326 PERCY SLADEN TRUST EXPEDITION 



Philygria, Stenhammar. 

 Philygria Stenhammar, Ephydr., (1844), p. 238. 



28. Philygria striata, n. sp. 



A single specimen was captured which is superficially much like a small P. picta 

 Fall., with which the species is compared in the description. It has the same two silver 

 thoracic stripes and silvery eye- margins. 



The differences are as follows : 



Head. The third joint is much smaller, pointed, a little longer than broad, slightly 

 hairy at the top ; the aristal rays are much finer and less regular and pale instead of black; 

 the first two-fifths of the arista is very thick and then suddenly thins out for the 

 remainder. The mouth is less prominent ; the lower eye-margins are proportionately a 

 little wider. Two vertical bristles and the ocellars present but finer. 



Thorax. The silvery stripes are a little wider, and the dorsum of the scutellum is 

 the same colour as the disc of the thorax, not deep dull black : the silvery side spots to 

 the scutellum are present. 



Wings ; the second vein is longer and all the veins thinner and paler. 



Halters like picta with long whitish heads. 



Legs entirely pale yellow with no infuscation. 



Abdomen the same, but the anal half is not quite so shiny and the third segment 

 bears two small dusty spots. 



Size. 1 mm. 



Locality. Seychelles. Mahe : marshes on coastal plain, Anse aux Pins and Anse 

 Royale, I. 1909. 



29. Philygria sp. ? 



There are two imperfect specimens gummed on card which belong to the picta group. 

 It is impossible to give any description owing to the condition of the specimens. 



Locality. Seychelles. Mahe : marshes on coastal plain, Anse aux Pins and Anse 

 Eoyale, I. 1909. 



Ephydrinse. 



Parydra, Stenhammar. 



Parydra Stenhammar, Ephydr., (1844), p. 144. 



The single species of this genus is somewhat aberrant in that it has a pointed 

 antenna and teeth on the front femora; in appearance it is nearer to P. pusilla Meig., 

 than to the other more normal members of the genus. 



30. Parydra tuber cul if era, n. sjd. 



Head (PI. 15, fig. 18). Frons, vertex and back of head shining black obscured with 

 yellow pollination on the back, slightly so on the eye-margin and above the antennae. In 



