The Odonaia or Dnnjonjiies of South Africa. 421 



Males. 



1. Colour predominantly red .......... 2. 



Colour predominantly black, markings light yeUovvish . . 6. 



2. Abdomen little widened at base, not sensibly contracted in third segment, 



triquetral and very gradually narrowed to apex . . . .3. 



Abdomen little widened at base, contracted at third segment, very 

 slender and slightly fusiform hindward. Pterostigma small, very dark 

 ferruginous to almost black ; neuration close, 114-12^ Anq ; veins red 

 distally to pterostigma. Variable deep golden-yellow spot at base of 

 both wings; smaller spots to Anq, and Cuq in front wing to^ngr,, Cttg or 

 very little beyond and apex of membranule, or little more in hind wing ; 

 larger spots to Anq., and arcuh\s in front wing to Anq^-^, proximal or 

 even distal end of ( and anal angle in hind wing. Face dull ferruginous, 

 frons above coppery red. Thorax reddish golden brown ; black stripes on 

 mesepimeron, at metastigma and at second lateral suture, dorsally 

 incomplete and partially confluent to form a longitudinal stripe. 

 Abdomen blood red ; blackish lateral stripe at mid-height of segments 

 1-3, sides of segments 4-8 deep black, 9-10 wholly black. Legs black. 

 Abd. 23, hrhc. '25, pt. < 2 mm. to 26, 30, 25 ... T. arteriosa. 



3. Furrow of frons moderately deep ; vertex broadly emarginate. Triangles of 



hind wings free, regularly but one Cuq in hind wings ; pterostigma 

 medium-sized ........... i. 



Furrow of frons deep ; vertex triangularly excised, two-pointed. Triangles 

 of hind wings very often crossed, not rarely 2 Cuq in hind wings. 

 Pterostigma very small ; black, narrowly red at both ends on dorsal side, 

 deep ferruginous on ventral side of wing. Base of both wings deep and 

 brilliant golden yellow to about two cells beyond ( in front wing, 3-4 

 cells beyond t in hind wing, part of c and m lighter in colour to almost 

 hyaline. Neuration red to a little beyond level of nodus. Face 

 olivaceous ; frons scarlet red, narrowly yellowish at base and at sides. 

 Thorax reddish golden brown dorsally, turning to olivaceous at the sides, 

 with vestiges of black lines. Abdomen brilliant scarlet red, narrow 

 black mid-dorsal line on segments 8 9. Legs brown, tibiae externally 

 light ferruginous or red. Abd. 20, hdw. 23, jif. 15 mm. to 22, 26, 15. 



T. Kirbyi ardens. 



4. Pterostigma blackish with a narrow ochreous line at anal margin. Venation 



yellowish red to nodus, blackish more distally. lOJ to 11^ Anq. Base 

 of front wings light golden yellow to Anq^ and Cuq, of hind wings 

 deeper golden yellow to Anq^, proximal side of t and anal angle. Face 

 olivaceous ; frons and vertex dull orange with no metallic colour, a 

 narrow blackish line at base of frons. Thorax reddish golden brown, 

 sides with vestiges of blackish lines. Abdomen dull blood red ; lateral 

 carinae very narrowly lined with black to segment 7, this black line 

 broader on segment 8, and especially on 9 and 10 ; black mid-dorsal line 

 on segments 8-9. Legs black. Abd. 24, hdw. 28, pt. 2'5 mm. T. pluvialis. 

 Pterostigma ochreous to very light ferruginous between black veins 

 Venation bright red to pterostigma. 95 to lO-i Anq. Variable golden- 

 yellow brown spot at base of wings ; in average specimens half way to 



27 



