Hagen as pyranthe, philippina 
and chryseis. Distant as chryseis. The form of this species found in 
Sumatra has in both sexes on the upperside of the forewing a broad 
