EMPEDA. 475 



Genus EMPEDA, Os. Sac. 



-Empeda, Osten Sacken, Monog. Dipt. X. Amer. iv, p. 163 (1869). 

 Ilisophila, Rondaui, Dipt. Ital. Prod, i, p. 180 (1856). 



GENOTYPE, E. stigmatica, Os. Sac. ; by original designation. 



Closely allied to Gonomyia, Mg., but differing from it in the 

 following particulars : 



Marginal cross-vein present, but, owing to the shortness of the 

 anterior branch of the 2nd longitudinal vein, it is not this branch, 

 but the petiole of the 1st submarginal cell which the marginal 

 cross-vein connects with the 1st vein. The cross- vein is thus 

 placed between the origin of the 3rd vein and the fork of the 2nd, 

 nearer to the former than the latter. The auxiliary vein is longer, 

 extending distinctly beyond the base of the 2nd vein for some 

 distance, instead of ending about opposite that point, as in 

 Gonomyia. When the discal cell is open it coalesces with the 

 2nd posterior cell, not the 3rd, showing that it is the posterior 

 branch of the 4th vein that is forked, and not the anterior one, as 

 is the case in the preceding genus. The male genitalia are of 

 different construction.* 



Range. Europe, North America, Greenland, Java, and India. 



Although closelv allied to Gonomyia, this genus should not be 

 difficult of identification, the most conspicuous characters being 

 its longer auxiliary vein, the presence of the marginal cross- 

 vein, and the forking of the posterior, not anterior, branch of the 

 4th vein. 



342. Empeda inconspicua, sp. nov. (PI. IX, fig. 10.) 



<5 $ . Head : occiput light grey. Proboscis and palpi dark 

 yellowish brown. Scapal joints of antennae large, black ; flagellum 

 dark, the joints narrow and elongated, practically bare except for 

 a single hair on each side of each joint. Thorax : dorsum dark 

 mouse-grey, sometimes tinged with brown ; a pale yellow line is in 

 some specimens rather conspicuous just below the grey colour of 

 the dorsum ; sides of thorax brownish yellow : pleurae a little 

 bluish, with microscopic grey dust. Scutellum rather bright 

 yellow, dorsum more or less darker : metanotum blackish. Abdo- 

 men : dorsum dark brown, a little paler on the belly ; short 

 sparse gold hairs dorsally and ventrally. Genitalia of the male 

 large and conspicuous, yellow, hairy, consisting of a pair of two- 

 jointed claspers and. apparently, two pairs of considerably smaller 

 ones. Ovipositor of the female normal, of moderate size, brownish 

 yellow. Legs brownish yellow, darker towards tips ; coxae com- 

 paratively shorter than usual, the trochanters being longer than 

 usual, nearly as long as the coxae. Wings clear, iridescent. 



* According to Osten Sacken, who, however, never critically examined' th 

 in a living specimen, they are of more simple structure than in Gonomyia. 



