498 A Monograph of Culicidae. 



two-thirds the length of the cell ; posterior cross-vein about twice 

 its own length distant from the mid. 



Length. — 4*3 mm. 



Habitat. — Sudan, Blue Nile (Mr. Friedrichs). 



Observations. — Avery dark species, looking almost black, with 

 paler, markings. The wing scales present a slight modification in 



5?5^~I 



Fig. 225. 

 Wing of Mansonia (?) nigra. 9 • Theobald. 



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 a few flat scales on the lateral lobes 

 left and a few at the base of the mid lobe. If these are in their 

 normal position the species must form the type of a new genus. 

 As there were some other detached scales on the scutellum, 

 clearly head scales, it may be that the flat ones are also stray 

 scales from another part of the body. 



The species is very marked, but the exact generic position 

 must be left pro tern. It probably comes in the next genus. 



Dr. Balfour, who sent the specimen, pointed out that there 

 were bluish purple and green scales laterally on the abdomen. 

 These could not be detected, probably owing to fading after death. 



Genus MANSONIOIDES. nov. gen 



&' 



Head clothed with narrow-curved scales, numerous upright 

 forked scales and flat lateral ones. Palpi of 9 rather long. 

 Mesothorax clothed with narrow-curved scales. Scutellum clothed 

 with flat scales on the mid lobe, narrow-curved ones on the lateral 

 lobes. "Wings with dense asymmetrical broad flat scales as in 

 Mansonia, with some large lanceolate ones beneath them. 



