434 JOURNAL, BOMBA Y NATURAL HISTORY SOCIETY, Vol. XIV. 



there is a fusoous cloud between the base of the stigma and the transverse 

 basal nervure and extending to the opposite side of the wing ; a cloud 

 at the apex of the stigma extending to shortly beyond the middle of 

 the cubital cellule ; the apex of the wing to near the second transverse 

 cubital nervure and on the lower side extended backwards to beyond 

 the middle of the second cubital cellule. The apex of the hinder wing 

 and its lower side to the middle where it projects obliquely upwards 

 along the cubital nervure, smoky. Legs luteous ; the apices of the 

 tarsi blackish. Abdomen luteous, more or less suffused with black; 

 the basal three segments irregularly longitudinally striated, the strise 

 in places forming reticulations ; the three transverse furrows are 

 deep and closely, stoutly, longitudinally striated ; there is no keel on 

 the second segment ; the smooth basal plate is small, indistinct and 

 triangular. 



The $ is similar ; the clouds in the wings are more suffused ; the 

 apex of the abdomen is black ; the antennae are longer than the 

 body. 



DiTHERUS, gen. nov. 



Eyes hairy. Wings with three cubital cellules ; the apical abscissa 

 of the radius faint and curved upwards at the base ; the base of the 

 cubitus and the upper part of the recurrent nervure are interrupted, 

 80 that the first cubital, the first discoidal and first posterior cellules 

 are not separated completely ; the recurrent nervure is received in the 

 first cubital cellule and at a distance from the first transverse cubital 

 nervure ; the transverse median discoidal is received shortly behind the 

 middle of the first discoidal cellule ; the second discoidal cellule is open 

 at the apex. Face with a sharp keel down the middle, the clypeua 

 is separated from the face, its apex rounded. The mandibles end in a 

 long sharp tooth. Occiput not distinctly margined ; broadly, roundly 

 incised. Parapsidal furrows distinct, deep. Scutellum rounded, not 

 raised above the mesonotum. Median segment areolated. Legs stout, 

 the hinder coxse large ; the metatarsus large ; thickened. 



The head is well-developed behind the eyes, the part between them 

 and the ocelli is depressed ; the parapsidal furrows are deep ; the 

 petiole is broad at the base, becoming gradually wider towards the 

 apex ; there is a distinct suturiform articulation ; the cubitus origi- 

 nates from shortly above the middle of the transverse basal nervure, the 

 first discoidal cellule being thus smaller than usual and not so much 



