312 PERCY SLADEN TRUST EXPEDITION 



lower row has four bristles, the basal ones being the longer, and also extends all along 

 the femur. Middle tibiae with the terminal crown reduced to one long bristle inside. 

 Hind femora with one or two fine terminal bristles outside, tibise with one very short 

 stout spine at the end. 



The coxal and sterno-pleural hair bunches are sparser and shorter than in the last 

 species. 



Abdomen. Yellow ; surface bristly ; marginal bristles present ; segments of nearly- 

 equal length. 



Size about 3 mm. 



Localities. Seychelles. Mahd : near Morne Blanc, X. 1908. Silhouette: near Mt. 

 Pot-a-eau, about 1500 ft., VIII. 1908. 



11. Sapromyza crassicaput, n. sp. 



A single specimen was collected of this species, which is at once distinguished by 

 its unusually large head. It has two brown-black spots on the fourth abdominal segment; 

 except for this and the somewhat infuscate front legs, it is entirely yellow. 



$. Head (PI. 15, fig. 12). The frons is a slightly duller but brighter yellow than 

 the rest of the insect : ocelli reddish. Back of head with regular bristles recalling the 

 post-ocular bristles of the Dolichopidce ; cheeks bristly. 



Palpi yellow and hairy. The usual two fronto-orbital bristles present, inner and 

 outer verticals, post-verticals somewhat below the vertical margin towards the back of 

 the head and crossed, ocellars more delicate. 



Antennae all yellow including the basal joints of the arista, third joint fairly long, 

 aristal flagellum black and slightly pubescent. 



Thorax. Three dorso-centrals ; the arrangement of the achrosticals is rather difiicult 

 to observe as the dorsum is depressed by the pin, they appear to be irregularly six -rowed. 

 Other bristles normal. 



Wings normal, glassy with yellow veins. 



Halters yellow. 



Legs yellow except that the front pair are slightly infuscate, especially on the 

 tibise and tarsi, and that the middle tarsi are the same. Front femora with the usual 

 row of backwardly -directed bristles above and a row beneath. 



Abdomen. Finely haired; marginal bristles on all but the middle part of the 

 segments. A large black spot on each side of the fourth segment occupying nearly the 

 whole breadth. 



Size, excluding the antennae, 3f mm. 



Locality. Seychelles. Mahe: Cascade Estate, 800 ft. or more. 



12. Sapromyza j)erj)wictata, n. sp. 



A single specimen was collected belonging to the group with pictured wings. 



Head (PI. 15, fig. 13). Vertex and frons brown, yellow above the antennse. The 

 ocelli on a distinct tubercle, fronto-orbital bristles on small black spots. Face brown. 



