38 H. C. EFFLATOUN. 



the basal corners which are black; its pubescence is fairly abun- 

 dant, long and entirely yellow. 



Abdomen shining black with extensive orange markings; it 

 is about three times as long as its broadest part, which is usually 

 on the base of the fifth segment, and is very club-shaped as it 

 narrows from its base to the middle of the third segment, after 

 which it rapidly widens to the fifth segment and spreads over 

 the very large genitalia; the second segment has an orange band 

 which is usually well interrupted in the middle and which starts 

 from the side margins near the lower end of the segment, but 

 slopes upwards to the middle .of the disc; sometimes this band is 

 continuous; on the third segment the band is much broader and 

 sometimes slightly interrupted in the middle, and is situated high- 

 er up than the middle of the segment, so that its upper margin 

 is dose to the base of the segment; on the fourth segment the 

 band is very similar in shape to that on the previous one but 

 owing to the larger size of the segment the band is much longer 

 and larger; however, very often the increase of the yellow colour 

 makes the segment appear orange, except for two black elongate 

 spots near the lower margin and two others in the centre of the 

 segment, one of which, small and round, touches the base, and the 

 other more elongate is near the lower margin; on the fifth seg- 

 ment the black portion is reduced to two elongate blackish spots 

 near the basal corners and a fairly broad dorsal line which ex- 

 tends from the base to about two-thirds of the segment and at the 

 end of which, on the sides, are two small, more or less distinct, 

 roundish spots. Pubescence on abdomen rather inconsioicuous but 

 long erect and mostly pale about the basal corners and shorter, but 

 also pale, on the side margins; it is short, adpressed and blackish 

 on the disc. Venter orange and black and the black markings of 

 the abdomen, when seen from below, never quite reach the side 

 margins; pubescence shorter and much less conspicuous than on 

 the dorsum. Hypopygium very large, asymmetrical and usually 

 orange with spots on the sides which may either be distinct (three 

 small ones on the left and one larger on the right) or practically 

 absent; the genitalia, which consisl of a very large ball under 

 the fifth segment, arc continued under the fourth by a pair of 

 large lamellae, which are rather hairy, especially at their apices. 



Legs yellow to orange, quite simple in shape, with darker 

 places which are liable to excessive variations in different indi- 

 viduals. The front pair of legs is usually entirely yellow or orange, 

 but the middle and hind pairs vary considerably, as they may be 

 anything from orange with tiny black bristles on the tarsi, to al- 

 most entirely blackish with tiny yellow bristles on the tarsi; and 



