Dr, Arze ius’s Odfervations on the Genus Paufus. 253 
ferruginous colour, looking as if pellucid, and the pofterior margin 
of the laft fegment but one as if raifed above the terminal, which 
is dark-coloured, very large and bent down, being behind circular 
and marginated ; underneath, and on its fore-part, the abdomen is 
marked with a little convex plat fituated between the fecond and 
third pair of feet, and further towards the end it is gibbous, the 
firft and the fourth of the fegments being much broader than the 
others, and the cavity under the thighs of the hinder feet ‘fur- 
rounded by a circle of very minute and approximated dots. In the 
fpecimens of P. microcephalus which Ihave had to examine, this ca- 
vity being covered by the thighs, and the upper part of the abdomen 
by the elytra, I can fee only very few of the dots; nor am I able 
to afcertain whether the whole back of the abdomen is as light- 
coloured as that of P. /pherocerus, 
The Feet are all nearly of an equal length, the two firft being 
inferted in the fore-part of the thorax, or rather of the breaft; the 
two fecond in the bafe of the venter at the top or contracted end 
of the little plat above mentioned; and the two lait in the middle 
of the venter. The /highs are thicker than the legs, particularly 
thofe of the hinder feet; they are without hairs or {pines, of an 
oblong fhape, but more contracted at the bafe, and compreffed, 
though at the fame time gibbous on both fides; they are moveable 
in a tranfverfe direction by aid of a light-coloured appendage, 
which being attached to their bafe within, rolls im a focket below, 
and which on the hinder feet is very large, oval, and comprefled to 
an obtufe edge, but on all the other feet it refembles more a tuber- 
cle, being almoft round; the thighs are laftly cut out at the top, 
and their inner margins a little beyond the middle, for the inward. 
motion and contraétion of the /egs, which alio are compreffed but 
not gibbous, and on the edges more or lefs furnifhed with fhort 
hairs, 
