The Odoimhi or Drmjonflies of South Africa. '295 



Pi\)thorax light reddish brown, marked with bUick dorsally in the 

 middle and the sides, both parts indented posteriorly by reddish 

 brown. Posterior lobe divided into two pairs of processes ; the median 

 ones nearly a horizontal plane and slightly convergent with their 

 broadly rounded ends ; the lateral ones nearly vertical, somewhat 

 longer and narrower, their rounded ends slightly divergent ; medial 

 processes black, lateral ones reddish, black in their distal half in very 

 mature specimens. Thoracic dorsum light reddish brown lined with 

 black ; a line over the median suture and the ante-alar sinus ; a narrow, 

 ventrally incomjjlete line near the median suture ; an equally narrow, 

 complete line on the humeral suture. Sides black from the humeral 

 suture to half way towards the metastigma, this colour interrupted by 

 a narrow, cuneiform, ventrally incomplete reddish band near the 

 humeral suture and a round spot on the mesinfraepisternum ; sides 

 and ventral side otherwise light reddish brown, verj- slightly whitish 

 pruinose, a narrow black line on second lateral suture. Legs very 

 light reddish brown ; lines on first and second femora, rows of points 

 on third femora, internal side of tibiae, tarsi and spines black. 



Abdomen light greyish brown marked with black ; a transverse 

 dorsal line and lateral points near the posterior end of segment 2 ; on 

 3-6 terminal rings, slightly distant from the end and narrowing to a 

 complete mid-dorsal longitudinal band which is divided by a fine 

 median whitish line ; 7-10 reddish brown dorsally; this colour narrows 

 on 7, and is broader on 8-10 ; sides black, interrupted on 7 by a longi- 

 tudinal reddish line. Valvae black, not exceeding the abdominal end. 



Pterostigma slightly larger than in male, its colour lighter. Imma- 

 ture females are light yellowish brown to almost white ; all dark 

 markings are absent, except the thoracic lines (which are also reduced 

 in extent and less deep in colour), the lateral black of segments 8-10 

 and the terminal dorsal points on 3-6. First to appear are evidently 

 the transverse lines on head, last the longitudinal stripes on segments 

 3-6. Immature males are much like the females at the same stage, 

 their abdomen being almost pure white. 



^ , Ahd. 26, hdw. 19 mm. $ , 29, 19 to 30, ^t. 21. 



Vein A* is slightly variable ; most specimens are like Plate VII, fig. 

 9, viz. with A* very nearly parallel to the anal side of 9, ending in 

 the middle of the cross-vein which continues the distal side of 9 to 

 the wing's edge, or bent only very slightly towards the anal margin. 



■In some specimens this deflection is stronger, in one male to the 

 confluence of A* with the anal end of said cross-vein ; in one (other- 

 wise abnormal) the hind wing of a female A* reaches the anal margin 

 at one half the length of 9. 



