452 Mr. G. Meade-WalJo on 



Lahus adelphus, sp. n. 

 L.frar/ilis proxime afliais, sed abdomiais petiolo breviore, robustiore, 



^ . Black ; with the yellow markings exactly as in 

 L.fragilis cJ , except that'^the yellow fascia on abdominal 

 sternite 2 is unbroken. AntcniicC (absent in L. frayilis J) 

 with terminal six joints of Hagellum for the most part 

 testaceous beneath. 



Wing colour and neuration as in L. frag His. Clypeus 

 subovate, shallowly eraarginate at apex ; head as broad as 

 thorax at tegulse. 



Petiole less than 3 mm. in length, equal in length to 

 thorax, gradually widening from base to apex, the apex 

 being twice as broad as the base; base of abdominal seg- 

 ment 2 as wide as petiole at apex. 



Pubescence as in L. fragilis. Whole rather coarsely 

 punctured, abdominal segments 3-7 more finely. 



Length 8 mm. 



Hub. Mabira, Uganda (18. ix. 1910) (C. C. Gowdey) ; 1 c?. 



Presented by the Entomological Kesearch Committee 

 (Tropical Africa). 



The species very closely resembles L. fragilis, but is easily 

 distinguished from it by its stouter build. 



The petiole is totally different, being quite twice as wide 

 at the apex as at the base and not of uniform thickness 

 througliout as in L. fragilis. Abdominal segment 2 is not 

 petiolate to the same extent as in L. fragilis. 



Labus fragilis, sp. u. 



Nij^er; abdominis segmentorum 1, 2 margine postico pallido flavis, 

 petiolo longissimo, tenui. Alia celhda radiali praecipueiufuscatis. 



$ . Black; two minute spots on apex of clypeus, extreme 

 tips of the anterior angles of pronotum, a small spot behind 

 the tcgulae, narrow apical fascia? on abdominal tcrgites 1 

 and 2, abdominal sternite 2 with broadly interrupted fascia, 

 anterior tibiie in front and a spot on posterior tibiae, pale 

 vellow. Wings fuscous, especially along the costa and iu 

 the radial cell ; the second cubital cell subpetiolate. 



Clypeus as broad as loug, subovate, convex ; head massive, 

 broader than thorax ; scutellum and postscutcllum rounded, 

 median segment rounded, gradually sloping to apex. Petiole 

 of abdomen 3 mm., truncate anteriorly, of uniform width iu 

 its w hole length, longer than thorax, but not so loug as head 

 and thorax together ; abdominal s^egment 2 at base one-half 

 as narrow as petiole at apex, subpetiolate, cup-shaped, about 



