300 On new African Plileboiomic Di'ptera. 



quadrate blotch on vertex divided by narrow median grey 

 stripe and not extending to sidrs, extreme lateral margins of 

 front and an area next eye below each lateral frontal spot 

 light grey ; face and jowls smoke-grey, a dark seal-brown 

 elongate mark on upper part of face between eye and an- 

 tenna on each side, but not in contact with eye ; clove- 

 brown lateral frontal spots distinct, ovate, extending down- 

 wards and inwards, almost reaching frontal callus below and 

 aliove each in contact with eye by means of a narrow hori- 

 zontal pedicel, median frontal spot wanting in case of type ; 

 frontal callus tawny olive, rather narrow from above down- 

 wards, extending from eye to eye, but upper angles rounded 

 off, upper margin nearly straight, lower margin excavated 

 above antennae ; a small seal-brown spot or double spot in 

 middle line below callus ; palpi brownish isabella-coloured, 

 terminal joint moderately elongate but rather blunt at tip, 

 clothed on enter side with black hairs; first joint of antenna 

 cinnamon, greyish pollinose, very short, distinctly incrassate 

 when viewed from above, second joint somewhat paler, its 

 upper angle not conspicuously produced, third joint wanting 

 in case of type. Thorax : three stripes on dursuni entire and 

 parallel instead of converging posteriorly, median stripe 

 behind transverse suture much narrower than admedian 

 stripes, usual crescentic marks on hind margin indistin- 

 guishable in type ; pleurae yellowish grey ; scutellum with 

 median stripe and a patch at base on each side yellowish 

 grev- Abdomen : dorsum with a pair of orange-buff pollinose 

 admedian spots on third and eacb following segment, in 

 contact with hind margin and tending to become fused with 

 lateral yellowish pollinose patches ; venter with posterior 

 angles and extreme hind margins of segments yellowish 

 pollinose. Wings: rosettes simple, their borders not broken 

 up into spots; discal cell in type with a transverse light 

 mark at end of proximal and another at commencement of 

 distal third, and also with a small and duller light Heck at each 

 extremity ; in axillary cell zigzag mark and basal loop not 

 distinctly connected, light blotch on sixth longitudinal vein 

 bevond zigzag mark almost or quite obsolete ; usual series of 

 obli(iue light marks across posterior cells sharply defined ; 

 light marks in basal cells of normal type ; stigma mummy- 

 brown, long, and well marked, no light mark running up to 

 costa at its proximal extremity ; usual light loop (upper 

 portion of distal rosette) in marginal cell beyond stigma in 

 case of type represented merely by two small light flecks. 

 Hfilferes : knob Vandyke-brown, stalk cream-buff. Legs : 

 middle and hind tarsi pale cinnamon. 



