584 THEREVID^ 



except on tlie bare underside. Bristles on the front coxae two strong black 

 ones in front near the tip, on the middle coxse two rather smaller, and on the 

 hind pair some small ones in front almost hidden in the long pubescence 

 with one larger one outside on about the middle ; anterior femora without 

 any black bristles (not even any subapical ones), but the hind femora with 

 about six antero-ventral extending over nearly the whole length ; front tibiae 

 more strongly spinose than in T. annulata, there being three antero-dorsal 

 bristles, three postero-dorsal closer together near the middle, and three 

 postero-ventral with a smaller one nearer the tip, besides the apical circlet ; 

 middle tibiae with three antero-dorsal bristles on the basal third and one just 

 after the middle, three small posterior, four postero-ventral, three or four 

 antero-ventral (one just after the middle being the longest, and one after that 

 the smallest) ; hind tibiae Avith four rows of bristles of which the antero- and 

 postero-dorsal rows consist of about nine irregularly sized, the antero-ventral 

 row of about six or seven, and the postero-ventral row of two to four or even 

 five not very small bristles ; all the spines on the tibi^ black, and the 

 posterior tibiae have apical circlets of about six spines ; tarsi with circlets of 

 small sjiines at the tip of each of the four basal joints, posterior tarsi with 

 plantar bristles beneath the basal joint, but the front tarsi almost without 

 them ; " touch-hairs " distinctly visible beneath the front tarsi. Pulvilli 

 obscurely brownish orange, and also the claws about their base. 



Wings with a glittering brownish tint suggestive of Scatoj)haga, but dis- 

 tinctly orange on the costa to the end of the subcostal vein, on the 

 mediastinal vein including the humeral cross-vein, on the cubital vein from 

 its origin to the discal cross-vein, and on the postical vein from its base to its 

 fork ; discal cross-vein and the veinlets closing the discal cell rather 

 conspicuously darkened, as well as the first portion of the upper branch of 

 the postical vein, and to a certain extent the basal part of the upper branch 

 of the cubital fork ; the other veins are black and sharply defined, especially 

 when viewed from the tip of the wing, with a tilt sideways ; fourth posterior 

 cell always wide open because the third veinlet from the discal cell slopes 

 only moderately downwards to the wingmargin. Squamae (alar) rather large, 

 pale glassy yellow but with the base conspicuously blackish : margins yellow 

 with a long pale yellow fringe on the produced part, but witn a short fringe 

 on the part extending thence to the frenum. Halteres orange, but the 

 broadened top part of the stem and the base dark brown. 



? . Differing considerably from the male through the absence of silvery pubescence 

 on the abdomen. Frons at the vertex quite one-fifth the width of the head 

 but widening to nearly half the width of the head at the level of the 

 antennae, entirely covered with yellowish brown dust ; there is a distinct 

 though slight narrow middle channel and also a broad vague depression, and 

 the frons bears very short forwards-sloping black bristly pubescence except on 

 the absolute sides and on and about the broad middle depression, though a 

 f ew_ bristles near the antennae are pale ; a small blackish inconspicuous spot 

 against the eye occurs rather below the middle of the frons on each side, but 

 there is no trace of the usual polished black callus. Face scarcely widening 

 from the antennae to the mouth, quite bare of hairs but covered with yellowish 

 dust, very short under the antennae but sloping straight back at the sides as 

 in the male ; back of the head brownish yellow on the upper part, and with 

 the irregular black bristles which occur well away from the eyes more 

 numerous (about 20) and the postocular row or festoon reduced to about eight 

 similar bristles. Palpi prominent, pale brown, and bearing long conspicuous 

 pale yellow pubescence. Antennae as in the male, but the black bristles on 

 the basal joint shorter. 



Thorax colored as in the male, but with very short recumbent yellowish 

 pubescence and short inconspicuous rigid black bristly hairs which cause the 

 black chae to tactic bristles to show up more conspicuously ; pleurae and 

 scutellum with similar but shorter pubescence than in the male. 



Abdomen light greyish brown with the hindmargins of the second to 

 seventh segments narrowly but obviously yellow, though those on the fifth, 

 sixth, and seventh segments may be more orange ; when viewed sideways a 

 slight brownish shallow arc is visible on the middle of the foremai-gins of the 



