The OAonata or Dragonjlies of South Africa. 423 



costal and proximal half brown in longitudinal, ochreous to whitish in 

 cross-veins ; base of second pair with a golden-yellow to light golden- 

 brown spot ; vestiges in c, sc and m, almost to Cuq in cu, to apex of 

 membrauiile. Pterostignia light ochreous in dorsal, whitish in ventral 

 side of wings, between thin black veins, smaller than in two preceding 

 species. 8^ to 91 Anq. Abd. 30, hdw. 30, pt. 25 mm. . T. a-ureola. 



Females. 



1. Frontal furrow moderately deep, vertex obtuse or very shallowly emarginate. 



Legs blackish, tibia coucolorous ........ 2. 



Frontal furrow very deep, vertex two-jjointed. Wings hyaline ; golden- 

 yellow basal spot in hind wings to Anq 1 and Cuq ; small round yellow 

 cloud between ^3 and anal angle ; pterostigma very small, blackish and 

 narrowly ochreous at both ends in dorsal, blackish with anal margin 

 ochreous in ventral surface of wing. Venation ferruginous to nodal 

 region, gradually darker more distally. S^-IOJ Anq. Lips, face and 

 frons whitish yellow, frons diffusely darker at base. Thoracic dorsum 

 olivaceous, an indistinct cuneiform stripe at median suture and broad 

 band at humeral suture ferruginous. Sides olivaceous ; incomplete 

 dark lines at humeral sutvire, on niesepimeron, at metastigma and on 

 second lateral suture ; tliese lines rather diffuse, the stigmatic one alone 

 being distinct and blackish. Abdomen comparatively robust, very gradu- 

 ally narrowed to apex ; dull ochreous brown ; very narrow black lines on 

 carinae ; black mid-dorsal baud on segments 8-9 ; in some specimens an 

 almost complete narrow blackish line between lateral and mid-dorsal 

 carinae on segments 3-9. Third femora black with narrow external 

 ochreous line ; second and first femora ochreous, black internally. Abd. 

 20, hdw. 23, x>t. < 2 mm. to 23, 28, 2 . . . . T. Kirbyi ardois. 



2. Colour of abdomen predominantly light, ochreous to reddish brown . 3. 



Colour of abdomen predominantly black, light yellow lateral stripes (>. 



3. A distinct mid-dorsal black line on abdominal segments 2-10, or, if there is 



no such line, lateral black margins also absent 4. 



Mid-dorsal black line only on segments 2-3, sometimes 4, absent on 

 segments 5-7 ; sides of segments 4-7 broadly black, this colour ascending 

 almost to mid-dorsal line at terminal joint of each segment ; 8 black 

 with small ochreous latero-basal spots ; 9-10 wholly black. Abdomen 

 comparatively slender, though more robust than in corresponding male. 

 Face, frons and vertex ochreous ; narrow black basal line on frons. 

 Thorax light golden brown dorsally ■, sides light greenish yellow, with 

 the ordinary black lines of tlie genus rather narrow and not often con- 

 fluent. Wings hyaline ; basal spot golden yellow, pi-edominantly small, 

 only vestiges in front wing and not exceeding Anq 1, half way between 

 Cuq and i and a^jex of membranule in hind wing ; not rarely a light 

 yellow cloud in region of nodus. Pterostigma conspicuously larger than 

 in corresponding male, very dark ferruginous to blackish, often lighter 

 at anal margin. Venation dark ferruginous to nodal region. lli-12j 

 Anq. Abd. 2i, hdw. 28, pt. <^ 3 mm T. arteriosa. 



