250 Dr. Arzexius’s Obfervations on the Genus Paufus. 
confequence of which is, that I, am better acquainted .with 
P. /pherocerus than with the other... The mouth, however, of both 
fpecies, and the various parts belonging to it,.I have, been obliged 
to examine. in their, unfeparated ftate, and.J \have. been therefore 
unable to avoid all miftakes, as the innermoft are more or lefs con- 
cealed by the exterior ones. But I muft confefs that even thefe 
latter, which I can, plainly fee through a compound microfcope,.do 
not appear to me exa¢tly fuch as Fabricius will have, them to bez. 
I fhall defcribe them all as I have found them. 
The Palpi are four in number, and feem all to arife from the 
crofs-line between the eyes, or the bafe of the jugular triangle before 
mentioned. The two placcd in the middle and farther in, and 
perhaps alfo a little higher up, are three times. as long as the others, 
at the bottom nearly approximate but afterwards diverging, flat 
within and, convex without, moving ontwo {mall tubercles at the bafe, 
above which they are firft contracted, and fo more or lefs widened. 
They may alfo, although my obfervations have not fatisfied me on 
the fubject, be in fome way or other attached to, the lowermof and 
external part of the labium. In thofe of P. microcephalus 1 can- 
not find the leaft veftige of articulation except the bafe-hinges; 
but thofe of P. herocerus {eem to be jointed all along, though I 
cannot afcertain it as a faét, not being able to make out any 
number of joints, feven with the greateft magnifying power which 
Ihave ufed. Thefe; palpi would probably be called poferiores or 
pofici by Fabricius,.but the appellation of smferiores appears to me 
much more fuitable. The. other two, which he perhaps would 
name anteriores or antici,-anf{wer every .defcription|of being ex- 
teriores, for they are not-only placed on the outfide, of the interior 
ones, and clofe to them, but alfo on the outer margin of the often 
mentioned guttural crofs-bar. eos are, befides, very {mall, ereét, 
comprefied, 
