1/2 British Drago}iflies. 



the very broad black line in front of vertex and eyes. 

 Top of vertex yellow. Eyes blue, in contact a moderate 

 distance ; behind eyes a small yellow triangle. ProtJiorax 

 black, with yellowish hairs behind. Thorax hairy, brown 

 above, with two yellow longitudinal lines narrowing 

 posteriorly, and contracted just before the posterior end ; 

 sides of thorax yellow, with three oblique black lines ; 

 points at the attachments (jf the wings and the pro- 

 jections between them yellow. Legs black. Wings 

 hyaline, anal angle of hind ones bluntly pointed ; costal 

 margin yellowish, and a few of the transverse nervures 

 near it }-ellow also ; other nervures black. Pterostigjua 

 4mm. long, ver}' narrow, yellow-brown. Aeeessory 

 membrane rather small, A\hite. Abdomen hairy, but little 

 swollen at first and second segments, or constricted at 

 third, ground colour black ; first segment black dorsall)-, 

 yellow at the sides ; second, on dorsal surface a small, 

 basal, central, }'ellow spot, a transverse yellow streak 

 across middle of segment interrupted mid-dorsally, two 

 posterior dorsal bluish spots, sides yellow and blue, 

 auricled ; third to eighth segments, sides with an inter- 

 rupted blue line, dorsal surface with two posterior blue 

 spots, and a transverse }^ellow anterior streak interrupted 

 by the mid-dorsal carina ; segments 9 and 10 without 

 the yellow streak. Anal appendages, superior, long, 

 slender, twisted, ]:)ointed, a projection on the upper 

 surface near the extremit}^ a line of hairs internall}' ; 

 lower, short, slightly bifid. 



Female Imago. 



Face brownish-yellow. On front of meso-thorax two 

 spots instead of lines. Wings very pale yellowish, darker 



