504 BOMBYLID.E 



clothed with dense coarse brownish orange pubescence, which grows paler 

 on the lower part and includes no trace of long black hairs but forms a 

 distinct short cropped collar against the longer paler pubescence of the 

 thorax ; vertex greyish brown, moderately elevated, and bearing a tuft of 

 long (though not so long as in the other British species), mixed tawny and 

 black hairs. Proboscis dull black, about as long as from the tip of the 

 face to the tip of the scutellum. Eyes touching for about as long a space as 

 the length of the vertex, and about equal in size from top to bottom. Antennae 

 dull blackish brown, longer than the head ; basal joint linear, about four 

 times longer than Avide, and bearing (except at the base) long pale pubescence 

 beneath but comparatively short dorsal pubescence ; second joint slightly cup- 

 shaped, and bearing only very short inconspicuous bristly hairs ; third joint 

 strap-shaped, slightly widest about its niiddle, not absolutely Ijare, and with 

 a few imle scales on the ujiper side just before its middle ; style very short. 



Thorax dull black, but obscured by very dense long level (though rising 

 into a sort of crest on the front part) tawny to almost whitish pubescence ; 

 seen from above the ground colour is not much obscured on the disc though 

 the conspicuous brownish tawny pubescence obscures all the front part and 

 sides, while the long radiating hairs of the fans between the wings and the 

 scutellum are pale yellow ; seen from in front or sideways the dense 

 pubescence appears mainly soft pale yellow or brownish yellow with the front 

 quarter (including the crest) whitish yellow ; seen from behind it appears 

 browner ; no black hairs occur anywhere but at least two rather strong 

 reddish orange praesutural bristles can be traced ; pleurae with almost equally 

 dense but rather paler pubescence like that on the fore part of the thorax 

 and on the lower part of the back of the head. Scutellum with pubescence 

 similar to and merging into that on the disc of the thorax, and with scarcely 

 any short scaly pale yellow pubescence. 



Abdomen deep black, but covered with dense long brownish yellow or pale 

 tawny pubescence, which is slightly longer than (but not quite so neat as) tluxt 

 on the thorax ; hindmargin of the second segment and its neighborhood with 

 numerous long black hairs extending round over the sides so as to form an 

 indistinct fascia, and the third segment with similar but rather less numerous 

 black hairs, but no Vjlack hairs elsewhere. Belly greyish black. 



Legs dull Ijrownish orange, with the thickened base of the front femora 

 blackish and the base of the posterior pairs slightly darkened ; hind femora 

 with a blackish dot at the tip in front ; tarsi beginning slightly darker than 

 the tibiae and soon growing blackish ; coxae Avith dense i)ale yellow or even 

 whitish pubescence, and the anterior femora with a pale yellow fringe behind, 

 and the hind femora with a little long pale pubescence about the base ; femora 

 almost covered with yellowish Avhite scales ; hind femora with an antero- 

 ventral row of about six or eight long stiff black bristles and with a few 

 smaller anterior and dorsal bristles about the tip ; tibiae and tarsi with the 

 spicules almost as in B. canescens ; pulvilli as in JJ. canescens. 



Wings rather dark brownish all across the base, and this colour slopes 

 indefinitely upwards and outwards to about the end of the subcostal cell but 

 has no defined boundary ; rest of the wing hyaline with a greyish brown 

 tinge ; small cross-vein just before or at the middle of the discal cell ; thick 

 black basal part of the costa as in B. canescens, but vnih shorter and more 

 whitish scales ; alula smoky blackish with a minute pale brown fringe on the 

 outer part and a long conspicuous whitish yellow fringe all along the margin 

 near the base. Squamae (alar) not small, brownish yellow with a slightly 

 darker thick margin on which is a long pale yellow fringe. Halteres brownish 

 yellow, with the top of the knob yellowish. 



$ . Very much like the male, but the wings much less infuscated. Frons at the 

 vertex about a quarter the width of the head, but the eyes gradually diverging 

 until half-way down the face ; frons greyish white and bearing rather dense 

 coarse whitish pubescence which slopes forward, and with the pubescence on 

 the part just in front of the ocelli longer, more erect, and tawnier, but without 

 any glistening scales on or near the frons ; face also greyish white with longer 

 whitish rather coarse drooping pubescence on the upper half even to the 

 sides but not extending far down the sides of the mouth, and with no 

 trace of black hairs ; postocular pubescence scaly and depressed, whiter and 



