SJOSTEDTS KIL1MANDJAEO MERU EXPEDITION. 8: 6. 



Beloiiogaster sex-maculatus sp. uov. 



Black, densely covered with a silvery pile; the lower part of the front, including 

 the lower part of the eye incision, face, clypeus, mandibles, a large irregularly rounded 

 spot on the apex of the 2nd abdominal segment, a smaller transverse stripe, twice wider 

 than long (counting transversely), on the 3rd, and a similar one, but hardly one fourth 

 of its size, on the 4th, pale yellow; the upper part of the front, vertex, occiput, outer 

 orbits, the sides of mesonotum, scutellums, the greater part of mesopleurre, the sides 

 of sternum, the greater part of metapleura\ the apex of metanotum, the 1st abdo- 

 minal segment and the 2nd, except the black spots, rufo-ferruginous; the meso- 

 sternum reddish, largely tinged with yellow. There is a rufous stripe down the 

 centre of the face and clypeus. Antenna} rufo-testaceous, the scape yellow below. 

 Legs black, the 4 anterior coxa 3 , trochanters and femora pale yellow below, tinged 

 with dark red above. Wings hyaline, the costal cellule tinged with fulvous towards 

 the apex, the costa, stigma and basal nervures rufo-testaceous, the apical nervures black; 

 the 2nd cubital cellule much narrowed in front, the 2nd abscissa of the radius being 

 about one eighth of the length of the 3rd ; the 3rd transverse cubital nervure is straight 

 in front, the rest is roundly curved outwardly; the 2nd transverse cubital nervure is re- 

 ceived at the base of the apical third of the cellule - - at twice the length of the 2nd 

 abscissa of the radius. Apex of clypeus broadly roundly curved ; the malar space is short, 

 about twice the length of the pedicle of the antennae, tf. 



Length 20 mm. 



Kilimandjaro: Kibonoto, cultivated zone, May. 



The 3rd joint of the antennte is a little less in length than the following 2 united, 

 the 4th and 5th are equal in length, the 5th a little shorter; the 8th joint has the basal 

 three fourths roundly dilated, the apex obliquely narrowed, the 9th and 10th have the 

 basal half dilated, the apex roundly obliquely narrowed, the llth becomes gradually 

 roundly widened towards the apex, which is rounded; it is very slightly longer than the 

 12th, which is of equal width. Face and clypeus covered with short silvery pubescence; 

 the thorax and legs densely with longer blackish pubescence. Abdominal petiole as long 

 as the head and thorax united, not much narrowed towards the apex; the basal third 

 of the 2nd segment is cylindrical, narrowed, the rest becomes gradually widened towards 

 the apex. 



Allied to B. gracilis, from which it may be known by the 3rd and 4th abdominal 

 segments bearing yellow spots, by the stouter antennse, with the apical joints more stoutly 

 dilated and, e. g. by the difference in the form of the prenultimate joint: in gracilis it 

 is gradually dilated from the base and apex towards the middle, in 6-mandatns it be- 

 comes gradually widened from the base to the apex. Both species have the abdomen 

 slender and the 2nd segment has a long narrow basal petiole. 



