Dr. ArzeLrus’s Ob/ervations on ihe Genus Paufus. 255 
The Palpi are nearly of equal length, the anterior affixed to the 
back of the maxilla, and the pofterior to the middle. of the lip, the 
former confifting of four joints and the latter of three. Fabricius 
fays, that the palpi are filiform, and all their joints cylindrical, and 
of the fame fize. This may be true as to the hinder palpi, but it is 
not equally fo in regard to the foremoft, as thefe latter have the 
middle joints veficular and incraffated in the male, and obconical 
with the terminal one much larger in the female. 
The Mandibule are toothlefs and without fheaths. 
The Lip is cylindraceous, elongated, and contraéted where the 
palpi are inferted, and above them bifid. 
The Thorax is flat, but marked with no inequalities, being neither 
depreffed nor excavated. , 
The Era are rounded at the end, and neither bent down there, 
nor at the exterior margins. 
The Abdomen is furnithed on the fides with papillary folds. 
The Tarfi of the fore feet have five joints, but thofe of the hinder 
feet only four. 
| /Fhefe few remarks may be fufficient to fhew that Cerscoma is as 
different, a genus from Pau/us as can be fuppofed, and perhaps 
much more fo than many which Fabricius has eftablifhed. Having 
thus far fettled the generic character, I {hall now proceed to the 
hiftory and defcription of the {pecies in particular. 
1. Pausus microcephalus. 
This, Linné fays, “« was fent to him by Dr. Fothergill of London, * 
in a_colle¢tion of infects chiefly from North America and Guinea;” 
which in faét is nothing more than faying, that it may be a native 
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