554 THEREVIDiE 



the basal third ; the front femora have two or three black bristles on the 

 underside, while the middle femora have four or five inconspicuous ones, and 

 the hind femora have about seven inconspicuous ones in a row. 



Wings with a strong smoky tinge which becomes more conspicuous on the 

 upper outer quarter, and this smoky tint tends to form kernels in the 

 marginal, submarginal, and cubital fork cells ; there is a slight clouding all 

 about the base of the first posterior cell, and a more distinct clouding just 

 above the dip in the upper branch of the discal vein, while there is a slight 

 cloud on the basal part of the upper branch of the postical vein • veins thin, 

 brownish black, but rather yellowish on the mediastinal vein, the praef urea 

 and the veins just after it, and on the stem of the postical vein ; when viewed 

 from the wing-tip the veins are hardly intensified but the cloud above the 

 dip in the discal vein extends (though less distinctly) back to the discal 

 cross-vein ; fourth posterior cell sometimes just open, sometimes just 

 closed, and sometimes difi'ering in the two wings. Squamae (alar) smoky 

 blackish orange, with a long blackish fringe on the outer part and a short 

 blackish fringe on the inner and lower part. Halteres blackish brown, with 

 the stem rather paler, 



9 . Similar to T. nobilitata, but with rufous golden pubescence and with more 

 distinct and wider entire black abdominal bands. Frons and face more 

 golden both in ground colour and in pubescence ; black hairs on the jowls 

 under the lowest part of the eyes rather more numerous than in T. nobilitata 

 but not forming a clump as in T. 2)lebeia ; pubescence on the back of the 

 head longer and more reddish orange, and the black postocular bristles 

 stronger, and those out on the back of the head more numerous ; frontal 

 callus a little larger than in T. nobilitata, less emarginate in front, and 

 distinctly wider against the eyes. Antennae with the basal joints golden 

 rather than grey, and the third joint browner and without a pale base. 



Thorax brighter brown, and consequently the golden brownish stripes 

 more distinct especially anteriorly and posteriorly and along the sidemargins 

 and the middle stripes mdened out laterally at their front end ; back part of 

 the thorax and the scutellum golden brownish almost like the stripes ; black 

 pubescence on the disc less abundant, and the depressed pubescence more 

 orange, while the tuft on the metapleurse is conspicuously orange ; prse- 

 scutellar bristles usually in two pairs, but sometimes two bristles on one side 

 and one on the other side, or one out of two bristles on one side smaller than 

 the other. 



Abdomen with alternate orange and black bands, and clothed with reddish 

 orange pubescence ; hindmarginal hems narrow but bright orange on the 

 second and third segments, and very narrow on the fourth and fifth segments, 

 and these hems are preceded by greyish orange bands ; on the second segment 

 the greyish orange band occupies about a quarter of the segment at its 

 middle but gradually widens until it occupies two-thirds of the sidemargins, 

 leaving the anterior part of the segment black ; on the third segment the 

 greyish orange band is more equal and occupies less than half the segment 

 at its middle but widens out to more than half the sidemargins ; on the 

 fourth segment the bands are similar to those on the third but the greyish 

 orange band is not widened at the sides though it is slightly narrowed at 

 the middle, and the black band is more shining ; on the fifth and sixth 

 segments the bands are similar to those on the fourth but the light colored 

 bands are slightly more greyish and occupy more of the segment, so that the 

 shining black basal bands occupy less than half each segment or are some- 

 times reduced to a narrow basal margin ; the seventh and eighth segments 

 are shining black with no reddish tinge beneath. Pubescence less dense than 

 in T. nobilitata but longer, more erect, and more conspicuous, besides being 

 rufous orange ; it forms a conspicuous fringe on the hindmargin of the basal 

 segment, and is fairly abundant on the greyish orange parts of the abdomen 

 but is more sparse or even absent on some parts of the black ground colour ; 

 the erect stubby bristles on the fifth and sixth (and to a small extent on the 

 fourth) segments are a little longer than in T. nobilitata and are more 

 extensively black, being almost wholly black on the sixth segment, and 

 form little fringes on the actual hindmargins of the fifth, sixth, and seventh 



