498 BOMBYLID.^ 



tawny ; no black or strong hairs exist anywhere on the dorsal part ; pleurae 

 on the upper part with dark rufous tawny pubescence (so dark as to appear 

 blackish until closely examined) extending broadly from the front part and 

 usually narrowing to the wing-base, but not always very conspicuous when 

 the dorsal pubescence is darkish, and below this dark band is a fairly broad 

 white band (not very sharply defined) which extends from the jowls all along 

 the lower part of the mesopleurse until it rises quite up to the wing- 

 base at the back part of the mesojileurse ; after this the pubescence on the 

 jileurae is longer and usually yellower, still dense and sloping backwards on all 

 the space from the postalar calli to low down the pleura ; all the lowest part 

 of the pleurae between and about tlie posterior coxa? are densely black haired, 

 and this black pubescence extends outwards in a rather large deep black 

 patch behind (even perhaps on to the base of the abdomen). Scutellar 

 pubescence merged into that on the disc of the thorax. 



Abdomen deep dull black obscured by very dense long pubescence which 

 is mainly brownish orange, but the sides of the third segment (beginning 

 widely on the fore part but narrowing back to the hind corners) bear black 

 pubescence and form a black fascia across the belly, and when viewed from 

 above the marginal pubescence of this third segment appears darkened, and 

 in addition numerous isolated longer black hairs occur on the hindmargins of 

 the seconclj third, and fourth segments, while on the fourth and subsequent 

 segments similar black hairs are sparsely scattered all over the segments and 

 stand out from the tawny pubescence ; pubescence of the abdomen consider- 

 ably longer than, but not so neatly shorn as, that on the thorax. Belly (when 

 seen from beneath) with four conspicuous large white or whitish tufts 

 which are separated cross-ways by the black fascia (broadest about its 

 middle) and longitudinally by the blackish grey middle line which occupies 

 about the middle third of the belly on about the basal half but less towards 

 the tij:). 



Legs dull orange, but the coxae, trochanters, and base of the femora black, 

 leaving about the apical sixth of the front, nearly the tip half of the middle, 

 and the apical two-thirds (or more on the upper side) of the hind femora, 

 orange ; extreme tip of hind femora darkened in front ; tarsi darkened soon 

 after the basal joint and becoming blackish on about the last three joints ; 

 front coxae with long dense brownish white pubescence, middle pair with less 

 abundant dark brownish pubescence, and the hind pair with blackish 

 pubescence ; all the femora with long but not at all dense blackish pubescence 

 on about the basal half and also thereabouts (or closer to the base and 

 specially noticeable on the front pair) with less erect long greyish pubescence 

 which develops on the rest of the anterior femora into inconspicuous 

 adpressed greyish white almost scaly pubescence, and on the hind femora into 

 similar but more glistening whitish scaly pubescence ; hind femora antero- 

 ventrally with a row of about eight conspicuous rather long black bristles not 

 extending quite to the base, and postero-ventrally with a similar row of 

 smaller black bristles ; tibiae and tarsi with small black spines almost as in 

 B. (Usrolor. Pulvilli and claws almost as in B. dii^color. 



Wings (fig. 290) dark brown or almost blackish brown all across the base 

 (though rather lighter on the alula), and the lower margin of this dark part 

 sloping upwards steadily and determinately though irregularly from the end of 

 the alula to the end of the marginal cell, but extending somewhat downwards 

 into the discal and submarginal cells and as a spot connected with the dark 

 marginal cell about half-way further on in the first submarginal cell ; there are 

 no hyaline or subhyaline spots in this dark part of the wing, but the rest of the 

 wing is greyish hyaline without any dark spots or cloudings ; discal cross-vein 

 before the middle of the discal cell ; the stout black basal part of the costa 

 bearing a few small inconspicuous golden scales in front and behind ; alulje 

 large, with a minute blackish brown fringe which becomes lighter on the 

 outer part, and with a long rather conspicuous brownish orange or dull yellow 

 fringe along- the basal margin. Alar squamai small, brown with a thick 

 darker margin and with a long fringe which may form one of the orange tufts 

 visible behind the base of the wing. Halteres small and very diflicult to trace 

 in the long dense pubescence, dark orange on the stem but the knob dark 

 brown. 



