LAMB— DIPTERA : LONCH^ID^, SAPROMYZID^, EPHYDRID^, ETC. 327 



top view the head is mainly of excessively shining black which forms an area bounded 

 forwardly by the pollination over the antennae and sideways by the eye-margins, but 

 extending in a triangular shape from the vertex almost down to the neck where the 

 boundaries are formed by two elongate excessively pollinated patches. The ocelli are 

 nearly in the centre of this shining area. The face and jowls are also shining black with 

 a neatly distributed sparse white pollination ; in front view this invades the frons above 

 the antennae. Hind head swollen as are the eye-margins except just at the centre of the 

 hind margin of the orbits. The sides of the head behind are also well pollinated. Tongue 

 with dark grey chltinous basal part clothed below with fine white silky hairs, the distal 

 part horny, the tip with a few small teeth. Palpi linear, yellow. Antennae black, the 

 arista thick for the first two-fifths, of the next portion the proximal half is finely 

 pubescent on the top and the distal half is bare ; third joint oval with a remarkable 

 pointed tip. 



Chaetotaxy normal ; two fronto-orbital bristles, ocellars, inner and outer verticals ; 

 a fine but long bristle projects from each side of the facial eye-orbit and is succeeded by 

 side rows of eight to ten fine hairs along the lower eye-margins ; the pi'ojecting prelabrum 

 is the same colour as the face. 



Fig. 16. Parydra tuherculifera, n. sp., wing. 



Thorax and scutellum shining black with a very neat sparse yellow pollen, two 

 shining patches over the wings and each side of the base of the scutellum. One pair 

 of dorso-central bristles, other bristles normal but the achrosticals very fine and indistinct ; 

 pleura grey owing to pollination. 



Wings as Fig. 16, finely ciliated all round the margin, thicker on the first costal 

 segment ; veins brown ; no paler or transparent " windows " or patches present. 



Halters orange. 



Legs bright orange yellow, except the last tarsal joints which are black and finely 

 haired, the hairs being stronger on the hind tarsi and on the last joint of the other tarsi. 

 Front femora with a row of tubercles starting at the centre (PI. 15, fig. 17), where the 

 femur is thickened, and forming a row of blunt saw-teeth from there up to the insertion 

 of the tibia ; between the tubercles are fine hairs ; middle femora ciliated below. 



Abdomen. Shining black with sparse pollination ; the margins of the segments 

 paler, yellowish and less shining. 

 Size about 2 mm. 



Locality. Seychelles. Mahe : marshy ground near sea-level at Cascade, 20. H. 

 1909. 



SECOND SERIES— ZOOLOGY, VOL. XV. 42 



