Rev. L. Guitprne’s Account of Margarodes. 117 
under which some families of ants had established receptacles 
for their broods. Many lay near the surface, while others, 
buried at the depth of many inches, would require (even aided 
by their strong fossorious legs) the favourable opportunity of a 
shower to enable them to penetrate to the surface, and attack 
the congregated larve of the ant. Though armed with a noble 
microscope, I cannot satisfy myself as to the form of the foramen 
in the anterior claws, through which the liquid food is pumped, 
as in the mandibles of the larve of the Myrmeleonide. Ido not 
remember any other perfect insect in which the mouth is alto- 
gether wanting, and the food is absorbed by tubes ending in a 
foramen ; and it will probably be found necessary to constitute 
a new order for its reception. It is curious, too, that the tubes 
for feeding should be seated in the anterior /egs. It is well 
known that the raptorious legs of the Scolopendride are tubular, 
but this structure is only applied to the injection of the deaden- 
ing poison by which they kill or stupefy their prey. _ 
I once thought that the ground pearls were the ova of some 
insect ; but from the great diversity in their size and shape it was 
impossible to maintain this opinion: the ova of the same insect 
rarely differing in any very sensible degree. It was moreover 
easy to trace on the greater number of specimens, when cleaned, 
a rostriform projection (tab. 12. f. 5. a.), with several minute and 
obliterated spots, which seem to mark the position of the legs, or 
rather, perhaps, the spiracula of the larve: the anal portion of 
the pearl is also remarkable for five minute and regular spots, two 
placed in a line, and three (tad. 12. f.6.) smaller ones in a triangle 
between them. The pearl is irregular in its outline, the smaller 
specimens are roundish, while the larger ones are swollen on the 
sides, with the anal termination often bent upwards (tab.12. f.5.). 
The whole puparium is covered with large caducous scales, - 
which strongly effervesce and disappear in nitric and muria C 
