399 



femora and the tibiœ more or less broadly, red ; wings hyaline, the 

 stigma and nervures black ; the 3 r ' 1 abscissa of the radius one fourth 

 of the leagth of the 2 ,ul , broadly roundly curved, not converging 

 much ; the 2' 1 ' 1 obliquely bent outwardly behind. Mesonotum 

 strongly, irregularly striated (but not closely) on the basai two- 

 thirds ; the metanotum more fmely and closely striated. Scutellum 

 irregularly, longitudinally striated. Ç. 



Length 21 mi 11. 



Lukombe, 5 th October (A. Koller). 



Densely covered with a white pile, the face and clypeus also 

 with silvery hair. There is a short dépression on either side of the 

 apex of the clypeus making it appear almost trituberculale. Pro- 

 thorax smooth. Post-scutellum not striated, a stout keel down its 

 centre. The 3 r '' antennal joint is almost as long as the following 

 2 united. Tarsal spines black ; there is a dense line of pale golden 

 pubescence on the basai half of metatarsus. The pubescence is 

 dense, giving the insect a greyish appearance. The eyes converge 

 very slightly above ; the ocelli are in an equilateral triangle, and 

 the hinder are separated from the eyes by a little greater distance 

 than they are from each other. 



Trypoxylon marginifrons sp. n. — Black, covered with 

 silvery pubescence, the pile on the apical abdominal segments 

 tinged with fulvous, the mandibles rufo-testaceous, the teeth black; 

 wings hyaline, the basai abscissa of the radius straight, oblique, 

 the apical more than twice its length, roundly curved. Front at the 

 antennse margined by a wide keel, dilated in the middle. Metanotal 

 furrow wide, and at the base shallow, of equal width, the apical 

 part with the sides sloping obliquely and with a furrow in the 

 centre; the basai part is bordered by a narrower oblique furrow; 

 except the part outside this furrow the metanotum is striated. A 

 smooth line (it can hardly be called a furrow) widened below, runs 

 from the ocelli to near the antennal transversé keel. Apex of 

 clypeus broadly rounded. Mesonotum shining, distinctly, not very 

 closely, punctured ; a narrow furrow on either side of its middle. 

 Apex of pronotum roundly raised, trilobate, the central lobe small 

 and more like a tubercle than the latéral. $. 



Length 12 mill. 



Congo da Lemba, April (R. Mayné). 



The apex of the cubitus is thicked and rounded. Tarsal spines 

 pale. The pubescence on the plurse long and dense. The abdomen 

 is rather short, the basai 4 segments united being not much longer 

 than the head and thorax united; the l 3t segment is distinctly, the 



