160 STRATIOMYID.E 



little before the discal cell and on its fork which forms the base of that cell ; 

 costal vein at its basal black dilatation bearing golden adherent pubescence. 

 Alar squamse glassy whitish with thick blackish brown margins and short 

 inconspicuous brownish yellow or pale yellow fringes ; thoracal squamae 

 large, yellow or whitish yellow, with dense long almost woolly yellow 

 pubescence all over. Halteres yellow or whitish yellow. 



9 . Resembling the male. Face and frons fully half the width of the head when 

 viewed from in front, and the inner margin of the eyes slightly convex ; frons 

 shining black until near the antennae, coarsely but sparingly punctate and 

 convoluted, i.e. there are three ridges running out from the rimmed ocellar 

 space, one to each eye and one forward to the antennae ; at the front part of 

 the frons a pair of large orange spots begin which dip a little just above the 

 antennae and end there in points rather near each other, but outside drop 

 round the slight antennal prominence widely until about half-way down the 

 sides of the face, and these spots touch the eyes for their whole length, but the 

 shining black middle part of the face steadily grows wider from the antennae 

 to the end of these spots, while after them the face is all black ; pubescence all 

 long and dense, pale brownish grey and slightly upturned on all the black 

 part of the frons, yellowish white and erect all about the antennas, and 

 yellowish white and rather drooping on the face ; middle part of the face 

 bulging and very liable to have the pubescence rubbed off"; between the 

 lower part of the eyes and the mouth-edge there is very little pubescence but 

 a narrow line of whitish dust encircles that part of the eyes and extends to 

 a long narrow orange spot which runs along the border of the eye past the 

 abruptly widened middle part of the postocular collar ; this collar is black 

 and IS almost equally broad except at this abruptly widened middle jmrt, while 

 it bears some of the long straggly greyish yellow pubescence on its lower 

 part, which extends all over the flat part of the back of the head, but the 

 orange spot bears minute adherent shimmering yellow pubescence pointing 

 forwards, and the projected widened part of the collar is shining blacky the 

 postocular collar all above the orange spot bears rather conspicuous minute 

 adherent shimmering whitish pubescence pointing upwards ; right out on 

 the back of the head behind the vertex there is a pair of large orange spots. 

 Eyes with still long but more sparse black hairs ; the purjile band and the 

 greenish sheen can just be traced in certain lights ; facets blackish brown and 

 all small. Antennae as in the male. 



Thorax, pleurae, and scutellum almost as in the male, but the scutellum has 

 usually a rather narrow orange margin between its spines. 



Abdomen very different from that of the male, being more shining black 

 because of the absence of long tawny or grey pubescence ; all the disc on the 

 third and fourth and the middle of the second segments is covered with very 

 short dense black pubescence, but a longer almost white pubescence exists all 

 round the margin and is long and conspicuous above the shoulders, from which 

 it descends in a large triangular patch on the sides of the second segment until 

 at the hindmargin it occupies a third or more of the segment on each side ; 

 on the third and fourth segments a small spot of similar whitish pubescence 

 occurs at each front basal corner, and more such pubescence occurs along 

 each outer hindmarginal third of the third segment, but rather less on the 

 fourth segment, and these last two patches of whitish pubescence sometimes 

 extend considerably on to the disc ; fifth segment with some short taAvny 

 depressed hairs scattered about all over the disc ; the small transverse whitish 

 yellow spot at each hind corner of the second and third segments may be 

 sometimes reduced to a dot, but more commonly is! quite as large or larger 

 than in the male, and occasionally the pair on the third segment extend all 

 down the extreme sidemargins of the fourth segment so as to join a small spot 

 at each hind corner of the fourth segment. Belly similar to that of the male 

 but the bone-white hindmarginal bands are rather smaller, the one on the 

 third segment being at its widest part only about one-sixth the depth of 

 the segment, while the one on the fourth segment is only a very narrow 

 line ; pubescence rather shorter and rather more depressed, more whitish 

 grey. 



Legs as in the male, but the pubescence is whitish grey and consequently 



