118 Annals of the SontJi African Museum. 



nervure is received beyond the transverse basal. First joint of 

 flagellum distinctly longer than the second. The disco-cubital 

 nervure is thickened shortly behind the middle, almost broken ; the 

 recurrent nervure is interstitial ; the transverse median nervure in 

 hind wings is broken below the middle ; the issuing nervure is faint. 

 Allied to G. rufescens, Tosq. 



XANTHEPHIALTES, gen. nov. 



Second abdominal segment twice longer than wide, the third 

 slightly longer than wide, the others wider than long ; the thii-d 

 to fifth segments with two large oval raised tubercles behind tiie 

 middle ; there are two indistinct ones on the second. Areolet large, 

 wide, the transverse cubital nervures meet in front ; they are 

 curved, the basal longer than the apical. Disco-cubital nervure 

 unbroken. Transverse median nervure in hind wings broken 

 almost in the middle. Claws with a stout tooth at the base ; the 

 last joint of hind tarsi fully four times longer than the preceding. 

 Median segment smooth ; the spiracles oval, of moderate size. 



The temples are straight, the occiput transverse. Mandibles 

 unequally toothed, the upper tooth turned inwardly. Malar space 

 short, but distinct. Colour yellow ; the wings black and yellow. 

 Parapsidal furrows absent. Scutellum flat, longer than wide. 



The relationship of this genus appears to be close to Ephialtes ; 

 that genus has the abdomen much longer, all the segments, except 

 the apical, being much longer than wide ; the transverse median 

 nervure in hind wings is broken distinctively above the middle, the 

 median segment is not smooth, the wings hyaline and the parapsidal 

 furrows are distinct at the base. 



This genus is founded on Ephialtes ocidakis, B6., Hym6n., iv., 81; 

 Tosquinet, Mem, Soc. Ent. Belg., v., 278; which is in the 

 collection from Cape Colony, King William's Town Distr. St. 

 Mathew's. (A. Lightfoot.) 



LISSONATA, Grav. 

 The species may be separated by means of the following table : — 



1 (11). Abdomen rufous. 



2 (3). Thorax rufous, only black at the base and apex of 



mesonotum ; head black, not marked with yellow, the 



apex of abdomen black fulvlpalpis. 



3 (2). Thorax black, marked with yellow; the head black, 



maculate with yellow ; apex of abdomen not black. 



