30 PROF. M. BEZZI. 



2(1). Black wing pattern not radiating, the hyaline apical spots being smaller 

 (Pliomelaena, subgen. nov.) ; stigma with a yellowish or hyaline spot at 

 base ; axillary and third posterior cell infuscated, with hyaline spots. 



3(4). Halteres whitish ; frons as broad as or broader than the eye ; first posterior 

 cell with 2 hyaline dots, besides the apical hyaline spot . . brevifrons, sp. n. 



4(3). Halteres with blackish knob ; frons narrower than the eye ; first posterior 

 cell with a single hyaline spot . . . . . . . . strictifrons, sp. n. 



1. Euaresta planifrons, Loew, Berl. Ent. Zeits., v, 1861, p. 277, pi. ii, fig. 13. 

 A true Euaresta, very like the Mediterranean pulchra, Loew. 

 Described from Caffraria, and not recorded subsequently. 



I have seen a male specimen from Grahamstown (Miss M. Daly and Miss M. Sole), 

 June 1903, which differs only in having the base of the 3rd posterior cell entirely 

 black, thus only the axillary cell is hyaline. 



Subgenus Pliomelaena, nov. 



2. Euaresta (Pliomelaena) brevifrons, sp. nov. (PI. i, fig. 8). 



A species very much a like true Euribia, but with more sparse hyaline spots on 

 the wings, the black pattern being prevalent. 



<J $. Length of the body, 4-4"5 mm. ; of the ovipositor, 1 mm. ; of the wing, 4-4 - 5 

 mm. 



Head yellowish, unspotted, with only a darkish central area on the middle of the 

 occiput ; frons opaque, about as broad as long ; face short, with rather prominent 

 mouth-border ; cheeks linear ; jowls narrow. Antennae entirely yellowish, about 

 as long as the face ; third joint obtuse at end, as long as the first two joints together, 

 with a bare arista ; palpi and proboscis yellowish, the latter being short and not 

 geniculate. Cephalic bristles long and stout ; pvt. and vt. yellowish, like those 

 of the occipital row, which are typical ; oc. and or. dark yellowish or blackish ; 

 3 lower or. Thorax black, but clothed with dense grey dust, so that the ground 

 colour is invisible ; pleural sutures slightly reddish ; the back is clothed with }'ellowish 

 pubescence. Chaetotaxy complete ; bristles dark" yellowish or blackish, those 

 of the back being inserted on small black dots ; no distinct scp. ; 2 mpl., the lower 

 one being smaller ; st. and pt. stout. Scutellum large, triangular, flat, black and 

 grey-dusted on the disc, reddish at border and below, with 4 equally long yellowish 

 bristles, inserted on small black dots, those of the apical pair being crossed. Meso- 

 phragma black, with dense greyish dust. Halteres whitish. Abdomen shining black, 

 with short yellowish pubescence, and dark yellowish or blackish bristles ; ovipositor 

 flat, shining black, elongate, acute. Male genitalia black, rounded, prominent. 

 Legs entirely pale yellowish ; front femora with yellow bristles beneath ; hind tibiae 

 with an indistinct hind row, more distinct near the middle in the female. Wings 

 elongate with distinct costal bristle ; third longitudinal vein bare ; second vein 

 slightly divergent, third and fourth parallel ; the two cross-veins are straight, per- 

 pendicular and parallel ; lower angle of the anal cell acute but not produced. The 

 base is hyaline up to the basal and anal cross-veins, but with a brown spot in the 

 middle of the second costal cell at fore border ; stigma elongate, with a hyaline 



