391 



has the abdominal segments shorter comparée! with the width and, 

 more particularly, the l st , which, in D. rufus Cam. çf, is twice 

 longer than wide, the 2 :ul is also longer than wide, while in 

 D. ruficollis it is wider than long ; the latter, however, has the large 

 fuscous wings with the nervellus in hind wings broken in the 

 middle, the rufous colouration, but not so extended and the small 

 round metathoracic spiracles and the semicircular emargination 

 on the clype.us. 



Lissonata leucostoma sp. h. — Black, the thorax red, 

 the sterna black, the black extending on to the pleurse, that on the 

 mesopleurœ roundly dilated on the basai half, that on the meta- 

 pleurse broadly dilated on the apical half; the clypeus except 

 above, mandibles except at apex, palpi, the l st segment of abdomen 

 to near the middle, about the basai third of the 2 nd , more than the 

 basai half of the 3 rd , about the basai fourth of the 4 th , the line roun- 

 ded at the apex, and the basai 4 ventral segments, white; antennee 

 black, the apical joints fuscous below, the under side of the scape 

 and joints 12-14 white; four front legs white, the femora tinged 

 with fuscous; the hinder black, the apex of coxœ, apex of basai 

 joint of trochanters, basai fourth of hind tibiae, 2 nd joint of hind 

 tarsi and the 3 rd to near the middle, white; the apex of hind spurs 

 fuscous; wings clear hyaline, the apex froin near the middle of the 

 apical abscissa of radius dark fuscous, paler at the extrême apex; 

 the nervures and stigma black; nervellus shortly postfurcal ; the 

 areolet with the pedicle half the length of the transverse cubital 

 nervures; the L 8t of the latter is straight, oblique, the 2" d roundly 

 curved; the récurrent is received at the apex of the areolet. cf. 



Length 8 mi 11. 



Congo de Lemba, April (R. Mayné). 



Front and vertex smooth, the former with 2 large foveae or 

 dépressions, ronnded above ; the face distinctly, but not very closely 

 punctured more closely on the sides than in the middle. Thorax 

 some what strongly punctured, the metanotum more closely and 

 strongly than the rest, and more densely covered with white 

 pubescence; the apex of the scutellum and the centre of the meso- 

 pleurae smooth. Pubescence dense and white. Hind tibise spinose. 



Theronia nigrinervis sp. n. — Luteous, the middle of the 

 front and vertex and the 3 rd and following segments of the abdomen 

 tinged distinctly with orange; antennal scape yellow, black above, 

 with 2 yellow, longish triangular marks on the sides, the basai the 



