18 PLATE DXIIl. 
the fmalleft figure, exceeding one third of an inch, and including the 
antenne confiderably more: its form is peculiar, and the colours 
which are gay, in fome degree remarkable for their brilliancy. Its 
singularity confifts in the very curious form of the thorax, a kind of 
elongated cylinder, conneéting the head with the body, as if the 
former were placed on a flender pedicle; the thorax being narrower 
by one half than the head, and not above one third the breadth of 
the wing-cafes. Notwithftanding this difproportion of its parts, the 
appearance is not devoid of elegance, aud to this the beauty of its 
colours contribute materially. 
The head and thorax of this infeét are green and blue, changeable 
into each other, and highly gloffy: the contraft between the colours 
of thefe and the wing-cafes is firiking, the latter being fine orange, 
with the exception of a large common fpot of the fame fhining blue 
and green, as on the head and thorax, or rather inclining more to 
azure, that is, difpofed at the pofterior extremity. It is no lefs 
worthy of remark, that the lower furface is in like manner varied with 
blueifh fhinmg green, and orange, the head, thorax and pofterior part 
of the abdomen, being of the former colour, and the intervening 
fpace of the abdomen, orange. The antenne are orange from the 
bafe to the middle, beyond which they are dufky: the legs alfo are 
of two colours, the thigh and firft joint being orange, the remainder 
dufky ; and befides this the thighs are black at the tips. 
Gmelin defcribes this fpecies as a native of Upfal. In Britain 
it is a very local fpecies, but does not appear uncommon in the 
places it inhabits: it occurs abundantly in Cromllyn bog, in Gla- 
morgauflire, near Swanfea, and alfo in a bog near Norwich. 
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