South African Higher Myoclarii (D,'/*/i'/v/ Calyptrutae'). 495 



2 rows of robust, erect setae, one of which, situated at the back of the 

 external row, is longer and turning outwards, and parallel with the 

 outer vertical seta. Two ocellary setae directed outwards and slightly 

 in front. On the genae the 3 rows of the above-mentioned fronto- 

 orbital setae descend couvergingly above the antenual chaeta as far as 

 the upper third of the epistome. At the end follow 2-3 small setae 

 situated near the eye, erect or slightly bending forwards. The epistome 

 is somewhat reclining and the buccal border projects as in Hasistylum 

 B B. ; on the facial ridges is a row of well-developed and moderately 

 even vibrissae ascending as far as the end of the fronto-orbitary setae. 

 The inferior vibrissae reach the edge of the buccal border. The 

 peristome is as wide as one-quarter of the height of the eye. Antennae 

 a little shorter than the epistome ; 3rd joint about 4 times the length 

 of the 2nd ; chaeta no longer than the antennae and thickening until 

 its terminal third ; 2nd joint distinct, but short. The pipette is 

 moderately long, thin and deflexed ; palps well developed, thickening 

 towards the apex. The 3 differs from the $ in having a single, long, 

 orbital seta directed forwards. On the thorax the acrostical setae are 

 complete ; 4 dorso-ceutral setae behind the suture ; sternopleural setae 

 = 2 + 1. On the scutellum are 2 rows of rigid setae, and on each 

 side 4 marginal, the apical ones of which are crossed and half upturned. 

 Abdomen : segment 1 wholly excavated, with 2 median marginal setae ; 

 the same on segment 2 ; segment 3 with a complete row ; segments 2 

 and 3 with uneven irregularly set setae ; segment 4 covered with setae. 

 Hypopygium of $ retracted. Wings with the 1st hind cell closed or 

 shortly petiolate, sometimes semi-open, cubitus of 4th nervure straight 

 with an umbrate prolongation caused by a dark reflection visible only 

 in certain light ; 3rd nervure ciliate at base as far as the small trans- 

 verse, or nearly so ; no costal spine. Legs robust ; anterior claws and 

 pulvilli of $ minute. 



MYXARCHICLOPS CAFFER, n. sp. 



A small ashy grey species with whitish sheen on the genae and 

 peristome ; orbits slightly flavescent, a little wider than the black 

 frontal baud ; epistome dark testaceous like the basal part of the 

 antennae, the 3rd joint of which is brownish. Palps yellow, buccal 

 border rufescent. Abdomen : 1st segment black, the others with an 

 ill-defined posterior black baud. Wings greyish, pale at the base, 

 uervures fuscous ; posterior transverse slightly flexuose, modei-ately 

 distant from the cubitus. Squamae whitish ; halteres yellowish with 

 the club fuscous. Legs black, posterior tibiae with somewhat uneven 

 setae, especially in the $ . 



