152 Records of the I vidian Museum. [Vol. IV, 



usually prolonged very distinctly to the fourth segment, appearing 

 on the fifth as an indistinct spot, the sides of abdomen white with 

 white hairs, the pubescence on dorsum black, white on the stripes. 

 Under side reddish yellow or darker, covered with gre^^ tomentum. 



Legs reddish yellow, the femora more rusty reddish, often ap- 

 pearing darker owing to the black hairs situated chiefly on the upper 

 sides, in some specimens the middle and posterior pair are blackish 

 covered with gre}^ tomentum, the pubescence is always predomi- 

 nantly whitish ; on the coxae it is white and on the tibiae with black 

 hairs on the upper sides, the tarsi reddish brown with black pubes- 

 cence. Wings hyaline, stigma yellow, veins reddish. Halteres 

 yellow or brow^n with lighter knob. 



In a specimen from Malacca the fore coxae and femora are shin- 

 ing black with grey tomentum and wholly white pubescence. 



o^ . These are all reddish brown in colour of abdomen ; in 

 Tahanus sinicus & type and another specimen from Calcutta, the 

 femora and the greater part of the fore tibiae are blackish. The eyes 

 are as Van der Wulp describes them, but the large facets are 

 yellowish green in colour with a large brown band across the centre, 

 only in the type of Tahanus sinicus, is this not apparent. The 

 males vary from 12 — 20 mm. in size. 



Tahanus dorsilinea, cf , said to be nearly related to Tahanus 

 striatus in the description but much smaller and different, has 

 been long placed as a synonym and apparently correctly, though 

 I have never seen a specimen of Tahanus siriatus with " segmenta- 

 tions of abdomen widely ochre- yellow," as Wiedemann describes. 

 His type came from E. India. 



Tahanus sinicus, a' , from Hongkong, has rather darker legs 

 than usual, measuring 20 mm. length. 



Tahanus tenens, 2 , from India, has legs rather paler than 

 usual. 



Tahanus megalops, a* , from Java, is more reddish in colour 

 than usual. 



Tahanus parfMus, $ , from Singapore, has the femora rather 

 darker than usual. 



Aty lotus macer, a* , from India is labelled as Aiy lotus niicro- 

 loma, but from the description it is evidently the type of A. macer ; 

 it is a small specimen in very bad condition, as remarked by Bigot 

 in his description ; it appears to be a small specimen of Tahanus 

 striatus, the three stripes clearly visible though Bigot speaks of two 

 only. The type of Tahanus rufocallosus is from Java, nearly all 

 the legs were wanting when described, the abdomen is partly des- 

 troyed which accounts for Bigot describing the median stripe as 

 ending on the third segment ; in reality it appears to end on the 

 fourth segment, as the fifth is incomplete ; the fore femora are 

 rather darker than is usual. 



Tahanus manilensis, ? , is apparently from the description a 

 specimen of Tahanus striatus, with the side stripes indistinct and 

 the legs rather darker than usual ; it is described as from Manila. 

 Length 13 mm. one specimen only. Tahanus chinensis, Thunberg 



