236 Bntisli Dj-agonjiies. 



of mask ; a row also near the outer margin of each 

 palpus, all but one being on the movable hook, which 

 is slender, sharp, and curved in at the point ; middle 

 lobe of mask produced in an obtuse angle, cleft in the 

 centre and serrated along margin ; palpi distinctly two- 

 branched, the inner being serrated along inner margin 

 and having an incurved hook at the tip ; the outer branch 

 with a sharp hook at the two corners and a small row 

 of serrations between ; the mask as a whole approaches 

 somewhat that of genus Calopteryx. Occiput appa- 

 rently rather narrow ; a little concave behind ; sides 

 sloping backwards ; hind corners rough with points. 

 Protliorax somewhat quadrilateral in shape, broader 

 behind ; Aleso-t/ionnic spiracle's visible, dark. TJiorax 

 with a few scattered rough points. Wing-cases short, 

 5"5mm., barely reaching the fourth segment. Legs 

 slender ; fore-legs, /•5mm. long, mid- 9-5 mm., hind- 

 12mm. ; lines of rough points along them ; a somewhat 

 distal dark ring on femora ; distal ends of femora, 

 tibiai, and tarsal joints dark. Abdomen^ fifth to ninth 

 segments with small, straight, lateral spines ; upper 

 surface with numerous dark points, very much closer 

 together in a raised ridge along middle of segments 

 9 and 10, which last has a ring of points on its hind- 

 margin ; a mid-dorsal pale line along the abdomen ; 

 sutures, except between 9 and 10, dark, and having a 

 still darker spot on each side (jf the pale line, and 

 another near the lateral margin. LanielUv very long, 

 nearly lomm. ; rounded at tip ; broadest near the base, 

 then more or less parallel ; middle one a trifle broader, 

 curved downwards at tip ; in colour much resembling 

 a thin lamina of tcjrtoise-shell, the dark blotches being 



