32 Dr. C. P. Alexuiuler on African Crane-flies 



black ; gonapophyses of the male hypopygium shaped like a 

 furcula, the arms expaudecl into blades at their tips. 



Male. — Length 4— 4<'6 ram.; wing 5-5'3 ram. 



Rostrum and palpi dark brown. Auteunae black, tlie 

 distal flagellar segments more brownish ; second scapal 

 segment oval, tumid; two basal flagellar segments similar, 

 but much smaller ; remaining flagellar segments somewhat 

 elongated, enlarged at mid-length and here with moderately 

 long verticils. Head black, heavily light grey-pruinose. 



Pronotum dark brown. Mesonotal prsescutum with the 

 lateral margin narrowly but conspicuously light yellow; 

 disk pale grey with a broad, darker grey, median stripe and 

 broad, sooty-black, lateral stripes; remainder of the meso- 

 notum dark, sparsely pruinose. Pleura brown, sparsely 

 pruinose, the dorso-pleural membrane dull yellow. Halteres 

 brown. Logs with the coxse dark brown, pruinose ; tro- 

 chanters yellowish brown ; femora pale brown with rather 

 sparse, but conspicuous, long erect hairs ; remainder of the 

 legs darker brown, the erect hairs a little less conspicuous. 

 Wings with a dusky grey tinge ; veins dark brownish black. 

 Venation : Sc long, Sci ending beyond the fork of J?2+3; 

 aScj reti'eated some distance from the tip of Sc^, lying 

 immediately before the end of Rs ; Rs long and straight; 

 i?2+3 straight, a liitle shorter than the basal deflection of Cm, ; 

 r vt-ry faint, located on R^ at a distance from the fork of 

 /^2+3 that is about equal to this latter vein; R^ slightly 

 arcuated at its origin, so cell R^ is wide at its base ; veins R^, 

 and Rij^5 almost parallel, Mi+o slightly upcurved at its tip; 

 cell \st M2 opened by the atrophy of m ; basal dedection of 

 C'wi at about mid-length of vein M-^ ; Anal veins divergent. 



Abdomen dark brownish black, the appendages of the hy- 

 popygium horn-coloured. Alale hypopygium with the tei-gal 

 plate rather large, the caudal margin nearly circularly 

 concave, the lateral angles produced into slender cylindrical 

 horns that are directed caudad and slightly proximad ; 

 })leurites long, somewhat compressed, relatively slender, with 

 l)ut a single apparent appendage; this is relatively small, 

 gradually narrowed to the acute bristle-like tip, the face 

 provided with numerous setigerous punctures; just beyond 

 mid-length of the appendage a slender, cylindrical, thumb- 

 like appendage. Gonapophyses very conspicuous, appearing 

 as a furcula on the ventral face of the genital chamber ; 

 each arm is a prominent flattened blade, shaped somewhat 

 like a leg and foot, the toe produced into a long curved 

 point that is decussate with its mate of the opposite side ; 

 at the bascof the fork on the ventral face a slender, straight. 



