[ $5 ] 
Pap AT Bi COCO, 
LIBELLULA BIGUTTATA.. 
BIMACULATED DRAGON FLY, 
NEUROPTERA. 
Mouth armed with j Jaws, more than two in number; lip trifid: an- 
tenn very thin, filiform, and fhorter than the agne wings ex- 
panded : tail of the male furnifhed with a furcated procels. 
SPECIFIC CHARACTER. 
LipeLLuLa Bicgurrata. Abdomen depreffed and narrow; the 
firft joint marked in the middle with two {mall yel- 
lowith fpots. 
A {mall brood of this curious fpecies of Dragon fly was difcovered 
about eight years ago m a marfhy ground at Hampftead, fince which 
time they have entirely difappeared. It is neither defcribed by Lin- 
neus or Fabricius, nor by any other writer we are acquainted with. 
Thisnew fpecies isallied inits general afpeét to the Libellula deprefia: 
the abdomen as in that infeét is flat, and rifing into a longitudinal 
ridge along the middle, but is confiderably narrower in proportion, and 
this circumftance is alone fufficient to prove that it is of a different 
{fpecies. The pale yellowith {pots on the firft joint of the abdomen at 
the bafe is alfo a ftriking character : two of thefe fpots are placed con- 
oo to each other on the back, and two others appear one on each 
FQ fide, 
