The Odonata or Dracjonflles of South Africa. 263 



length, the median branch terminating in a point at two-thirds of its 

 height. Sides yellowish (or reddish in life ?j ; a rather broad and 

 almost complete black mesepimeral band ; a narrow black line in the 

 dorsal third of the first lateral suture ; a broader black line on the 

 second lateral suture for its entire length. Ventral surface yellowish 

 with very narrow black lines on the sutui-es. Femora black ; tibiae 

 foliaceous, lanceolate, bright scarlet red on the outer, pure white on 

 the inner surface ; tarsi black. 



Abdomen short, depressed, not much narrower than the thorax at 

 the base, very gradually narrowing to the end. Dorsum light blue 

 (often badly discoloured in dead specimens) ; sides of segments 1 to 3 

 crimson ; ventral side of 1 to 3 crimson with a blackish hue, 4 to 10 

 blackish. 



Fia. 6. — Libellago caligaia. ^. M'Fongosi. A ijpeudages, right side and 

 dorsal view. 



Black markings on dorsum : Segment 1 a triangular dorsal spot ; 



2 a longitudinal dorsal line and an incomplete transverse line near the 

 segment's end, a latero- ventral somewhat diffuse longitudinal baud; 



3 a U-shaped dorsal marking, a narrow medial dorsal line and an 

 almost complete latero ventral longitudinal band ; 4 narrow nearly 

 rectangular transverse apical spots ; 5-6 the trace of a transverse ante- 

 apical line ; 7-10 wholly blue. Appendages deep black (Text-fig. 0). 



Wings hyaline; a yellowish tint of the base gradually vanishing 

 towards the quadrilateral. Pterostigma blackish at the ends, dark 

 reddish brown in the centre. Venation (Plate VI, fig. 6). 



Teneral males ai-e much like females in colour and pattern of head 



and thorax ; dull grey or violet on the dorsum ; yellowish on the sides 



of segments 1-3 of abdomen. Their dilated tibiae show various tints 



of pale yellow on the inner, of yellow or orange on the outer side. 



V . Labium whitish yellow. Labrum yellow, rather broadly bl.ick 



