LAMB— DIPTERA : LONCH^ID^, SAPROMYZID^E, EPHYDRID^E, ETC. 309 



Head (PI. 15, fig. 7). Frons dull, whitish yellow, a slightly darker indistinct stripe 

 extends from the vertex to the base of the antennse. Face white. Back of head yellow 

 behind the vertex, blackish behind the eyes ; below the yellow part are two silvery dots 

 with black bristly hairs on them. Chsetotaxy normal, but the post-verticals long and 

 crossed not merely convergent. 



Antennse yellow, slightly darkened inside at the tip ; arista brown at base with black 

 flagellum, long haired on the top with about 15 rays, shorter rayed below. 



Palpi black ; tongue pale. 



Thorax. Dorsum pale brownish white with two broad brown stripes extending from 

 just above the shoulders over dorsum and over scutellum where they are confluent, so that 

 the scutellum may be said to be brown with whitish sides. Between the two brown dorsal 

 stripes is a whitish stripe, all three being of approximately equal breadth in front. 

 Chaatotaxy normal with three dorso-centrals ; the achrosticals are arranged in eight 

 roughly parallel and ecpiidistant rows of equal sized bristles. Pleurae yellowish white. 



Wings as Fig. 3 ; spotted, with yellow veins. 



Halters yellow. 



Fig. 3. Sapromyza striata, n. sp., wing. 



Legs all yellow. Front : femora with conspicuous rows of spines on the lower and hind 

 sides. Middle : femora with a row of five spines on the front side at the tip ; tibiae with 

 a crown of spines at the tip. All the legs have the usual covering of small bristly hairs. 



Abdomen. Yellow, the boundaries of the segments edged with black, the edging of 

 all but the third segment being marginal, that of the third somewhat remote from the 

 margin. A black and slightly interrupted median line runs along the dorsum of the 

 third to the fifth segments joining each transverse black line to the base of the segment. 



Size, excluding the antennae, 4£ mm. 



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

 Mare aux Cochons and forest above, IX. 1908. Mahe : high damp forest between Trois 

 Freres and Morne Seychellois, about 1500—2000 ft., XII. 1908. Praslin : Cotes d'Or 

 Estate, XL 1908. Felicite : forest, XII. 1908. 



Note. This species must be closely related to Lauxania (Sapromyza) bilineata 

 Speiser, Wiss. Ergebnisse d. Schwed. Zool. Exp. nach dem Kilimandjaro, Dipt. p. 173. 



The next two species are structurally very similar as regards shape of head, nature of 

 chaetotaxy, size, etc. The principal difference is in the antennae. 



