BY R J. TILLYARD. 749 



should also notice the peculiar anal triangle of the male, in which 

 all signs of a supplementary membranule have disappeared; the 

 outer side, forming the anal margin of the wing, has been 

 strengthened by assuming a convex shape, making the triangle 

 itself small but comparatively broad, while the cross-nervule 

 usually present in this genus here appears as a tiny veinlet quite 

 •close up to the lower angle of the triangle. 



8. Synthemis claviculata,* n.sp. (Plate xxii., fig.5). 



<J. (Unique). Total length 48 mm.; abdomen 37 mm.; fore- 

 wing 31*5 mm.; hind wing 30 mm. 



Wings: neuration fine, black, costa pale brown at base; 

 bases of all wings slightly saffroned; pterostk/ma short, 2 mm., 

 black; membranule, fore, very small; hind, narrow, 2 mm., 

 pale greyish touched with brown; one cross-nervule in basilar 

 space, three or four in submedian; a conspicuous yellow spot on 

 each wing-base; first two or three postnodals of all wings not 

 continuous; one cross-nervule in hypertrigonal space of forewings, 

 those of hindwings free. Nodal Indicator 11 7-8 Head: 

 eyes brown; occiput small, black; vertex steely 7-8 8 black with 

 a round yellow spot; front hairy, deeply cleft medially, steely- 

 black, with two very large yellow spots reaching to the eyes and 

 separated by a narrow black band in the median cleft; clypeus 

 steely-black; labrum with two large yellow spots separated and 

 surrounded by a narrow black band; labium black. Thorax: 

 prothorax very small, dull brownish. Meso- and metathorax with 

 long brown hairs in front; colour black above with a broad short 

 humeral yellow band on each side, placed well forward, and cut 

 short suddenly behind at a distance of nearly 2 mm. from the 

 fore wing-join; a tiny yellow spot near latter; dorsal ridge with 

 a yellow line, enlarged on meeting the interalar ridge, on each 

 side a very broad steel-coloured band, then a complete lateral 



* Named from the peculiar form of the appendages. 

 63 



