460 m. W. F. Kirby on the 



*12. J /alter Bettoni, sp. n. 



Dimensions. — 



J. 2- 



Long, corp 21 mm. 15 mm. 



Exp. al. ant 48 „ 46 „ 



Long. al. post. . . (circa) 50 „ 54 „ 



Body reddish brown, beak (except at the tip) and sides and 

 under surface of tiiorax testaceous ; abdomen slender, slightly 

 hairy towards the extremity. Fore wings hyaline, with 

 brown nervures, the costal nervure and the second median 

 nervure spotted with paler in the spaces between the trans- 

 verse nervures. Subcostal nervure slightly reddish. Towards 

 the extremity of the wing is a dark pterostigraa, filling up 

 the narrow oblong space between two approximate nervures, 

 but not extending quite to tlie costa. Hind wings very long 

 and slender, wliite, with a yellowish central line, from which 

 numerous small blackish T-shaped markings diverge asym- 

 metrically on each side. The extremity is broadly trifiabel- 

 late, with a reddish-brown band extending over the first ex- 

 pansion, except at the base, and the basal portion of the second ; 

 the terminal part of the wing snow-white. 



JIab. Maragoja Fundi, Tara Desert, British East Africa ; 

 a pair collected by Mr. C. S. Betton on March 3, 1897. 



A very distinct species, somewhat allied to the West- 

 African H. imperatrixj Westwood. 



The costal nervures vary in number from 33 to 37 before 

 the pterostigma on the fore wings, and are not uniform on 

 the two sides, showing that this is a variable character. 



■^13. Halter imperatrix. 



Nemoptera imperatrii, Westwood, Trans. Eut. Soc. Lond. (3) v. p. 507 

 (18G7) ; Thes. Ent. Oxou. p. ]78^ pi. xxxiii. fi^r. 8 (1874). 



Ilah. W. Africa. 



14. I /alter remipennis. 

 Nemoptera remipennis, Kolbe, SB. Ges. naturf. Fr. Berlin, 1900, p. 1.3. 

 JIaJ>. Nyassa, Usambara. 



15. [Jalttr toyonica. 

 Nemoptera togoyiica, Kolbe, SB. Ges. naturf. P'r. Berlin, 1900, p. 15. 

 Ilah. Togo, Upper Guinea. 



