660 ASILIDiE 



face-knob are less drooping than tlie whitisli ones ; jowls ratlier broad ; chin 

 and jowl-beards dense, whitish or yellowish white or pale orange, and extend- 

 ing half-way up the back of the head ; postocular margins slightly inflated 

 and covered with greyish white dust, while behind them the postocular 

 festoon begins at about the middle of the head because the whitish beard-like 

 pubescence of the lower part merges there into long brownish yellow bristly 

 hairs which are curved a little forwards and downwards and which may 

 extend almost to the upper eye-angles, but more commonly the upper bristles 

 are black and shorter and more curved forward, or one or two smaller black 

 bristles occur close to the eyes near the top ; the postvertical interval is 

 occupied by a long dense fawn yellow or pale yellow pubescence which 

 extends considerably and even almost to the top ocelli ; frons yellowish grey 

 at the sides but darker (though not blackish) on the middle part, and with 

 several almost erect not short black rather bristly hairs on the sides in about 

 two irregular rows, while on the lower part some thinner less erect whitish 

 yellow hairs occur between the black hairs and the eyes ; ocellar space not 

 much elevated, blackish grey, and bearing numerous fairly long erect black 

 bristly hairs ; collar greyish, and beai'ing fairly abundant brownish yellow 

 pubescence on the upper part, in which are about two stronger but incon- 

 spicuous bristles. Proboscis shining black, with short brownish orange 

 pubescence about its tip, and long pale hairs on its underside from the base to 

 l3eyond the middle ; palpi very short and small, bearing some yellowish hairs. 

 AntenniB (fig. 356) dull brownish black ; basal joint cylindrical, hardly longer 

 than the second, and bearing numerous brownish yellow bristly hairs, and 

 usually (but by no means always) with the long stifi' forwards-directed bristly 

 hairs on the underside black; second joint beginning more slender than the 

 first, but distinctly cup-shaped and bearing very short yellowish hairs on the 

 apical half ; third joint strap-shaped but rather attenuated at its tip, or 

 slightly widened about the middle, about as long as the two basal joints 

 together; style shorter than the third antennal joint, with a short almost 

 transverse basal joint and a minute almost hair-like tip, but otherwise equally 

 and moderately thin. 



Thorax whitish grey, sometimes with a tinge of yellow, and (when seen 

 from above) with the usual dark stripes almost confluent so that a blackish 

 brown or brown disc is surrounded by whitish grey stripes but the dark disc 

 has some patches of light grey in it ; middle stripe broad, blackish brown or 

 brown and not much widened forwards, and with its middle dividing line 

 indistinct or even darker and denoted by the abundant bristling on it ; side 

 stripes complete {i.e., the larger piece above the suture apparently connected 

 witi the smaller piece after it) though not nearly extended to the front 

 or hind margin, and slightly shining in some lights ; an anterior darkened 

 patch is blackish and (when seen from above) is distinctly pushed in between 

 the middle stripe and the front part of the side stripes {vide var. below), so 

 that it is divided from the latter by a rather bowed greyish white linej on 

 each side of the middle stripe is a light grey space in front of the side stripes, 

 and by tilting sideways the side stripes can be seen to be divided by the 

 grey suture, but then the prsesutural markings appear to be united ; the dark 

 stripes leave each sidemargin entirely and conspicuously whitish grey and 

 appearing like a stripe extending from the front to the hindmargin, and the 

 dark stripes widen out to the hindmargin and the adjoining sidemargins ; the 

 side stripes seem when seen from behind to lengthen out to quite the fore- 

 margin but only to extend back to about midway between the suture and the 

 hindmargin, after which they are followed by the small narrow awl-shaped 

 dark spots, and the side stripes are separated rather widely from the middle 

 one by pale yellowish grey dusted stripes. Pubescence and bristles not 

 always easy to distinguish apart, but fine pale pubescence occurs on the humeri 

 and the adjacent sides, above the wing-base, on the postalar calli, and (usually) 

 abundantly and unusually long on the hind jmrt of the disc, while short 

 scattered very inconspicuous rather depressed yellow hairs occur all over the 

 disc in amongst the longer black bristly pubescence ; the black bristly 

 pubescence (as distinct from the regular bristles) is long, dense, and rather 

 mane-like down the front part of the middle line and continues (though 

 shorter and less abundant) between the dorso-central bristles right through 



