150 MB. E, E. AUSTEX Oy 2fEW DIPTEROrS lySECTS. [Jan. 17, 



Facial tubercle and oral margin pale orange, the remainder of 



the face and cJu'els pale yellow, opalescent. Froiit clothed Mitli 

 short dark pile, tawny poUinose, anterior face of antenniferous 

 projection shining ; a smaller and fainter black spot in the median 

 line posteiiorly, near the apex of the augle formed by the eyes ; 

 ocelligerous tnbercle black, clothed « ith short and i-ather stout 

 black hairs, which curve forwards. Antennee orauge, short, third 

 joint blunt. Sides of the thora.v orange, dull, but becoming brassy 

 below ; two of the narrow leaden stripes are approxiiuated in the 

 median line in frout, and do not reach more than halfway ; the 

 other two stripes, which are slightly broader, are lateral in position, 

 one on each side, aud exteiulalmost to the hinder margin ; besides 

 these there is a faint indication of a hfth stripe, median in position, 

 starting from between the ends of the median stripes, and running 

 to the hind margin of the dorsum ; metanotum greenish bronze ; 

 post-alar callosities orange, shining: the dorsum of the thorax 

 m front and the anterior portion of the pleurte are thinly 

 clothed with yellow pile, which becomes more orange near the 

 l)ase of the wings ; the dorsum near the transverse suture with 

 short brown pile. ScuteJlum ochraceous, with yellow pile below, and 

 dark brown pile round the margin. First segment of the ahdonii'ii 

 yellowish ochraceous, tumid and pale yellow at the sides ; the i"e- 

 mainder of the abdomen rufous ochraceous, with orange-ochraceous 

 markings ; on the second segment these markings consist of a 

 narrow and ill-defined transverse baud close to the hind margin, 

 and of a crescent -shaped band on the posterior half of the segment, 

 convex anteriorly, \\idely separated in the middle line, and taper- 

 ing towards the posterior augles ; the third and following segments 

 are marked by five continuous longitudinal stripes, of which that 

 in the median line is very narrow and not sharply defined, while 

 the intermediate ones are much the broadest and most sharply 

 defuied ; the stripes formed by the ground-colour on each side of 

 the median line are slightly broader than the intermediate orange- 

 ochraceous stripes, \\ bile those between the latter and the lateral 

 stripes are much broader than any of the light-coloured stripes ; 

 on the fifth segment the stripes converge posteriorly. Genitalia 

 small, concealed. Lega yellow, a band on the distal half of the pos- 

 terior femora, not reaching to the tip, and the distal half of the pos- 

 terior tibiae pale brown. Wmiis uniformly suffused with pale sienna 

 colour ; the auxiliary aud first longitudinal veins, and the bases of 

 the follow ing veins as far as the fifth, pale orange : third longitu- 

 dinal vein rather abruptly convex forwards above the distal half 

 of the first posterior cell. 



Brazil, region of the Amazon (Bales) : one specimen. 



This species is apparently closely alhed to BaccJta notata, Lw. 

 (Dipt. Am(n\ Septent,, Cent. vii. 65), from Cuba, and belongs to the 

 group of which BaceJia Uvula, Schin. (Eeise ' Xovara,' 343), Baccha 

 (Sifrjihris) Jkicipenius, "Wied. (Auss. zw. Ins. ii. 123), and BacfJia 

 Uiieata, Macq. (Dipt. Exot. i. Suppl. 139. t. 20. fig. ')). are also 

 members. 



