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



at the tips ; remainder of the tarsi pale brown; fore femora 

 with two or three scattered erect bristles ; on the distal half 

 of the femora pairs of small erect bristles, including two at 

 the tip on the outer face. Wings with a pale greyish-yellow 

 tinge; stigma pale yellow; veins pale brownish yelloAv. 

 Venation : r inserted on R 2+z about one-third its own 

 length before the fork of the latter ; cell 1st M 2 closed, 

 m inserted between M 1+2 and M 3 . 



Abdomen pale brownish yellow (terminal segments 

 broken). 



Bab. Southern Nigeria. 



Holotype, sex?, Oshogbo (Dr. T. F. G. Mayer). 



Presented by the Entomological Research Committee, 

 1911. 422. 



Type in the collection of the British Museum (Natural 

 History). 



Trentepohlia (Mongoma) albilatissima, sp. n. 



Sew? — Wing 10 mm. 



Closest to T. albilata, Alexander (Cameroun), differing as 

 follows: mouth-parts, excepting the distal palpal segments, 

 light yellow. Antennas with the two basal segments light 

 yellow, the first flagellar segment dark brown ; remainder of 

 the antennas broken. Head light fawn-brown. 



Mesonotal prsescutum shiny reddish, without stripes. 

 Pleura shiny reddish yellow. Legs with the tibire largely 

 white, the brown postnasal band (2'5 mm.) a little shorter 

 than the pale base (3*1 mm.), the latter somewhat more 

 extensive than the pale femoral tip (2 mm.); the tibial tips 

 very broadly (10*8 mm.) white, this occupying nearly the 

 distal two-thirds of the tibia; tarsi white ; the hind legs are 

 quite similar, but the white apices are even broader (13 mm.), 

 the entire tibia measuring 18*6 mm. Wings greyish sub- 

 hyaline, the tips indistinctly darkened. Venation : r inserted 

 on i? 2+ 3 nearly its own length before the fork of the latter ; 

 m at the fork of R A+b and M i+i ; basal deflection of Cu x just 

 befork the fork of M. 



Abdomen broken. 



Hab. Gold Coast. 



Holotype, sex?, Aburi, 1912-1913 (W. H. Patterson). 



Type in the collection of the British Museum (Natural 

 History). 



The Very narrow brown tibial ring will readily distinguish 

 this fly from its near relative, T. (M.) albilata. 



