358 MR. W. WESCHE ON THE NEW 



connected at its base with the first by a transverse vein which continues and 

 forms the usual basal connection with the fifth. 



Length of head and proboscis 3| mm., length without proboscis 4i mm. 



Habitat. Obuasi, Ashanti. ^ caught on flower ; ? in swamp, ? in bush- 

 path, ?on flower. 



Described from four specimens in the British Museum, bearing date 

 1 Sept., 1907, and collected by Dr. W. M. Graham. 



(Jeratocheilus, gen. nov. 



Small flies with the chai'acteristic antennae and proboscis, but are distin- 

 guished by the wing-venation and pigmentation. 



Head, proboscis, antenna?, eyes, thorax, legs, and abdomen as in Neoeerato- 

 cheilus. 



Wings with stigmata and clouded transverse veins ; auxiliary and first 

 vein clearly separated, the hitter ending a short distance after the auxiliary 

 and forming a small second medastinal cell ; second vein short but present, 

 third simple ; no transverse vein at the base of the fourth longitudinal vein, 

 which leaves the fifth at a sharp angle, and the posterior transverse vein joins 

 the fourth longitudinal in the first third of the discal cell. 



Ceratocheilus Winn-Sampsoni, sp. n. (PL 49. figs. 1-3, 6-9.) 



Head globular ; proboscis more than half the length of head and body 

 combined. 



Antennse of usual type, but seen with the microscope are found to have 

 eight joints in the male and eleven in the female, without reckoning an; 

 atrophying distal joint. 



The eyes occupy almost all the head, only leaving bare a narrow space 

 under as well as on the front. 



Thorax, abdomen, and legs as in JS'. Grahami as regards structure ; colours^ 

 cannot be given, as the species is described from bleached preparations. 



Wings with the second longitudinal vein very short ; all the transverse- 

 veins are clouded and the whole surface is somewhat smoky, except at the 

 tip, where a clear space stretches across the ends of the third and fourth 

 veins to the middle vein of the discal cell ; there is a dark mark on the first 

 and auxiliary vein near the middle of the wing, and a stigma at their junction 

 with the costa ; there are nebulae at the ends of the fifth lono-itudinal and of 

 the two lower veins that spring from the discal cell. 



Length of head and proboscis J 4 ram., of which more than 3 go to the 

 proboscis; of ? 5 nun. Length of S without proboscis 4^ mm.; of 

 ? 6 mm. 



Bahitat. Southern Nigeria. (^ caught on dining-table ; ? at Warri. 



