2U 



On a new Species of Oligoneuiia. 



(c/. text-figure) . These are numerous (about 30) and straight 

 in the marginal area, but are mostly concealed in the dried 

 insect so far as the subcosta is overlaiu in the longitudinal 



Neuration of Oli(/07ieuria dobbsi, sp. n. 



furrow in front of the ridge crested by the radius (3) ; the 

 next three open areas contain respectively about 15, 7, and 5 

 cross-veinlets, of which many are obsolescent posteriorly, 

 and are too delicate to be shown in the figure. The 

 two subfiliform tails terminating the narrow membrane 

 incurrent along the posterior edge of the mesonotum or 

 scutellum from the roots of the fore wings seem long enough 

 to reach the base of the third abdominal segment. Head, 

 body, fore legs, and the stout portions of the hinder legs 

 pitch-brown ; head opaque ; thorax and dorsum lucid ; 

 venter pallid ; tabescent hind tibia and tarsi impure 

 whitish. Abdomen tapering posteriorly ; segments nos. 6, 7, 

 and 8 longer than those anterior to them, of which the poste- 

 rior lateral angles (if not rectangular) are produced into only 

 very short, inconspicuous, tooth-like points ; but in segments 

 nos. 8 and 9 the points produced are spiniform. Setae 

 broken off when captured. Egg-masses lutescent, pale. 

 Subanal lamina of the tenth segment narrow, shrunken 

 troughwise in the dried insect, and produced on each side 

 posteriorly into a broad-based, short, subulate spine. 



Length of body about 20, of fore wing 25 mm. 



Prep. Etn.; wings in Ca. balsam, mounted without pres- 

 sure, detached from the pinned tvpe-specimen (Brit. Mus. 

 Nat. Hist.). 



Hab. Sotik Post (alt. 6000 feet), Lumbwa District, British 

 East Africa : one adult fly, captured at night in a house half 

 fl mile from the river Nyangoris, 22. viii, 1911 (C. M. Dobbs), 



