564 THEREVID.^ 



Abdomen black, with yellow Mndmarginal hems to the segments and 

 with inconspicuous dark ashy grey cross-bands ; the yellow hindmarginal 

 hems are fairly conspicuous on the second to fifth segments but each one is 

 slightly narrower than the preceding one ; the grey cross-bands appear to be 

 brownish grey in some lights or light grey when seen sideways, and the first 

 one almost covers the basal segment, but on the subsequent segments each 

 band is placed close against the yellow hindmarginal hem and the anterior 

 portion of the segment is left black j, on the second segment the grey band 

 is ill-defined but occupies at its middle about one-third the length of the 

 segment and gradually widens outwards until it occupies fully two-thirds of 

 the sidemargins ; on the third segment the grey band is narrower at its 

 middle but widens outwards until it occupies almost all the sidemargins ; on 

 the fourth segment the grey band is broader and in some lights occupies at 

 its middle about half of the segment and widens outwards until it occupies 

 almost all the sidemargins ; on the fifth segment the grey band occupies 

 about two-thirds of the segment at its middle and almost all the sidemargins, 

 and on the sixth segment it is still wider, while the seventh segment is all 

 brownish grey ; the base of the genitalia seems to form a more ashy grey 

 eighth segment. Pubescence dense, fairly long, and slightly tufted on the 

 dorsal ridge when viewed sideways, especially on the back part of the second 

 segment, and the tufts are caused by the more decumbent shorter pubescence 

 on the basal part of each segment being followed by longer more erect 

 pubescence on the middle part while the yellow hindmarginal hems are 

 bare ; in the specimen described all this dorsal pubescence is black except 

 quite close to the sides (which distinguishes it at once from T. nohilitata), 

 but the dense pubescence all along the sides of the dorsal plates is brownish 

 yellow, and when viewed from behind this pale pubescence extends on the 

 four basal segments slightly up on to the sides of the dorsum. Belly greyish 

 black with broad conspicuous yellow hindmarginal hems, and with rather 

 long erect but not at all dense yellow pubescence ; the contrast between the 

 pale pubescence of the sides and ventral part of the abdomen as against the 

 black pubescence of the dorsum is marked Avhen seen from behind, as the 

 few trespassing pale hairs which creep up on to the sides of the dorsum on 

 the basal segments are practically imperceptible • on the three basal segments 

 there is a narrow yellow hem along the exact line between the dorsal and 

 ventral plates. Genitalia knobbed, rather conspicuous ; upper lateral plates 

 comparatively small and bearing a moderate number of mainly black hairs 

 but with some tawny hairs intermixed about their ends, where they form a 

 semicircular emargination through which uprise two rather small greyish 

 black -brown lamellce ; latero-ventral plates rather large and subquadrate, 

 greyish black with some rather inconspicuous black hairs about their base 

 followed by a large number of conspicuous long tawny hairs which project 

 out beyond the end of the abdomen, while from the hind corners of the eighth 

 abdominal segment a ciliation of shorter tawny hairs extends all across 

 the ventral hindmargin ; when viewed from behind some bright chestnut 

 middle processes can be seen at the tip which consist of a pair of rather 

 long narrow outer lamellae, a pair of shorter inner lamellae, and a rather 

 long middle piece. 



Legs black, but the tibise except just at the tip reddish orange, and the 

 basal joint of all the tarsi except at its tip and most of the second joint of the 

 posterior tarsi rather obscurely reddish orange. Pubescence behind the 

 anterior femora long and dense, mainly black behind the front pair but with 

 some grey hairs on the upper part, and mainly grey on the middle pair but 

 with some black hairs on the lower part ; hind femora greyish black and 

 bearing only a little pale yellow scaly pubescence ; two strong black bristles 

 occur beneath the front femora, four beneath the middle, and about nine 

 irregular ones beneath the hind pair. 



Wings slightly tinged with a smoky hue ; outer veins dark brown and 

 rather thin, hardly intensified when seen from the wing-tip ; costal vein until 

 past the end of the radial vein, all the mediastinal and subcostal veins, the 

 small piece of the radial vein between the origin of the cubital vein and the 

 discal cross-vein, all the stem of the postical vein, and the base of the anal 

 vein, brownish orange ; discal and lower cross-veins clouded brown, as well as 



