308 PERCY SLADEN TRUST EXPEDITION 



black with extreme tip yellowish ; tarsi all black, the last joint with long hairs on the 

 dorsal surface. Middle : all yellow with a crown of two spines on the end of the tibia. 

 Hind : yellow. 



Abdomen. Shining yellow brown to blackish with a few scattered hairs ; the hind 

 margin of the segments with a row of very long bristles, especially well developed on the 

 third and fourth segments, these marginal bristles extend over the sides. The terminal 

 segments of the $ form a distinct hypopygium of rounded outline, a ventral view of which 

 is given in PL 15, fig. 5 ; the last segment has a pair of projecting processes with a fine 

 horny process between. Sixth segment with two black dots. 



$. The female is similar to the male but has a somewhat pointed abdomen. 



Size, excluding antennae, 4 mm. 



Localities. Seychelles. Silhouette : near Mt. Pot-k-eau, about 1500 ft., VIII. 1908 ; 

 Mare aux Cochons, IX. 1908. Mah^ : Long Island, VII. 1908 ; marshes on coastal plain, 

 Anse aux Pins and Anse Royale, I. 1909 ; from grass in cultivated country, about 1000 ft., 

 XII. 1908 ; near Morne Blanc, 800 ft., XL 1908 ; Cascade Estate, ca. 1000 ft., 1908—9. 



6. Pachycerina obscuripennis, n. sp. 



In general form and characters this species is much like the last, it is, however, a very 

 dark suffused form. The differences are given below. 



<?. Head. The ©cellar spot is elliptical in outline, extending over the vertex with the 

 hind pair of ocelli standing on its minor axis. The grey line joining the vertex to the 

 upper fronto-orbital bristle is more evident and broader. Antennae : first and second joints 

 dark brown, the second with more hairs, arista more densely haired. 



Thorax. Dorsum all black brown, the colour extending right up to the scutellum, 

 with a fine yellow line between the achrostical bristles and a yellow border extending from 

 the humeri to round the edge of the scutellum. 



Wings suffused with black, darkening towards the costa. 



Halters black. 



Legs, front femora yellow with a black tip. 



Abdomen. All shining black with appendages like those of the former species. 



Size as last species. 



Locality. Seychelles. Silhouette: forest above Mare aux Cochons, IX. 1908. 



Sapromyza, Fallen. 

 Sapromyza Fallen, Dipt. Suec, Ortal., (1820), p. 29. 



Sub-gen. Sapromyza, sens. str. 



7. Sapromyza striata, n. sp. 



This species has the general appearance and the long plumose antennae of the 

 sub-genus Minettia, but it has only one intra-alar bristle visible. 



