8 Dr. 0. P. Alexander on African Crane-flies 



Mcsonotal prpescutvim reddish brown with a broad, brown, 

 median stripe ; scutal lobes dark brown; median area of the 

 scutum and the base of the scutellum obscure yellow ; 

 remainder of the mesonotum dark brown. Pleura reddish 

 brown without stripes. Halteres moderately elongated, the 

 stem obscure yellow, passing into the dark brown knobs. 

 Legs with the coxae and trochanters brownish yellow ; femora 

 dark brownish black, the bases a little paler ; a very obscure, 

 narrow, reddish ring before the broad black tip ; remainder 

 of the legs black. Wings with a faint yellow tinge, with 

 brown spots and dots scattered in all the cells, these heavier 

 and more distinct in the cells of the costal half of the wing, 

 very pale, ill-defined, and confluent in the caudal cells ; these 

 marks consist of a series of brown spots in cells C and Sc ; 

 a large i)rown spot at the origin of Rs, including cell Sc ; a 

 larger spot at the tip of Sc^ ; stigma oval, dark brown, 

 entire ; wing-tip at the end of vein /?2+3 darkened ; the 

 spots in the radial cells are more scattered, but in the caudal 

 cells they are so numerous and approximate that their limits 

 become ill-defined and the general coloration of these cells 

 of the wing becomes pale brown ; veins dark brown. Vena- 

 tion : Sci ending almost opposite or but slightly before the 

 fork of Rs ; Sc2 at the tip of Sc^ ; r at the tip of i?i and 

 subequal to this tip ; basal deflection of Cui at the fork 

 of ili. 



Abdominal segments dark brown, the centres of the disk 

 more reddish ; hypopygium brown, 



Hab. Gold Coast. 



Holotype,S, Bibiani, October, 1910 {Dr. H. G. F. Spurrell). 



Type in the collection of the British Museum (Natural 

 History). 



Limnobia poecila is generally similar to L. rkanteria, but 

 is readily told by the diagnostic characters listed above. 



Limnobia sokotrana^ sp. n. 



Antennae black, the segments not conspicuously elongated, 

 verticils short ; vertex very narrow between the eyes ; 

 mesonotum obscure greenish yellow with a broad blackish 

 median stripe ; pleura yellow, with a conspicuous, longi- 

 tudinal, brown stripe; halteres with the knobs yellow; legs 

 with the femora long and slender, light brown, the tips dark 

 brown and with a yellowish subapical ring ; wings pale 

 greyish yellow, with a few brown spots and seams at the 

 ends of the veins in the costal region and along the cord ; 

 all the cells of the wing dotted with pale brownish grey ; 



