338 MONOGRAPH OF THE GENUS SYNTHKMIS, 



Females. 



(Four to five cross-veins in basilar space, eight to nine 

 in submedian S.miranda. 

 Not more than four cross-veins in basilar space, nor 

 eight in submedian 2. 



j Segment 8 with a conspicuous ovipositor 3. 



I Segment 8 without a conspicuous ovipositor 4. 



(Ovipositor very long, reaching beyond end of seg- 

 ment 10 S. primigenia. 

 Ovipositor not reaching beyond end of abdomen 5. 



(Thorax with a pair of antehumeral stripes 6. 



Thorax without antehumeral stripes; colour black 

 and yellow S. regina. 



) Thorax with four antehumeral creamy spots .S^. leachii. 



( Thorax without antehumeral stripes or spots 7. 



/'Thoracic antehumeral stripes yellow; colour metallic 



J black and yellow S. claviculata. 



\ Thoracic antehumeral stripes pale bluish or creamy, 



\^ short; size of insect small S. cyanitincta. 



( Lateral thoracic stripe entire 8. 



J Lateral thoracic stripe broken into a rounded and 

 I an elongated spot; colour pinkish-brown with 



1^ creamy spots. .. S. macrosiigma, 



' Appendages in profile rather oval and flat; colour of 



abdomen blackish with yellow spots S. eustalacta. 



8.- Appendage in profile narrower and more cylindri- 

 cal; colour of abdomen dark brown with paler 

 yellow spots; insect smaller than above S. tasmanica, 



1. Synthemis eustalacta Burra. (Plate iv., fig. 1.) 



Burmeister, Handl)k. Entom. Nevropt. 18.39: Selys, Bull. Acad. 

 Belgique, xxxi. 1871; xxxvii. 1874. 



(J. Total length 51 mm., abdomen .38 mm., liindwing 32 awn. 



Wings : Costa jfellowish outwards, pterostigma 2*5 mm., dark 

 brown between black nervures; memhranule 2 mm., dull grey. 

 Three cross-veins in basilar space, 4-5 in submedian space; all 

 triangles usually free. Head: Eyes brilliant greenish (when 

 alive), bordered with dark brown, a pale yellow patch behind; 

 vertex hairy, black; front hairy, cleft medially, pale yellow above 

 and on sides, brown on face, black in median cleft; postclypeus 

 brownish, a yellow .spot on each side; anteclypeus brownish, 

 touched with pale yellow; labrum yellow edged with brown; 

 labium pale yellowish-grey, mouth edged with dark brown. 



