■98 PROF. M. BEZZI. 



10. Tridacus puncfatifrons, Kaisch, 1887. 



This species, described originally from Loanda and recorded from Kilimanjaro 

 by Dr. Speiser, is the smallest of its group, not surpassing 8 mm. in length ; it is 

 easily distinguished by the two contiguous hypopleural spots, the shaded small 

 cross- vein and the blackish fore border of the wings ; anterior supra-alar and scapular 

 bristles long and strong. It shows a great resemblance to Dacus vertebratus, Bezzi. 

 Third abdominal segment in the male ciliated ; facial spots large and rounded. 



There are in the collection some specimens from the Gold Coast, Aburi, xii.1913 

 {W. H. Patterson) ; from Uganda, Kerinya, Jinja, i.l911, on herbage {Dr. G. D. H. 

 Carpenter) ; from Nyasaland, Mt. Mlanje, 31. xi. 1913 (S. A. Neave) ; from Zanzibar, 

 1913 (Dr. W. M. Aders). 



Subgenus, Dacus, s. str. ( + -Leptoxyda). 



11. Dacus immaculatus, Coquillett, 1901. 



A yerj distinct species, the wing pattern of which has been figured in Froggatt's 

 Heport, 1909, pi. iii, fig. 9 ; it was originally described from East London, Cape 

 Colony. The humeral calli are entirely yellow ; the mesopleural stripe is broad 

 and continued along the suture ; the two hypopleural spots are of medium size and 

 contiguous. Ovipositor very short, with the basal joint flattened. 



A single female specimen from Natal, Estcourt, 19. ii. 1913 (R. C. Wroiighton). 



12. Dacus inornatus, Bezzi, 1909. 



I described this characteristic species in 1908 as modestus (not of Fabricius !) from 

 Congo, Semlia Falls, N'Gami River ; and subsequently I received a female specimen 

 of it from the Belgian Congo, Kitobolu {Dr. G. Rovere). 



The undescribed female is very like the male, but has the abdomen entirely black, 

 without the narrow yellow border ; the ovipositor is short, with the first joint swollen 

 and of conical shape, entirely black. Face wholly shining black ; frons shining 

 l)lack, with a dark brown band in the middle ; occiput shining black ; humeral 

 calli entirely whitish ; mesopleural stripe broad, but not continued to the suture ; 

 a single rounded hypopleural spot. The entire body is black, except the whitish 

 markings on thorax and the scutellum ; the wings are immaculate ; the small cross- 

 vein is lightly shaded with fuscous ; the terminal portion of fourth vein almost 

 straight. 



13. Dacus Oleae, Gmehn, 1788. 



Of this Mediterranean species I have seen South African specimens collected in 

 the Cape Colony by Lounsbury, and communicated by Prof. Silvestri and Prof. 

 Berlese. They are identical with the Italian ones, as already stated by Prof. Silvestri 

 in his Report, 1913, p. 85. 



14. Dacus rufus, sp. nov. 



A pretty species, characterised by the rufus coloration of the entire body, the 

 yellow humeral calli, the single hypopleural spot, and the absence of the anal stripe 

 on the wings. 



o. Length of body, 7 mm. ; length of wing, 6-5 mm. ; breadth of wing, 2-1 mm. 



