106 Mr. E. E. Austen on new 



base, instead of regularly expanding from the base towards 

 the tip, by the third joint being broader at the base and less 

 elongate, and by various differences in the wings, such as 

 the shorter stigma, more distinct light mark at the proximal 

 extremity of the latter, wider opening in the upper margin 

 of the distal rosette, and shorter appendix to the fork of the 

 third longitudinal vein. 



Hamatopota mactans, sp. n. 



$ . — Length (8 specimens) 9*G to 115 mm. ; width of 

 head 3 to 3*6 mm. ; width of front at vertex 1 mm. to just 

 over 1 mm. ; length of wing 8 to 9'3 mm. 



Seal-brown to clove-brown ; dorsum of thorax with smoke- 

 grey markings, scutellum, except a broad hind border {some- 

 times interrupted in middle line), smoke-grey; dorsum of 

 abdomen with hind margins of all segments and a median 

 stripe on second to sixth segments inclusive drab-grey or 

 smoke-grey , fourth and following segments each with a pair of 

 narrow elongate grey spots extending backwards from front 

 margin but not reaching hind margin ; wings mouse-grey, 

 light markings milky, apical sinuous mark bifurcate, stigma 

 dark brown, very conspicuous ; leys clove-brown or seal-brown, 

 middle femora except tips lighter, a single bund on front tibia?, 

 two bands on middle and hind tibia?, and basal half or two- 

 thirds of first joint of middle and hind tarsi cream or cream- 

 buff. 



Head: front, face, and jowls smoke-grey, a narrow dark 

 brown or clove-brown interrupted cross-band on upper 

 part of face beneath antennae; frontal callus mummy-brown, 

 of median depth, extending from eye to eye, upper and lower 

 margins straight ; a small seal-brown A-shaped median mark 

 below callus ; median as well as lateral frontal spots con- 

 spicuous, clove-brown, lateral spots in contact with eyes ; 

 some yellowish-white hairs below each lateral spot, curving 

 downwards over callus ; palpi isabella-coloured, terminal 

 joint sometimes blackish towards tip on outer side, moderately 

 expanded at base, where it is clothed on outer side with 

 rather long pale yellowish hair, clothed elsewhere on outer 

 side with short black hairs ; antenna? dark brown, first joint 

 greyish pollinose, paler on inner side at base, and sometimes 

 entirely or almost entirely ochraceous-buflf, incrassate 

 (elongate oval when viewed from above), with a well-marked 

 constriction before tip when viewed from outer side, second 

 joint with upper angle moderately produced, third joiut of 

 moderate breadth, tapering but not markedly elongate, paler 



