H9 



on the fourth segment) ; the three (or sometimes four) terminal seg- 

 ments are black, but the fifth and sixth are slightly and obscurely 

 reddish at just the sides ; pubescence on the dorsum usually black, 

 somewhat dense and outstanding at the sides, and fairly equal all down 

 the sides, but sometimes on the disc with pale hairs on the second, 

 third, and fourth segments just where pale grey flecks occur as in 

 other species. Ventre somewhat paler, being more brownish orange 

 near to the end of the fourth segment, but the basal segment obscurely 

 blackish on at least the middle part, and the second segment with a 

 rather large though not well-defined middle black spot ; the three 

 terminal segments blackish ; the hind margins of the segments with a 

 narrow but rather conspicuous band and fringe which is most con- 

 spicuous about the middle of each hindmargin ; the remaining pubescence 

 all black and short, but on the apical segments rather long and 

 conspicuous, while pale hairs occur on the disc and occasionally almost 

 exclusively. Genitalia reddish brown, two-jointed, large, brownish 

 orange, or which the first joint is almost quadrate, the second joint is 

 somewhat triangular, blackish, nearly as broad as long, and bears 

 black hairs on the sides but has a fringe of incurved pale hairs at 

 the end. 



Length : 14-15 mm. 



This species varies in some few respects in Japanese specimens, 

 and there is no form of bisignatus, but this requires much care, in 

 identification. However, T. tropicus may be distinguished from 

 T. montanus, by the presence in both sexes of the conspicuous tuft 

 of long black hairs on the upper of the vertex, by the long pubescence 

 on the basal joint of the antennae, by the much more pubescent 

 middle tibiae, by the large size, and in the female by the conspicuous 

 black pubescence on the frontal stripe of the head ; from T. dist- 

 inguendus and T. solstitialis by the absence of the conspicuous 

 bright orange abdominal marking, and in both sexes by the three 

 distinct eye-bands ; from 7". licridus, in both sexes, by the normally 



