452 Mr. G. Mecade-Waldo on 



Labus aclelpTius, sp. n. 

 L.fnirjilis proxime affinis, sed abdomiais petiolo breviore, robustiore, 



^ . Black ; with the yellow markings exactly as in 

 L. fragilis S » except that the yellow fascia on abdominal 

 sternite 2 is unbroken. Antennae (absent in L. fragilis ^) 

 with terminal six joints of flagellum for the most part 

 testaceous beneath. 



Wing colour and neuration as in L. fragilis. Clypeus 

 subovate, shallowly emarginate at apex ; head as broad as 

 thorax at tegulae. 



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^. 



Presented by the Entomological Research 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 tbickness 

 throughout as in L./ra^i//5. Abdominal segment 2 is not 

 petiolate to tbe same extent as in L. fragilis. 



Labus fragilis, sp. n. 



Niger ; abdominis segmentorum 1, 2 margine postico pallide flavis, 

 petiolo longissimo, tenui. Alia cellula radiali praecipueiufuscatis. 



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

 tips of the anterior angles of pi'onotum, a small spot behind 

 tbe tegulae, narrow apical fascial on abdominal tergites 1 

 and 2, abdominal sternite 2 with broadly interrupted fascia, 

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

 yellow. Wings fuscous, especially along the costa and in 

 tbe radial cell ; the second cubital cell subpetiolate. 



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

 bi'oader than thorax ; scutellum andpostscutellum rounded, 

 median segment rounded, gradually sloping to apex. Petiole 

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

 its whole length, longer than tborax, but not so long as bead 

 and thorax together ; abdominal segment 2 at base one-half 

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



