70 M. BEZZI. 



In my Key the present species falls into section 27 (p. 90) together with oleae, 

 which also occurs in Erythraea,* but has no real affinity with it. 



^ $. Length of body, 5*5-6 '5 mm. ; length of wing, 5-6 mm. 



Occiput black, rather shining, with narrow yellowish orbits, which are broadened 

 below ; ocellar spot shining black ; frons opaque, with the basal half reddish 

 brown and the apical half pale yellowish, but with three distinct pairs of broad 

 blackish dots on the sides ; lunula shining red or brownish ; face pale yellowish, 

 shining, the black spots being more stripe-like and placed on the inner border of 

 the antennal grooves near the mouth-border ; peristomial spot less darkened, 

 but distinct. Antennae reddish, with the first joint short and the third infuscated 

 at the end ; palpi pale yellowish ; proboscis reddish. Cephalic bristles black ; 

 two pairs of strong and distant lower fronto-orbitals. Thorax entirely black, even 

 on the pleurae, or only with a reddish stripe near the prothoracic stigma. Yellow 

 markings as follows : humeral calli entirely, but with a black border above and 

 in front ; a narrow, triangular and short sutural stripe on each side ; a rather 

 narrow mesopleural stripe, ending with a very small and less distinct sternopleural 

 spot ; a single hypopleural spot, which is broadly margined with black below. 

 Scutellum bright yellow, with a basal black band, which is much broader than 



Fig. 6. Dacus erythraeus, Bezzi, sp. n. 



in all the preceding species. Mesophragma entirely black. The back of the thorax 

 is punctate and clothed with short whitish pubescence. The bristles are black ; 

 no anterior supra- alars ; scapulars short, the middle ones not distinct ; ptero- 

 pleurals well developed ; two scutellar bristles. Halteres whitish. Abdomen 

 elongate in the male, more rounded in the female, convex, punctate, with whitish 

 pubescence, which on the sides is rather long. It is black ; the second segment 

 has a rather broad, pale yellowish, transverse band at the hind border, which is 

 broadly interrupted in the middle ; fourth and fifth broadly reddish in the middle, 

 forming a triangular patch with the base behind and provided with a middle 

 longitudinal black line, which does not reach the hind border of the last segment. 

 Venter yellowish, irregularly blackened towards the middle. Male with non-ciliated 

 third abdominal segment and with shining red genitalia. Ovipositor short, as 

 long as the last abdominal segment, but not prominent, reddish, with the basal 

 segment rather inflated but not conical. Middle segments of the abdomen in both 



* F. Silvestri. Viaggio in Eritrea per cercare parassiti della mosca delle olive (Boll, 

 del Labor, di Zool. gen. e agr., Portici, 1914, ix, pp. 186-226, 24 figs.). 



F. Silvestri. Contributo alia conoscenza degli insetti dell' olivo dell' Eritrea e dell' Africa 

 meridionale (I.e., 1915, ix, pp. 240-334, 78 figs.). 



