28G Mr. E. E. Austen on new 



of axillary cell ; usual series of oblique marks across poste- 

 rior cells partly broken up into spots ; markings iu basal 

 cells of normal type; a large light blotch on sixth longitu- 

 dinal vein, beyond zigzag mark; light loop in basal angle of 

 axillary cell large and well-marked, but not connected with 

 zigzag mark, which, in case of type, becomes indistinct before 

 reaching hind margin; discal cell with two transverse light 

 marks (the distal one interrupted) across median third, a 

 minute light fleck in proximal angle, and a large and con- 

 spicuous transversely elongate light mark close to distal 

 extremity ; stigma well-marked and conspicuous, dark 

 mummy-brown, an ill-defined cream-buff blotch next costa 

 at its proximal extremity, and, in case of type, an elongate 

 curved light mark (upper portion of distal rosette) imme- 

 diately beyond its distal end ; dark sepia-coloured quadrate 

 blotch below stigma extending to third longitudinal vein 

 without contracting in width, and conspicuous when wing is 

 viewed against a dark background. Halteres : knob sepia- 

 coloured, stalk-cream- buff. Legs : front tibiae slightly in- 

 crassate ; basal half or rather more of first joint of middle 

 tarsi, like bands on middle tibiae, cream-buff; hind tarsi of 

 type missing. 



Anglo-Egyptian Sudan : Blue Nile, 1905 (received from 

 Dr. Andrew Balfour). 



Hamatopota tacit urna resembles H. mactans, Austen, to a 

 certain extent in the abdominal markings, as also in the 

 apical sinuous mark in the wing being bifurcate, although, 

 in the case of the type of H. taciturna at any rate, the distal 

 ramus is not so close to the tip of the wing : the new species 

 can be distinguished from H. mactans by its darker wings, 

 in which, especially in the basal half, the light markings are 

 less extensive, by its much deeper and darker frontal callus, 

 darker antennas, and much narrower and less conspicuous 

 pale bands at the base of the front and hind tibia?. 



Hamatopota hirsutitarsus, sp. n. 



5 . — Length (1 specimen) 9 mm. ; width of head 3 mm. ; 

 width of front at vertex 1 mm. ; length of wing 8*6 mm. 



Dorsum of thorax dark sepia, with usual grey markings ; 

 dorsum of abdomen dark mummy-brown on second and third 

 segments, elsewhere dark sepia, hind margins of second and 

 following segments yellowish grey, sixth segment with pair of 

 small yellowish grey admedian spots on basal half, in typical 

 specimen faint indications of similar spots on three preceding 

 segments ; wings sepia, fairly dark, light markings sharply 



