7. SARGUS 169 



thin arista, whicli is consequently by no means apical ; this arista is about 

 twice as long as the antennae and bears one or two very small plumes near 

 its base. 



Thorax shining green or purplish green, finely punctate, and bearing a 

 moderately dense sloping rather inconspicuous short yellowish pubescence all 

 over the disc intermingled with which are comparatively scarce suberect 

 thin yellow hairs which are four or five times as long as the dense short 

 pubescence ; humeri and a line from them along the top margin of the meso- 

 pleurse to the wing-base orange or obscurely yellowish, and the postalar calli 

 inconspicuously brownish orange ; pleurae with a dull yellow pubescence which 

 is mostly rather long, but is rather short and depressed on the sternopleurae, 

 and which leaves most of the disc of the mesopleurae (against which the front 

 femora usually lie) bare and depressed. Scutellum resembling the thorax in 

 colour and pubescence, but with an inclination towards a narrow inconspicuous 

 orange margin beneath ; metanotum brilliant green, bare on the disc but with 

 thin (but not short) orange hairs round the margin. 



Abdomen shining coppery green, considerably more than twice as long as 

 the thorax, rather club-shaped as the straight sides gradually diverge from 

 the base to almost the end of the fifth segment ; sixth segment less than half 

 as wide as the fifth, and brilliant purple ; the abdomen is not quite so brilliant 

 as the thorax because it is more densely and coarsely punctate, and is tinged 

 in colour by depressed golden orange pubescence ; the ordinary pubescence is 

 orange, long, outstanding, and fairly conspicuous on about the side quarters of 

 the three basal segments, but on this part of the fourth and fifth segments it 

 is shorter and denser, and where the fifth segment slopes round to its hind- 

 margin it is sometimes more reddish oi'ange, and it may be reddish orange on 

 the sides of the sixth segment ; the middle space all down the disc appears 

 to be bare and blackish in some lights, but has very short dense depressed 

 blackish bristly pubescence, and between this and the longer pubescence on the 

 sides there is on the second to fifth segments a broad stripe of short depressed 

 reddish orange pubescence, which widens out on to the disc at each side of 

 the incisures, and which on the fourth and fifth segments tends to amalgamate 

 with the side pubescence. Belly brilliant green, with universal short adpressed 

 yellow pubescence. Genitalia not small, blackish, with two short projecting 

 lamellae ; the genitalia and often the sixth abdominal segment are bent 

 downwards. 



Legs orange ; front and hind coxae blackish, and the middle pair obscurely 

 orange, with the base black ; trochanters with a broad blackish ring ; tarsi 

 with the last three or four (or even end of basal) joints obscurely blackish ; 

 anterior tibiae a little thickened on the apical half, and the hind tibiae with a 

 slight kink just after the middle ; basal joint of all the tarsi long, being almost 

 as long as the tilji;^, and much longer than in the other species. Pubescence 

 behind the anterior femora slight and all yellow. 



Wings rather smoky, with the stigma and its neighborhood slightly 

 bi'ownish. Alar squamae small, glassy whitish yellow with a minute incon- 

 spicuous pale yellow fringe ; thoracal squamae long and rather narrow tongue- 

 shaped, placed close against the squamal angle, orange and bearing rather 

 long conspicuous yellow pubescence all over. 



Usually very distinct from the male because of the beautiful extensive orange 

 markings about the base of the abdomen. Frons rather wide, being about 

 one-quarter the width of the head, and the eyes almost equally separated from 

 the vertex to the mouth ; ocelli equidistant and placed at almost the top of 

 the head, with a channel round them which diverges below them into two 

 channels running towards the large sharply defined conspicuous white spots 

 against the eyes ; the part of the frons between these two channels is brilliant 

 green and is all pubescent and punctate except on the middle, and this middle 

 part (which does not extend to top, bottom, or sides) is bare and polished ; 

 the space between the two channels and the eyes is duller purple and is also 

 pubescent and punctate ; frons slightly prominent at its lower part so that 

 the white spots show up when viewed in profile ; pubescence of the frons 

 fairly abundant, long and greyish against the occiput but black and all 

 pointed forwards down to the lower ocellus, when after a slight gap the lower 



