P3074 
PHATE“ CCCCXEIX. 
LIBELLULA BIGUTTATA. 
BIMACULATED DRAGON FLY. 
NEUROPTERA. 
Mouth armed with jaws, more than two in number; lip trifid: an- 
tenn very thin, filiform, and fhorter than the thorax: wings ex- 
panded : tail of the male fiunifhed with a furcated procefs. 
SPECIFIC CHARACTER. 
LipELLULa ficuTTaTA. Abdomen deprefied and narrow; the 
firft joint marked in the middle with two fmall yel- 
lowith {pots. 
A fmall brood of this curious fpecies of Dragon fly was difcovered , 
about eight years ago in a marfhy ground at Hampftead, fince which 
time they have entirely difappeared. It is neither defcribed by Lin- 
nus 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 infeCt is flat, and rifing into a longitudinal 
ridge along the middle, but is confiderably narrower m proportion, and 
this circumftance is alone fufficient to prove that it is of a different 
fpecies. The pale yellowifh fpots on the firft joint of the abdomen at 
‘ye bafe is alfo a ftriking charaGter : two of thefe fpots are placed con- 
“guous to each other on the back, and two others appear one on each 
FQ _ fide, 
