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



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

 witli 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 yellow. 

 Venation : r inserted on i?2+3 about one-third its own 

 length before the fork of the latter ; cell \st M2 closed, 

 m inserted between Mi_^2 and M^. 



Abdomen pale brownish yellow (terminal segments 

 broken). 



Hab. Southern Nigeria, 



Holotype, sex ?, Oshogbo [Dr. T. F. G. Maijer). 



Presented by the Entomological Research Committee, 

 1911. 422. 



Type in the collection of the British Museum (Natural 

 History). 



Trentepohlia {Mongoma) albilatissima, sp. n. 



Sex 7 — Wing 10 mm. 



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

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

 light yellow. Antennae with the two basal segments light 

 yellow, the fii'st flagellar segment dark brown; remainder of 

 the antennffi broken. Head light fawn-brown. 



Mesonotal prsescutum shiny reddish, without stripes. 

 Pleura shiny reddish yellow. Legs with the tibire largely 

 white, the brown postbasal 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 Avhite ; 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 Roj^z nearly its own length before the fork of the latter ; 

 m at tiie fork of -R4+5 and Jij+aJ basal deflection of C'mj just 

 befork the fork of M. 



Abdomen broken. 



Hab, Gold Coast. 



Holotype, sex?, Al)uri, 1912-1913 {W. H. Patterson). 



Type HI the collection of the British Museum (Natural 

 History). 



The very narrow brown tibial ring will readily distinguish 

 this fiy from its near relative, T. [M.) albilata. 



