" Libclliila. lOi 



Male Imago. 



Head, warm dark brown ; face and e}'es of much the 

 same colour. Thorax, dark brown, \'er}' hairy, two bhiish- 

 yellow longitudinal stripes on the mcsonotum. Legs 

 black, with the base of the femora brown. Wings, 

 hyaline, except for a dark brown patch at the base — 

 oblong on the fore-wings, triangular and of larger size 

 on the hind-wings ; the nervures on these patches 

 )-ellowish ; three rows of post-trigonal cells; about 15 

 ante-cubital nervures, about 12 post-cubital. Ptcrostigvia, 

 black, rather narrow, 4mm. long. Acccssoiy iitciiibrauc 

 rather large, white. Abdomen broad, much flattened, 

 powdered with bright blue in the adult ; yellow lateral 

 spots on segments 3, 4, 5, 6. Anal ap/^endages small, 

 black, the superior ones slightly toothed below, and 

 the inferior one \-ery slightly notched at the tip. 



Female Imago. 



The female differs from the male chiefl}- in possess- 

 ing a broader abdomen of a tawny colour ; the yellow 

 spots are brighter and larger, and are present on the 

 seventh segment, from which they are absent, or nearl\' 

 so, in the adult male ; segments 6, 7, 8, 9 are some- 

 what strongl}- outlined in black, and there is a rather 

 distinct mid-dorsal keel ; the anal a/'/'endages are \-er\' 

 short. The faee is of a }'ellowish-brown, and so lighter 

 than that of the male. 



Immature Colouring. 



When but lately emerged, in colour the male closeh' 

 resembles the female. The blue coloration — a kind of 

 bloom which may be rubbed off — does not appear 



