ETHIOPIAN FRUIT- FLIES OF THE GENUS DACUS. 99 



Head entirely rufous, without any dark spot on frons, orbits or occiput, only the 

 ocellar dot blackish ; face yellow, with two very striking, shining black, rounded 

 spots ; a less distinct dark spot below the eye ; the swollen lower portion of the 

 occiput yellow ; antennae, palpi and proboscis entirely yellow ; all the bristles black, 

 three pairs of orbitals present. Thorax and pleurae entirely rufous, whitish on the 

 back, with three less distinct longitudinal stripes ; humeral calh yellow ; a broad 

 mesopleural stripe, continued above only to the sutural callus and below with a small 

 spot on the sternopleura ; a single rounded hypopleural spot. Scutellum yellow, 

 with the extreme base rufous ; mesophragma rufous ; halteres whitish. All the 

 bristles are black ; the external scapulars are strong, but the internal are wanting. 

 Abdomen rather elongate, not at all sphaeroidal, entirely rufous, with a faint trace of 

 a middle dark stripe and of two spots on the sides of the third segment ; venter 

 yellowish ; ovipositor short, red, the basal joint conical, swollen ; middle segments 

 partly fused. Legs entirely yellow, only the four posterior tibiae at base and the 

 last tarsal joints a little darkened. Wings hyahne, with only the stigma, the marginal 

 cell and a small border along the costa in the submarginal cell, dark brown ; this 

 border is dilated into a brown spot at the end of third vein ; terminal portion of 

 fourth vein straight. 



Type $, a single specimen from N.W. Khodesia, Chilanga, 19. ix. 1913, on wild 

 fig tree {R. C. Wood). 



15. Dacus longistylus, Wiedemann, 1830. 



The present species is the type of the genus Leptoxyda, because L. testacea, Macquart, 

 of which I have seen specimens taken at Thies, Senegal, by Prof. Silvestri, is the same 

 as Wiedemann's species ; Surcouf has also figured the species from Senegal in Insecta, 

 1911, p. 269. 



This species has entirely yellow humeral caUi and two contiguous hypopleural 

 spots ; the middle scapular bristles are wanting ; the abdominal segments are 

 fused ; the first segment of the ovipositor is very long, almost longer than the 

 abdomen. 



The species is always to be found on the plant Calotropis procera, like Dacus kingi, 

 Froggatt {Proc. of the Linn. Soc. of N.S. Wales, xxxv, 1910, p. 866), from Khartoum, 

 which has been bred from the fruits of the same plant and is undoubtedly a 

 synonym. I have seen the species also from Kassala and from Erythraea (Keren 

 and Sabarguma) ; the specimens from Assuan, Egypt, which I have received from 

 Becker are almost one-half smaller than the others, but I cannot perceive other 

 differences. The species occurs also in South India, probably imported from Africa. 



16. Dacus brevis, Coquillett, 1901, (fig. 13). 



Fig. 13. Dacus hrecis, Bezzi, Coq. 



