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contained in the collection of the British Muséum, the records being 

 as follows : 



Uganda : Ruwenzori, altitude 6000-8000 feet (Scott Elliot); altitude 

 6000-8000 feet, November 1-2, 191 1 (S. A. Neave). 

 Mt. Kokanjero, southwest of Elgon, altitude 6400 feet, August 



9, 191 1 (S. A. Neave). 

 Mpanga Forest, Toro, altitude 4800 feet, November 13-23, 



191 1 (S. A. Neave). 

 Daro or Durro Forest, Toro, altitude 4000-4500 feet, October 



25-29, 191 1 (S. A. Neave). 

 Mabira Forest, Chagwe, altitude 3500-3800 feet, July 16-25, 



1911 (S. A. Neave). 

 Between Sewiza River and Kampala, altitude 3500-3750 feet, 

 August 27-31, 1911 (S. A. Neave). 

 British East Africa : Upper Kuja Valley, South Kavirondo, altitude 

 4200 feet, May 5-8, 191 1 (S. A. Neave). 

 Yala River, south edge of the Kakamega Forest, altitude 

 4800-5300 feet, May 21-28, 191 1 (S. A. Neave). 

 A more detailed description of the species may be given. 

 Maie. — Length 10 mm.; wing 11.5 mm.; antennae about 6.8 mm. 

 Female. — Length 14.5 mm.; wing 12.5 mm. 

 General coloration of the body deep velvety black, the head, 

 antennal scape, and anterior half of the mediotergite of the mesonotal 

 prsescutum fiery orange. Hypopygium black, except the pleural ap- 

 pendages which are light yellow. Antennze of maie, if bent backwards 

 extending about of the end of the third abdominal segment. Occipital 

 brand triangular, conspicuous, black. 



Maie hypopygium rather similar in structure to that of N. fumid- 

 apicalis Alexander. Ninth tergite with a deep U-shaped médian 

 notch, the margin with small blackened tubercles and spines, the 

 posterior face with a flattened blade that is minutely serrate. Outer 

 pleural appendage long, tapering to the nearly acute tip, the base 

 narrowed, the tip long and slender. Inner pleural appendage a flat- 

 tened blade with an acute spine at the posterior outer angle, this 

 shorter than in N. fumidapicalis. Gonapophyses with the blades slen- 

 der, of nearly equal width throughout their length, the tips acute. 

 Ninth sternite with a conspicuous médian dépression filled with 



