44 STEPHID.^;. 



36. Chilosia plumbiventris, Brun. 



Chilosia jdumbiventris, Bnmetti, IJec. Ind. Miis. xi, p. 205 (1915). 



$ . Head : frons and face shiniug aeneous-black, almost with 

 a deep indigo tiuge, tlie frons widening graduall_y from vertex to 

 about one-third tlie width of the head above the antennae ; frons 

 slightly prominent above the antennae from eye to eye, giving 

 the appearance of an elongate transverse callus ; above tliis callus- 

 like prominence is an oval, yellowish-grey dust spot on each side 

 touching the eye-margins ; frons, except the dust spots, wholly 

 covered with thick black hairs ; face shining black, the central 

 knob large and prominent, the mouth-border but slightly produced, 

 very narrowlj- orange ; a little almost microscopic pubescence at 

 the sides of the mouth, but not extending just below the eves. 

 Eye-margins distinct, grey, widened immediately below antennal 

 prominence, and on this wider part on each side of the face are 

 three elongate notclies as though impressed with a knife. 

 Vertical margin, occiput and lower part of head aeneous-black, 

 but the facial eye-margins are continued narrowly round the 

 eyes to the vertex, bearing a fringe of yellowish-grey liairs, and 

 similarly coloured hairs also cover the lower part of the head below 

 and behind the eyes. Antennae with first two joints brownish- 

 yellow, ;jrd large, broadened, rounded, darker and duskier brown; 

 arista concolorous, bare. Thorax dark aeneous -,black, shining, 

 covered rather closely with very short brownish-yellow pubes- 

 cence, which, viewed at a low angle from in front, appears uniform 

 and continuous over the whole dorsum, but viewed from behind 

 appears to form three longitudinal stripes, the median one 

 narrowly divided in the middle and attaining the front margin, 

 the exterior ones foreshortened ; sides of thorax concolorous, 

 with very sparse and short brownish-yellow hair. Scutellnm 

 concolorous, with short bi'ownish-yellow pubescence and a single 

 pair of well separated apical long black bristles. Abdomen shining 

 lead-colour with almost microscopic pale yellow pubescence ; a 

 dull black broad band, half the length of the segment, on the 

 hind margins of 2nd and 3rd segments, narrowed to a point at 

 the sides of the segment and very slightly notched in the middle 

 in front ; these transverse black bands are best seen from behind. 

 Legs dark reddish-brown; femora with a moderate amount of 

 pale yellow pubescence ; extreme tips of all femora, basal half of 

 all tibicB, tips of middle tibiae and first three joints of middle tarsi, 

 brownish-yellow, the posterior margins of these three joints 

 blackish. Under sides of fore and hind tarsi with golden-brown 

 pubescence. Wings very pale grey ; stigma pale yellow ; halteres 

 bright orange. 



Length, 8 mm. 



Described from a single $ in the Indian Museum from Simla, 

 7. V. 1910 (Annandale). 



The shining lead-colour of the abdomen will easily distinguish 

 this species. 



