Dr. Arzeuivus’s Obfervations on the Genus Panfus. 2st 
5 
compreffed, narrower towards the top and, blunt, and feem to have 
neither joints nor motion, nor the fame ftructuare as the others, 
being minutely punctated.,. Whether or, not they internally adhere 
to the maxilla, is impoffible for me; to decide; but, certain it is, 
that if they do, it cannot be to. any other part than their very 
bafes, 
The Mandibula, alfo inferted in the jugular mah line, between 
the exterior palpi and the anterior angle of the eye-focket, extended 
to the middle of the under-joint of ee antenne, .and, moving)on 
two hinges below, are upon the whole arched, acuminated, and forci- 
pated+ but, to {peak more particularly, they confift of three different 
parts, viz. two horny cafes or {heaths, the inferior of which is the 
largeft and almoft ftraight ; the fuperior narrower, fhorter,. and 
bending inwards 5. and from the top of this there comes out a; fill 
narrower round and flefhy hook, which meets that. of the other 
mandibula, and {eems to be a true inftrument for feeling. The. 
ftructure of the lowermoft fheath being the broadeft, and the other 
broader than the hook, makes the mandibulz appear as drawn out 
below on the infide, and as if furnifhed with two teeth, the inferior 
of which is covered with {mall hairs. 
The Manilla being hidden by the mandibulz, the exterior palpi 
and the labium, I cannot fee any thing of them but their very 
tops, which are extended above the lip, or between it and the 
mandibulz, and appear to be arched, horny, cylindrical, toothlefs, 
fharp- pointed and forcipated. 
‘The Ladium is rather large, thin and membranaceous, of equal 
length and breadth, longitudinally raifed in the middle, entire at the 
top, and there furnifhed with hairs. It is befides fhorter than the 
interior palpi, and often covered by them, which then are placed 
one on each fide of the longitudinal carina. That of P. /(pheracerus 
Kka2 is 
