110 Mr. E. E. Austen on new 



representing an incomplete outer branch of apical sinuous 

 mark ; a series of usually large and conspicuous light blotches 

 on hind margin in distal angles of all posterior cells (or all 

 except fourth posterior cell), with an additional blotch on 

 distal extremity of sixth longitudinal vein, occupying tips of 

 axillary and anal cells, and proximal marginal angle of fifth 

 posterior cell ; usual series of detached oblique light marks 

 across posterior cells distinct ; central portion of middle and 

 distal rosettes usually occupied by a series of light spots, 

 surrounding distal extremity of discal cell and fork of third 

 longitudinal vein respectively ; stigma seal-brown, of mode- 

 rate length, at its proximal extremity a conspicuous light 

 mark, formed by an upward extension from proximal rosette 

 to costa ; discal cell with two transverse light marks, which 

 are sometimes approximate, in its median portion, and a 

 larger or smaller light spot or crescentic mark near its distal 

 extremity, sometimes also with a minute light fleck in its 

 proximal extremity; markings of basal cells as in foregoing 

 species ; first costal cell and second costal cell as far as pale 

 mark before stigma lightly infuscated. Halteres cream-buff, 

 knob seal-brown at base above and below. Legs : front 

 tibiae not or scarcely incrassate, pale band not broader than 

 broadest bauds on middle and hind tibiae ; middle tibiae 

 sometimes buff at extreme base. 



Nyasaland Protectorate, 1907 (Dr. J. E. S. Old). 



In fades and markings this species resembles the South 

 African Hcematopota ruficornis, Walk., from which, however, 

 it can at once be distinguished by the much less deep frontal 

 callus, the narrowness of the band on the front tibiae, and 

 the dark stripe on the veuter ; from the following species, to 

 which it is also similar in facies, H. stimulans may be distin- 

 guished, inter alia, by the shape of the frontal callus, the 

 presence of a distinct median stripe on the dorsum of the 

 majority of the abdominal segments and the smaller size of 

 the admedian spots, and above all by the broad light bar 

 connecting the loop and zigzag mark in the axillary cell. 



Hcematopota insidiatrix, sp. n. 



? . — Length (5 specimens) 8'4 to 10'5 mm. ; width of 

 head 3 to 3'6 mm.; width of front at vertex 1 to 1*4 mm. ; 

 length of wing 8 to 9*6 mm. 



Dark mammy-brown ; dorsum of thorax with narroiv, longi- 

 tudinal, smoke-grey stripes, dorsum of abdomen with a double 

 series of large smoke-grey or drab-grey rounded spots ; thorax 

 and scutellum as in foregoing species ; dorsum of abdomen 



