384 Mr. C. O. FarfWharson’s Five Years’ Observations 
thrust out through an orifice. It is rather a diverticulum 
of the epidermis (though other layers may be involved) 
which is invaginated and exserted alternately. It is crowned 
by minute “‘ tentacles,” which so far as I can make out are 
not distinct hairs but are produced by a lobing of the upper 
part of the tubercle. I could not actually detect any 
orifice, these tentacles being so numerous. Very likely 
their structure has all been written up, but it may interest 
you to get this impression of a study of the living larva. 
[ am a poor artist, but I'll try to express my meaning 
in a rough sketch. The invagination appeared to me to 
be aptly comparable to the effect produced by one in 
turning a stocking inside out (the initial stage) or a glove 
finger. 
I am afraid my sketches are hopeless, but when the 
tubercle is completely retracted the position of the tubercle 
shows a slight pit with a “ pursed” centre. Looking down 
on the point by reflected light it had a curious resemblance 
to a starch grain under high magnification, rather lke 
this [sketch]. The extrusion of the tubercles was rather 
spasmodic. I could not, of course, study it with an 
Oecophylla in situ, for freedom was more attractive to the 
ant than the Guenée gland. Sometimes the tubercles 
would continue invaginating and being extruded rapidly 
for a short space of time and then stop, to be resumed after 
a bit. I hope to study the movements more in the next 
few days. 
March 1, 1917.—One of my Pterocarpus Lycaenid larvae 
pupated to-day. Another was on the way, and I was 
wondering why it didn’t, when I noticed an “injury” 
just behind the head on the dorsal surface. I soon dis- 
covered the cause, for a wretched Tachinid puparium 
was lying in the tin and I very nearly overlooked it. It 
has struck me that this particular Tachinid has made an 
unlucky or at least risky selection of a host; for the tree 
always overhangs the river completely, and if the emerging 
larva is unable to freeze on to anything it would stand a 
mighty chance of a watery grave. The Lycaenid itself 
might have done better, for the inflorescences appear 
to provide food for two or three moths, a beetle, Psylids 
and possibly other things, and can’t possibly mature 
many fruits. So hopelessly damaged are some of the 
flower-heads that what is left is almost sure to drop off 
into the water. I haven’t seen the Lycaenid pupae in 
