EXTERNAL ANATOMY OF INSECTS. 469 
outer base of the anélia is another small immoveable 
piece, resembling a flattened tubercle, the end of which 
is internally hairy or scaly: these pieces appear to repre- 
sent the mandibles*. Near the base of each half of the 
antlia, just below a sinus, may be distinctly seen the mi- 
nute, usually biarticulate rudiment of a mavillary pal- 
pus”; demonstrating to a certainty that these spiral or- 
gans, at least their lateral tubes or Solenaria, are real 
maxillee*. The rudiment of the under-lip (Labium) is 
the almost horny triangular piece united by membrane 
to the two stalks of the maxilla, and ‘supporting at its 
base the recurved labial palpi; which are so well known 
that I need not enlarge upon them*. Amongst these 
parts there seems at first sight no representative of the 
tongue ; but M. Latreille has advanced some very inge- 
nious, and I think satisfactory arguments *, which go to 
prove that this part, at least the tongue of Hymenoptera, 
has its analogue in the intermediate tube or Fistula 
formed by the union of the two maxilla, and which con- 
veys the fluid aliment of this Order to the pharynx. As 
in Diptera the maxille sometimes merge in the labium, 
so here the tongue (as it were divided longitudinally) 
merges in the mazilla. He further observes, that in a 
transverse section of the maxilla of the death’s-head 
hawk-moth (Acherontia Atropos), the lateral tube ap- 
peared to be divided into two by a membranous partition, 
and to contain in the upper cavity a small cylindrical 
* Savigny i. Prats VI. Fie. 13. c!. 
® Ibid. Fic. 13.h". Savigny di supr. o. 
© Prare VI. Fie. 13. d!. Savigny udi supr. t. 1—3. 0, 
4 Ibid. 6. Prare VI. Fic. 13. b’, - 
* N. Dict. d Hist. Nat. xvii, 467. 
