10 Dr. C. P. Alexander on African Crane-flies 



long outer deflection of M^ ; basal deflection of Ciii 

 immediately before the fork of M. 



Abdominal tergites one and two, and the sides of three 

 dark brown ; caudal margin of segments two to seven 

 obscure yellow, tlie remaining tergites reddish yellow ; 

 sternite yellow. 



Hab. Island of Sokotra. 



Holotype, ^, Adho, Diemellus, altitude 3500 feet, 

 February 15, 1899 {W. R. O. -Grant), B.M. no. 1903. 75. 



Type in the collection of the British Museum (Natural 

 History). 



Limnobia nyasaensis, sp. n. 



Antennae black, the flagellar segments pale at their tips ; 

 head dark-coloured, grey-pruinose; raesonotum reddisli 

 yellow with an anterior dai'k brown median stripe on tlie 

 prsescutum ; femora with the tips broadly dark brown ; 

 wings pale yellow, the costal and subcostal cells brighter, 

 the membrane dotted with brown, the origin of Rs and r 

 seamed with darker brown. 



Male. — Length about 6 mm.; wing 9*3 mm. 



Female. — Length about 8 mm. ; wing 9*4 mm. 



Rostrum and palpi dark brownish black. Antennae black, 

 the distalends of the intermediate segments pale to produce 

 a bicolorous appearance ; basal flagellar segments sub- 

 globular, the intermediate oval, the distal segments elongate- 

 oval. Head dark-coloured, grey-pruinose. 



Pronotum reddish yellow Avith a dark brown median 

 stripe. Mesonotal prfescutum similar, with an anterior dark 

 brown median line that becomes bifid and obliterated at 

 about mid-length of the sclerite ; remainder of the meso- 

 notum and the pleura reddish yellow. Halteres rather long 

 and slender, pale brown, the knobs dark brown. Legs with 

 the cox-te and trochanters reddish yellow ; femora brownish 

 vellow, the tips broadly dark brown ; tibiae light brown, the 

 tips narrowly dark brown ; tarsi dark brown. Wings pale 

 yellow, the costal and subcostal cells brighter ; a dark brown 

 seam at the origin of Bs and along ;• and the tip of i?i ; 

 narrow, paler brown seams along the cord and outer end of 

 cell 1st i/2 ; scattered pale brown dots in all the cells as in 

 L. irrorata, their number and position somewhat variable. 

 Venation : Sc rather long, ending opposite about two-thirds 

 the length of Rs, Sc2 at the tip of Sc^ ; r at the tip of i?i, 

 the latter being equal to or about twice the length of the 

 former : cell 1st nL closed, irregularly pentagonal, m being 



