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



long outer deflection of M ; basal deflection of O/, 

 immediately before the fork of M. 



Abdominal tergites oue and two. and the sides of three 

 dark brown : caudal margin of segments two to seven 

 obscure yellow, the remaining tergites reddish yellow; 

 sternite yellow. 



Hab. Islaud of Sokotra. 



Holoti/pe, £ . Adho. Diemellus, altitude 3500 feet, 

 February 15. 1899 (IV. R. 0. -Grant . B.M. no. 1903. 73. 



Type in the collection of the British Museum (Natural 

 History). 



Limnobia nyasaensis. sp. n. 



Antennas black, the flagellar segments pale at their tips ; 

 head dark-coloured, grey-pruinose ; mesonotum reddish 

 yellow with an anterior dark brown median stripe on the 

 praescutum ; femora with the tips broadly dark brown; 

 wmgs pale yellow, the costal and subcostal cells brighter, 

 the membrane dotted with brown, the origin of Rs and /• 

 seamed with darker brown. 



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



Female. — Length about 8 mm. ; wing 9'-4 mm. 



Kostrum and palpi dark brownish black. Antennas black, 

 the distal ends 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-pruiuose. 



Prouotum reddish yellow with a dark brown median 

 stripe. Mesonotal praescutum 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 coxae 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 

 vellow. the costal and subcostal cells brighter ; a dark brown 

 seam at the origin of Rs aud along r and the tip of B x ; 

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

 cell 1st Si* ; 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. Sc s at the tip of Sc x : r at the tip of R u 

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

 former ; cell 1st M % closed, irregularly pentagonal, m being 



