On the Bombi/liid Fauna of South Africa (Diptera). 71 



SUBFAMILY CYTHEREINAE. 



ONIROMYIA, gen. iiov. 



Au aberrant genus, apparently allied to Amictus on account of the 

 narrow and short wings with similar venation, but distinct by the 

 different antennae, absent ocelli, absent abdominal macrochaetae and 

 haired metapleurae. Owing to the shape of the occiput the genus 

 must be placed in the Cytherehiae, notwithstanding the approximate 

 antennae ; the form of these organs agrees with that of Perin- 

 (jufijinijia, from which it is differentiated by the narrow elongate body 

 with conical abdomen and by the very different venation. 



Head of female (the male being still unknown) a little broader than 

 the thorax ; frons broad, broader than one third of the head, with 

 parallel sides and long hairs ; occiput flat, not bilobed above, briefly 

 pilose, without ocular fringe ; no ocelli and no ocellar tubercle ; there 

 is instead a depression in the form of a shallow furrow. Eyes bare, 

 Avith entire hind border. Face very short, not prominent, bare, but 

 concealed below the long hairs of the base of the antennae ; genae and 

 chin rather broad, haired. Antennae inserted near the mouth border, 

 but at the level of the middle of the eyes, approximate at the base ; 

 first joint thickened, with a prominent tubercle below, bare above, 

 densely clothed with a tuft of exceedingly long and soft hairs under- 

 neath ; second joint small, short, globular; third joint small, once and 

 a half as long- as the two basal joints taken together, ovate at base, 

 narrow and styliform for more than the terminal half, this narrowed 

 part being provided with rather long hairs chiefly on the under side 

 and ending with a thin but rather long style. Proboscis horizontal, 

 longer than the head and thorax together ; mouth-opening small, sub- 

 quadrate ; palpi rather short, with long hairs at end. Thorax short, 

 subquadrate, with not very strong praesutural and supra-alar bristles ; 

 metapleural tuft long and dense, fan- shaped. Scutellum with bristly 

 hail's only at the hind border ; squamae less developed, briefly hairy 

 on the border ; mesophragma on the sides with a membranous tubercle 

 as in Systropus. Abdomen very long, conical, acute at end, destitute 

 of macrochaetae at the hind border of the segments ; female genitalia 

 with a yellow bladder above, and destitute seemingly of a terminal 

 circlet of spines. Legs stout and short ; the hind femora only with a 

 few spines below at apex ; all the tibiae with numerous and long 

 spicules and with numerous spurs at end ; pulvilli well developed. 



