248 LEPTID^ 



of the female with two broad shining stripes. Abdomen of the female not 

 at all reddish. 



A long thin blackish Ic/meu)no?i-\ike fly. 



(J. Head when viewed from above sliglitly broader than the thorax and pro- 

 portionately long, about three-fifths as long as broad and rather fiat behind 

 and almost so in front ; when viewed from in front tlie liead is fully four- 

 fifths as deep as it is broad at its broadest part, which is rather above the 

 middle of the eyes ; back of the head (when seen from above) but little exca- 

 vated though sunken between the eyes, dull black with a greyish postocular 

 margin on the lower part ; upper part of the frons (not including the ocellar 

 space) below the level of the eyes, but the lower part and the face only slightly 

 below ; frons widest at the vertex (about a quarter the width of the head) but 

 gradually nari'owing down to the antenna, and being there nearly a fifth the 

 width of the head ; face glistening greyish white because of the dense i^ollen 

 which covers it, but otherwise quite bare, nearly as wide as the lower part of 

 the frons and with parallel sides • jowls absent; lower part of the back of the 

 head rather puffed out, moderately shining aeneous black but obscured by grey 

 dust and bearing a rather long light grey pubescence on the lower part, but 

 with darker pubescence on the upper part ; about the middle of the back of the 

 head the inflation dies away and all the upper part is flush with the eyes or 

 even rather hollowed out and without any obvious pubescence ; vertex and 

 frons bare of pubescence but densely covered with minute greyish white down 

 except on and about the considerably elevated ocellar triangle and on the 

 shining black lower third (or thereabouts) of the frons. Proboscis rather long 

 and exserted, jiale luteous to deep orange, and bearing slight pale pubescence ; 

 palpi obvious, dull black, with a long cylindrical slightly pubescent reddish- 

 orange base which lies close along the sides of the mouth, but they develop 

 into a long stoutish prominent dull black bare projecting end. Eyes quite 

 bare, in profile almost semicircular Avith the back part nearly straight ; 

 facets all rather large but those on the front part largest. Antennte (fig. 180) 

 less than one and a half times as long as the head, dull blackish broAvn ; basal 

 joint long and cylindrical, nearly four times as long as the slightly transverse 

 second joint, and both basal joints bearing minute bristles ; third joint 

 nearly twice as long as the basal one (or rather less) and rather stouter, 

 almost equal in bulk for its whole length, and with eight rather indistinct 

 annulations of which the first is the longest and slightly the stoutest ; at the 

 tip of the last annulation towards the outer side there is a small pit ; the 

 third joint ( = flagellum) is distinctly arched. 



Thorax moderately shining black, but the humeri and a broad stripe along 

 the sides of the disc to the wing-base polished, impunctate, and bare, except 

 for a few minute bristles just before and after the suture, and alongside of these 

 polished stripes are other broad dullish minutely roughened stripes which have 

 straight sides but which begin only about half-way between the front of the 

 thorax and the suture, and which extend almost to the hindmargin ; these dull 

 stripes are alsobare of pubescence and vary a little in extent, but next to them 

 ontheir inner sides are rather narrow stripes of pale greyish yellow pubescence 

 (widened out on the shining part in front) which extend as less definite 

 stripes almost to the hindmargin. while on the moderately shining middle part 

 of the thorax there are some more slight short scattered pale hairs which tend 

 to form a broad middle strijje on the hind part because they widen out and 

 unite with the outer stripes of imbescence ; down the middle of the front part 

 is an indistinct short stripe of pale dust which widens out in front but does 

 not extend so far back as the suture ; the middle hind part of the thorax (after 

 the suture and between the dull strii)es) is depressed and is roughened by 

 the jHinctures of the minute pul )escence ; humeral knobs prominent and some- 

 times brownish. Pleura? mainly polished black and bare, but with a very 

 slight nunute ])ale pubescence about the upper hind corners of the meso- 

 pleurse, sternoideurtB, and metapleura" ; prothorax with slight pale pubescence 

 just above the front coxae. Scutellum shining black, but slightly dulled by 

 faint roughening, almost bare and imiumctate, bat Avitli a very sparse short 



