252 Drv Arztiivs’s Ob/ervations on the Genus Paufuse 
is nearly truncated, and downwards infle&ed 5 butthat of P. micro- 
cephalus thews an appearance very different, its top being feemingly 
drawn out in the middle into a point, and its keel longitudinally 
fulcated, as if the lip were bipartite. Whether thefe appearances 
are optic illufions, or realities, or owing to the fubjacent maxillz, 
I do not pretend to determine. But fo much is certain, that, by 
repeated obfervations, I have not been able to difcover any fiffure in 
the middle tip of the labium, viewed in front. 
The Thorax, though very unlike in thefe fpecies as to many par- 
ticulars, is neverthelefs upon the whole of the fame fhape. It is 
narrower than the elytra, and uneven, confifting of two diftinét 
parts, the foremoft a little raifed all around, and the other not only 
lower, but alfo broader, and either depreffed or excavated in the 
middle, being otherwife nearly cylindraceous; and therefore the 
term attenuatus, ufed by Thunberg, feems not to be very appofite, 
though it may anfwer much better the defcription of his own 
fpecies. But even fuppofing that the thorax tapers towards the 
bafe, it would be the very reverfe of affenuatus as applied elfe- 
where. ; ji 
The Elytra are linear, almoft flat, fmooth, thin and flexile; the 
bafe, containing the {mall /cutelum, is not only much contraéted, 
but even narrower than the thorax; the exterior margins, bent 
down, cover a great deal of the abdomen; and the truncated ends 
are inflected behind; but to avoid a fold being neceffary in the 
outer angle on each fide, where the incurvated borders of the fides 
and the ends meet, the elytra are there cut out into minute finufes, 
the edges of which being a little raifed form as it were {mall oblong 
tubercles. 
The Abdomen is of the fame thicknefs throughout, and compofed 
of five fegments ; above, it is nearly flat, and of a light changeable 
ferruginous 
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