248 PROF. M. BEZZI. 



acrostichal hairs disposed in many rows ; two strong sternopleurals ; mesopleurae 

 with 4-5 bristles at hind border, and with 2-3 at fore border. Scutellum, if viewed 

 from in front, clothed with greyish dust, and thus appearing somewhat different 

 in coloration from the back of the mesonotum ; it bears the usual four strong 

 bristles, and moreover 3-4 hairs on each side between the basal and the apical 

 macrochaetae, and a pair of apical and decussate hairs at the end. Postscutellum 

 and mesophragma shining black, the former as well as the upper half of the latter 

 being clothed with a faint greyish dust. Squamulae whitish, with yellowish border 

 and with pale cilia ; halteres black, with yellowish stalk. Abdomen of elongate- 

 oval shape, narrower than the thorax and likewise bluish black, not dusted ; it is 

 clothed with short black hairs, and on the sides and behind with short black bristles ; 

 last segment of the male 1| times as long as the previous one, obtuse and not 

 specially ciliate at the end ; male genitaha small and black ; ovipositor black, 

 with the penultimate segment dirty yellowish at the end. Venter black, black 

 pilose and with faint, dark grey dust. Legs rather short, quite black, even at base 

 of tarsi ; hairs and bristles black ; front femora with no special ciliation outside. 

 Wings hyaline, with slightly yellowish base, of typical form and venation ; all 

 the veins are pale yellowish. Second costal cell dilated outwardly and thus the 

 costa curved outside at base ; 3rd and 4th longitudinal veins parallel at the apex ; 

 6th vein long and reaching the hind border with its spurious end ; axillary lobe 

 much produced ; alula rather narrow and acute. Small cross- vein before the 

 middle of the discoidal cell. 



Type <$ and type $ in the British Museum from Gold Coast, Aburi, May 1911, 

 " bred from vegetable marrow " (L. Armstrong). Besides there are in my collection 

 the specimens from French Guinea, Conakry, bred by Prof. Silvestri from fruits of 

 Sarcocephalus escnkntus infested by the true fruit-fly, Ceratilis cosyra (=giffardi) ; 

 and others from Dahomey, Cotonou, likewise taken by Prof. Silvestri. 



• 

 Synonymical Note on the so-called " L. glaberrima, W;ed." or " L. aenea, Wied." 



As above stated, I have previously referred African specimens to the Brazilian 

 L. glaberrima. Owing to the bad state of preservation of these bred specimens, 

 which had almost entirely shrunk up in drying, it was not possible to discover any 

 difference between the African and the American species, which are very similar 

 in appearance. The only appreciable differences that I can now discover with 

 the good specimens at hand, are that the American species is more robust and 

 distinctly though slightly larger ; that it has the pleurae more bristly ; and chiefly 

 that the arista (fig. 4) is more shortly plumose, the breadth of the feathering being 

 about equal to the breadth of the third antennal joint. I think that this last 

 character alone indicates a specific difference, inasmuch as some minor characters 

 may be found in the venation. In the American species the discoidal cell is 

 distinctly longer, the hind cross-vein being placed nearer the hind border of the 

 wing, as can be seen from the fact that the last segment of the 4th longitudinal 

 vein is equal in length to the preceding one (while in plumosissima it is distinctly 

 longer) ; and that the cross-vein itself is twice as long as the portion of the 5th 

 longitudinal vein beyond it (while in ])himosissima it is only a little longer). 



