422 Annals of the South African Museum. 



Anq l and Ouq in front wing to Anq.,, proximal side of t and anal angle 

 in hind wing. Face and frons anteriorly reddish ochreous. Prons above 

 and vertex brilliant metallic reddish violet. Thorax reddish brown, 

 lighter at sides, with a pattern of confluent brown or blackish stripes as 

 described for arteriosa. Abdomen dull blood red, sides of segments 1-3 

 yellowish, with an indistinct longitudinal blackish stripe ; lateral carinae 

 very narrowly black ; broad mid -dorsal black band on segments 8-9. 

 Legs black, first and second femora brown. Mature specimens faintly 

 violaceoiis by very slight bluish pruinosity. Abel. 22, hdw. 26,pt.2'5 mm. 

 to 24, 30, 2 5 T. annulata. 



5. Abdomen little widened at base, contracted at third segment, very slender 



and slightly fusiform hindward ; yellow markings on abdomen persistent 



in mature specimens . 6. 



Abdomen little widened at base, not sensibly contracted at third segment, 

 triquetral and very gradually narrowed to apex. Wings hyaline, vena- 

 tion black ; base of hind wings hyaline, or with a very small yellow spot, 

 not beyond Anq\ and Cuq and at most one cell at membranule. Ptero- 

 stigma broad, black, in most specimens with a narrow light yellowish 

 line at anal margin. 10 j to 13 Anq. Labium yellow with broad median 

 black band. Labrum and postclypeus black ; anteclypeus and anterior 

 margin of frons olivaceous ; frons above and vertex brilliant metallic 

 violet blue Thorax and abdomen very dark brown to black, made faintly 

 violaceous by thin bluish pruinosity. Legs black. Abd. 24, hdw. 29, 

 pt. 3 mm. to 26, 32, 3 .... T. Distanti. 



6. Prons above brilliant metallic blue, pure, or with a greenish shade. Labium 



yellow with broad median black baud. Labrum black with two yellow 

 spots. Pace and frons anteriorly light yellow. Thorax in mature 

 specimens very densely light blue pruiiiose ; in immature specimens with 

 a pattern of black and light yellow similar to female. Abdomen 

 black with light yellow markings ; dorsal and lateral spots on seg- 

 ments 1 to 3 ; narrow lateral cuneiform spots on segments 4 to 7, 

 gradually smaller hindward. Legs black. Wings hyaline, venation 

 black ; no basal yellow spot on posterior pair ; but on hind wings (in all 

 mature specimens) a large light yellow cloud between basal side of t 

 and nodus in longitudinal, over the whole breadth of wing in transverse 

 dimension. Pterostigma dark ferruginous to black, in most specimens 

 with a narrow light yellowish line at posterior margin. 9 to 10 Anq. 



Abd. 25, hdw. 29, pt. 3 mm T. stictica. 



Frons above brilliant metallic pure violet. Labium whitish with broad 

 median black band. Labrum and postclypeus blackish ; anteclypeus 

 and anterior margin of frons olivaceous. Thoracic dorsum blackish, 

 made dull violaceous by pruinosity ; sides olivaceoiis, with three broad 

 black bands : on mesepimeron, across metastigma and behind second 

 lateral suture ; these bands dorsally incomplete and longitudinally con- 

 fluent near dorsal end. Abdomen black with light ochreous markings ; 

 broad lateral and very small dorsal spots on segments 1 to 3 ; very 

 narrow lateral lines on segments 4 to 7, incomplete and sometimes 

 interrupted. Wings hyaline or very faintly greyish yellow ; venation in 



