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



Holotype, $ , Higo Samula, October 30, 1911 (R. J. 

 Stordy). B.M. no. 1912. 329. 



Type in the collection of the British Museum (Natural 

 History). 



Limnophila unijuga, sp. n. 

 Head light grey ; mesonotum light brownish yellow ; a 

 capillary dark brown dorso-median line extending from the 

 head to the base of the abdomen ; femora dark brown with 

 an indistinct yellowish ring before the tips ; wings light 

 yellow with a narrow, dark brown cross-band at the cord 

 and small brown spots at the ends of all the veins ; i? 2 +3 

 short, cell M x present. 



Male. — Length 9 mm. ; wing 10 mm. ; hind leg, femur 

 7*2 mm., tibia 8 mm. 



Female. — Length 11*5 mm. ; wing 11*4 mm. 

 Rostrum and palpi dark brown. Antennae with the first 

 segment elongate, black ; second scapal and first five 

 flagellar segments bicolorous, the basal half dull yellow, the 

 apical half dark brown ; distal flagellar segments elongate, 

 dark brown ; basal flagellar segments narrowed basally, 

 more enlarged distally. Head light grey with a conspicuous, 

 capillary, black median line that is split and enlarged at its 

 anterior end between the eyes ; remainder of the vertex with 

 scattered dark brown setigerous punctures ; head somewhat 

 narrowed behind, but not so accentuated as in Pseudolim- 

 nophila. 



Pronotum light fawn-coloured, dark brown medially ; 

 prosternum between the large fore coxae narrow. Meso- 

 notal praescutum light brownish yellow with a capillary dark 

 brown median line ; tuberculate pits retreated rather far 

 back to beyond mid-length of the distance to the pseudo- 

 sutural foveae, one on either side of the capillary median 

 line above described ; remainder of the mesonotum pale 

 greyish yellow, the median line becoming much broader and 

 darkening into black. Pleura dull yellow, the mesopleura 

 iudistinctly greyish-pruinose. Halteres dull yellow, the 

 knobs dark brown. Legs with the coxae and trochanters 

 dull yellowish ; femora dark brown, the bases narrowly 

 paler ; an indistinct obscure yellowish ring before the 

 nearly subequal dark brown tips ; tibiae and tarsi dark 

 brown. Wings with a strong yellowish tinge, sparsely 

 marked with dark brown spots and seams, the most con- 

 spicuous being a dark seam along the cord ; these marks are 

 as follows : at the origin of Rs ; a narrow brown seam along 

 the cord and outer end of cell 1st M 2 , in the female the 



