70 INSECUTOR insciti;e menstruus 



longed on ventral surface at apex ; sense cones short, slender, 

 and pointed. 



Prothorax about 0.38 as long as head and (inclusive of 

 coxae) about 1.88 times as wide as long, surface smooth, with- 

 out tubercles or tooth-like projections ; all usual bristles pres- 

 ent, pointed, the two pairs at posterior angles moderately long, 

 others minute and scarcely distinguishable from the several 

 minute bristles scattered about the disk. Wings of equal width 

 throughout, the fore pair with ^bout 32 accessory hairs on 

 posterior margin near apex, and with the outer of the three 

 subbasal bristles long, pointed, and twice the length of the two 

 others, which are blunt. Fore femora slender, unarmed ; fore 

 tibise and tarsi unarmed. 



Abdomen broadest at segment 2, where it is about 1.17 times 

 the width of prothorax, slender and tapering roundly to tube, 

 dorsal surface finely reticulate with anastomosing lines ; seg- 

 ment 8 only slightly longer than segment 9 and only 0.39 as 

 long as tube. Tube about 0.79 as long as head and about 4.6 

 times as long as basal width, which is just twice the apical. 



Measurements of holotype ( female) : Length 4.88 mm. ; 

 head, length 0.738 mm., width across eyes 0.241 mm., width in 

 front of eyes 0.114 mm., width behind eyes 0.204 mm., width 

 at base 0.207 mm., length of produced part 0.186 mm. ; eyes, 

 length 0.15(i mm., width 0.076 mm. ; postocular bristles, length 

 0.024 mm. ; prothorax, length 0.281 mm., width (inclusive of 

 coxae) 0.528 mm.; pterothorax, width 0.576 mm.; abdomen, 

 greatest width 0.61 (I mm., length of segment 8, 0.228 mm., 

 length of segment 9, 0.216 mm.; tube, length 0.582 mm., width 

 at base 0.126 mm., at apex 0.0()3 mm. 

 Antennal segments : 1 2 3 



Length (n) 84 90 288 



Width (Li) 60 50 45 



Total length of antenna, 1.106 mm. 



Described from one female taken by Lieut. A. W. Jobbins- 

 Pomeroy, of the Nigeria Regiment, British Expeditionary 

 Force, on the Rufigi River, East Africa, June 1, 1917. The 

 specimen was flying when collected. 



