NOTES. 71 
NOTES. 
Microdon, sp.—Several larvee of this genus of Syrphide were 
found on HLugenia sp., in a nest of the ant Cremastogaster sp., 
along with a colony of Lecanium psidii, Gr. Except for their 
peculiar colour—they are bluish-green—and for the fact that 
they may be seen moving about, one might mistake them 
for a species of Lecanium. They are slightly convex, are 
surrounded by a fringe, and in a position corresponding to that 
of the anal plates of a Lecanium is a dark brown, conical process. 
Each larva is about 5 mm. by 4 mm., oval, broadly rounded 
posteriorly, and narrower anteriorly. The head is usually 
retracted underneath the prothorax. When protruded it is 
seen to bear a forked process, each fork bearing two or three 
stout sete at the apex. When treated with KOH and mounted 
in Canada balsam the following details can be made out. 
The body is studded with circular glands. The fringe is seen 
to consist of a series of long feather-like processes, and shorter, 
more hyaline processes arranged alternately ; these arise from 
the crenulated margin of the body. The margin of the 
(stigmatic ?) process that corresponds in position to the anal 
plates of a Lecaniid is crenulate, the convexities of the 
crenulations being towards the centre of the process. The 
cephalic process ends in two finger-like bodies, one of which 
suddenly narrows about its middle length and bears a small 
spine at that point. The mandibles are large. Each is oval, 
and bears on its proximal half large, triangular, backwardly- 
pointing teeth, and on its distal half much smaller teeth. 
I am unable to say on what they were feeding. The 
character of the mandibles suggests that it might be the scales. 
One cannot imagine them catching the ants! In confinement 
they refused to feed, and died. 
In the Records of the Indian Museum, Vol. II., Pt. L., 
Brunetti describes under the name of Microdon auricinctus an 
insect taken in Kandy in October, 1907. 
Ceroplatus quadripunctatus, Brun. (Mycetophilide)—The 
larva of this fly was found feeding on the hymenium of a 

