92 Orthorrhapha brachycera. 



third joint long, about one and a half times as long as the two first 

 together; sometimes the first joint is somewhat brownish. Thorax 

 yellow, somewhat shining, with a narrow, black median stripe. The 

 dorsocentral bristles of moderate length, longer behind, uniserial, 

 black. Further a humeral bristle, a posthumeral, a notopleural and 

 a postalar bristle, all long, black; besides there are some small hairs 

 on the hunieri and some inconspicuous ones in the præsutural de- 

 pression. Scutellum yellow with a blackish middle spot at the base, 

 and with four black marginal bristles, the outermost weak; post- 

 scutellum yellow with a black middle spot. Pleura yellow, meta- 

 pleura with black hairs; the prothoracic spiracles black. Abdomen 

 yellow, shining, with a blackish median dorsal stripe, dilated at the 

 incisures, and with a similar stripe at each side, 

 just at the yellow venter; it is clothed with short, 

 yellow hairs, at the margin of the first segment 

 there are longer hairs. Exterior genitalia large, 

 the lower lamellæ directed upwards, the hinder 

 (forwards pointing) margin obliquely cut and the 

 lamellæ pointed; the upper lamellæ protruding 

 forwards between the lower, the upper, hinder 

 angle drawn out into a small process, this and 

 the upper margin black; below the process there 

 Fig. 29. E.stercorea, jg ^ g^^^ ^^^^^ bearing a long hair; a small 

 male gemtalia. <• .1 ^ ^^ ■ ^^ 



process from the upper lamellæ is generally seen 



between the lower (backwards pointing) edges of the lower lamellæ, 

 it is black at the tip; all the margins of the lamellæ have more or 

 less long, blackish hairs. ^ Penis is curved upwards and forwards; 

 the basal half is thickened, the apex is not specially thin, and there 

 is a small dilatation near it; the ventral lamella is narrowed towards 

 the apex. The legs are yellow, tibiæ very slightly darkened towards 

 the apex, tarsi black at the apex but generally paler in a large basal 

 part; trochanters and apex of the femora with a black point. Legs 

 short-haired, front tibiæ with a few dorsal bristles, posterior tibiæ 

 with none or very small; the ordinary bristles at the femora present. 

 The hairs black or dark brown. Wings somewhat yellowish tinged ; 



^ Loew says 1. c. under univittata, with regard to the upper lamellæ: ,. . . sie 

 hat auch jederseits einen kleinen schmalen, ebenso gefårbten und behaarten 

 Anhang, von dem bei Emp. stercorea keine Spur vorhanden ist." As will be 

 seen the upper lamellæ in the two species are chiefly of the same shape; I 

 think Loew has had no specimen of stercorea with the genitalia in so favourable 

 a position, that they showed the small processes of the upper lamellæ. 



