486 Annals of the South African Museum. 



front, descend irregularly to the level of the antennal chaeta ; on each 

 side are 1 long, ascending frontal, and 1 similar inner vertical ; the 

 pair of ocellary setae, thrusting forwards, have the same development 

 as the others. The thorax bears 4 dc. ; st. = 2 + 1. On the entirely 

 black scutellum are discal erect setae and 3 long marginal on each 

 side, the apical are crossed and slightly bending upwards ; in addition 

 there is a pair of long and slender, closely set setae between the 1st 

 and 2nd marginal. Abdomen with marginal and discal setae ; with 

 the latter are intermixed numerous shorter and weaker ones. Wings 

 greyish, darkened towards the base. Cubitus of 4th nervure obtuse ; 

 apical transverse oblique and almost straight ; posterior transverse, 

 S-shape, remote from the angle; 1st posterior cell of the wing narrowly 

 open next to the apex of the wing ; 2 ciliae at the base of the 3rd 

 nervure ; costal spine absent. Squamae dirty yellow ; the upper small, 

 the lower broad ; halteres testaceous, the club dark. Legs black ; 

 anterior claws of $ moderately elongate. 



Length 7 mm. 



Natal, 1 $ , Durban (H. W. Bell-Marley), S. Afric. Museum. 



ZENLLLIA (PALES?) ILLITA, n. sp. 



The type is a 9,9 mm. long, the head white with a silvery sheen, 

 orbits somewhat ashy grey, flavescent behind, frons rather narrow (f- 

 the width from eye to vertex) with a broad blackish frontal band. 

 Thorax and scutellum ashy grey ; the former with 4 black lines, the 

 latter more or less rufesceut on the hind edge. 1st and 4th abdominal 

 segments wholly black, the last moderately shiny, segments 2 and 3 

 light ashy grey with dark sheen. Wings greyish, fuscous at the base 

 and towards the fore border, the nervures fuscous ; cubitus of 4th 

 nervure obtuse, nearly straight, blunt at apex ; the apical transverse 

 moderately arcuate, posterior transverse nearly straight. Squamae 

 dirty white, halteres dark, testaceous at base. Legs black. Antennae 

 black, moderately robust, a little shorter than the epistome, 3rd joint 

 barely reaching the length of the 2nd ; cheta very long, black, 

 thickened in the basal third, the second joint distinct, but short. 

 Palpi thick in their terminal half, black but with the apex more or less 

 rufescent. Peristome j- of the width of the eye. 



Chaetotaxy : 1 inner vertical ascending seta ; 3 slender ascending 

 frontal on each side ; 2 frontal setae below the insertion of the antennae 

 and little projecting beyond the middle of the 2nd joint ; vibrissae 

 weak, spaced, the superior reclining, not ascending beyond the 3rd 

 superior part of the facial ridges. Higher occiput without little black 



