The Crane-flies of South Africa (Diptera, Tipulidae). 161 



vertex, this with a deep median furrow ; head yellowish-brown with 

 an indistinct narrow darker median line. 



Thorax dull brownish-yellow with three rather indistinct brown 

 stripes on the praescutum ; scutum and postuotum brown, the 

 scutellum more yellowish. Pleura yellow, the mesopleura largely 

 brown with a sparse pale bloom. Halteres elongated, pale yellowish, 

 the bases of the knobs dark brown, the apices brighter. Legs with 

 the coxae small, greyish-yellow with a bloom ; trochanters yellow 

 suffused with brown ; femora brown, paler at the extreme base, the 

 tip black, a subequal pale yellow ring just before the tip ; tibiae dark 

 brown, the tips narrowly darker ; tarsi dark brown ; tibial spurs very 

 short. Wings with the basal half pale greyish, the apical half more 

 hyaline ; stigma prominent, rectangular, dark brown ; pale brown 

 marks at the base of M, origin and fork of Rs and along the basal 

 deflection of Cu^ ; tip of the wing in cell E 2 a little darkened ; a 

 narrow hyaline streak in cell R just before the bend in the sector ; 

 base of the wing more hyaline. Venation (Plate XI. fig. 22), Sc 2 

 entering R^ just beyond the fork of Rs ; Rs rather long, angulated 

 and spurred at its origin ; cell R* large, vein R% oblique, the radial 

 cross-vein somewhat indistinct ; vein M strongly arcuated just before 

 its fork ; basal deflection of Cu-^ at the fork of M and fused with M^ 

 for a distance about equal to the deflection of Cu^ alone ; second anal 

 rather short and straight. 



Abdomen with the basal tergites pale yellow, the second segment 

 with the intermediate portion dark brown ; third to sixth tergites 

 blackish basally, the apices broadly silvery ; a large yellowish sub- 

 apical area ; seventh segment largely yellow ; eighth and ninth seg- 

 ments black ; sternites dark brown, the caudal margins broadly 

 silvery; third to sixth sternites with a narrow linear yellow mark on 

 the mid-line and a yellowish subterminal area ; eighth and ninth 

 segments dark brown. Male hypopygium with the ninth tergite 

 black, the sclerite arched so that the caudal margin (Plate XIV, fig. 54) 

 appears to be very broadly V-shaped ; the dorsal surface with 

 numerous black semi-appressed hairs. Ninth pleuro-stemite exten- 

 sive, profoundly incised beneath on the mid-ventral line, projecting 

 beyond the caudal margin of the ninth tergite, the surface with 

 numerous long hairs ; pleural appendages two (Plate XIII, fig. 43), 

 the outer one slender, the extreme base narrowed, the knob elongate 

 with a very few scattered hairs ; inner appendage compressed, ending 

 in a slender, finger-like lobe that projects into the notch of the 

 tergite, the outer margin of the sclerite with numerous outstretched 

 black hairs giving a hystriciform appearance to the appendage. 



