82 Annals of the South African Museum. 



entirely black, in the male with dark hairs on the coxae and on the 

 under side of the femora, with whitish ones in the female ; hind tibiae 

 scarcely ciliated on the outer side ; claws black, with yellow base ; 

 pulvilli yellowish. Wings whitish hyaline, with yellow veins, and 

 with the typical venation of Corsomyza, but the anal cell closed 

 at the hind border itself or rarely very briefly stalked ; the axillary 

 lobe is also distinctly broader. There is no trace of the ci-oss-vein 

 forming the third submarginal cell in Callynthrophora 



GNUMYIA, gen. uov. 



I have to create here this new genus for a form which unites the 

 characters of Corsomyza with those of Callyntliropliora ; the antennae 

 and their position are more like those of the former, while the shape 

 of head approximates more to that of the latter ; there ai'e, moreover, 

 3 submargiual cells on the wings ; but it differs from both the genera 

 in the linear third antennal joint, and from all the other genera of 

 Usiinae in having a short proboscis, which is more like that of a 

 Muscid than that of a Bombyliid ; the facial brush (in the female) 

 is indicated only by some denser lateral hairs. Head very broad and 

 inflated, distinctly broader than the thorax. Occiput a little concave, 

 not bilobate above; vertex rounded, distinctly lower than the eyes; 

 there is no distinct occipital fringe. Ocelli disposed in equilateral 

 triangle on a broad, rounded protuberance. Frons convex, very 

 broadened forwardly and passing gradually to the veiy broad and 

 convex cheeks and to the convex face ; the breadth of the f rons at the 

 level of the antennae is three times as broad as that at the vertex, and 

 that of middle of face is more than four times such. The face is 

 separated from the cheeks by a deep furrow, which becomes deeper 

 below and is directed towards the eyes ; there the furrow makes a 

 bend and is directed towards the mouth, separating thus the very 

 broad but short cheeks. The face is densely pubescent, but the hairs 

 are not disposed to form a distinct brush. Eyes bare, proportionally 

 narrow, much narrower than high ; in profile they are not broader 

 than the prominence of the face and of the cheeks before them. 

 Antennae inserted much above, near the level of the upper border of 

 the eyes ; they are broadly separated at base, the distance between 

 them being as broad as that between the 2 basal ocelli ; first joint 

 rather swollen, but of an elongate cylindrical shape; second joint 

 globular and setose ; third joint very elongate, equal throughout its 

 whole length, almost linear, more than twice as loug as the two first 

 joints together ; it ends in a short, acute point, without a distinct 

 style. The mouth-opening is proportionally small ; the proboscis is 



