EEPORT ON ECONOMIC ENTOMOLOGY 



81 



and golden bristles. Legs deep blackish-brown, with some of the segments with narrow 

 white basal bands, and a few scattered pale scales over the larger segments. Wings with 

 very deep brown and white scales. 



$ Head deep bluckish-brown, clothed with rather broad pale narrow-curved scales on 

 the occiput, smaller narrow-curved golden ones around the eyes and pale upright forked 

 scales, the sides with grey and black flat scales. Proboscis black scaled with a narrow white 

 band towards its base, and a few white scales here and there on the apical part ; palpi rather 

 swollen apically, clotlied witli deep lilaek scales, and with two irregular narrow bands of 

 white scales on the basal half ; clypeus black ; antennas very deep brown with brown 

 verticillate hairs ; basal segment deep black \\'ith grey sheen around the summit, and with 

 some small flat creamy scales. 



Thorax deep blackish-brown, clothed with narrow-curved, bronzy-brown scales and 

 irregularly ornamented with broader narrow-curved golden scales, with broadish narrow-curved 

 white and black scales at the siiles, just before the roots of the wings; a marked pale area in 

 front of the roots of the wings, and pale scales on each side of the bare space in front of 

 the scutelluni, nnich denuded, deep blackish-l)rown with curved pale golden scales on the 

 mid-lobe, with, apparently, a few Hat pale ones basally, side lobes with a few flat black 

 scales ; metanotum deep brownish-black ; pleuras deep brown, with small flat creamy scales. 



Abdomen densely clothed with flat black scales, with irregular apical, very narrow bands 

 of white scales, the last few segments with traces of median lateral creamy patches, and a 

 few scattered pale scales over all the segments. 



Legs black scaled, the metatarsi and first three tarsi of all the legs, with narrow white 

 basal bands, and a few pale scattered 

 scales on all the femora and tibia; ; 

 ungues equal and simple. 



Wings with large black and white 

 Mansonia scales, those on the sixth 

 vein large and irregularly heart-shaped ; 

 posterior border scales of the fringe 

 large, with long apical serrations, 

 continuations of the scale ribs ; first 

 sub-marginal cell longer and narrower 

 than the second posterior cell, their 

 bases nearly level, stem of the first 

 sul)-marginal rather more than one-third 

 the length of the cell ; stem of the 

 second posterior rather more than two- 

 thirds the length of the cell ; posterioi- 

 cross-vein about twice its own lengtli 

 distant from the mid. 



7-7 1 o Fin. 40. — Mansonia nigra, n. sp. 2 



jciKjtli. ±6 mm. ^ 



Hahltat. Sudan, Bine Nile (Mr. Friedrichs). 



Ohxi'rrafioiis. A very dark species, looking almost black, witli paler markings. The 

 wing scales present a slight modification in certain areas to the true Mansonia type, but 

 most are normal. Those on the sixth vein are very large and irregularly heart-shaped. 



Unfortunately the scutellum was partly denuded, but as far as I can detect there are 



