48 H. C. EFFLATOtlN. 



Mnle and Femaïe. Length of body : 4 — 5 mm. ; ovipositor : 0.9- 

 1.2 mm.; wiiig : 4.5 mm. 



DESCRIPTIOX: — Frons yellow, getting mueh darker towards 

 Lhe base of the auteiinae, where it is dark brownisli and bearing some 

 blackish erect hairs in the middle; in addition the maie only pos- 

 sesses two curions spathulate appeudages at the end of two chaetae, 

 which are silvery-grey in colour; face and cheeks yellow; vertex 

 yellow, somewhat shining, with the oeellar triangle brownish-black ; 

 proboscis and palpi yellow, bristly; antennae with the two basai 

 segments reddish-brown and the third segment usually yellow; arista 

 blackish. 



Thorax black on the dise, very shining, with very characteris- 

 tic light grey markings which are due to a fine pulverulence of that 

 colour; the black shining areas are as follows : the upper margin of 

 the dise, the centres of the humerai calli, the two large upper corners, 

 two small isolated, rounded spots in a straight Une with the suture, 

 two much larger isolated spots below thèse and the two large in- 

 ferior corners; the humerai and prealar calli are whitish, exeept 

 the centre of the former, as stated above, black; the pleurae are 

 whitish and entirely covered with a délicate white tomentum; the 

 mesopleurae possess a tuft of strong erect hairs, which in the maie 

 are blaek and in the female white ; there are also some white strong 

 hairs on the pteropleurae and sternopleurae, but thèse are constant 

 in both sexes; scutellum very shining black like the thorax with a 

 pale yellow band ail round the base which is emarginate on both 

 sides and not touching the extrême base; mesophragma dark yellow- 

 ish-red; the pubescence on the dise and scutellum is short, adpres- 

 sed and shining pale yellow; it is scareer on the black areas, and on 

 the scutellum it is not adpressed ; ail the bristles are black exeept the 

 sep. yellow. 



Abdomen orange-yellow with two reddish-brown bands whieh 

 appear grey owing to a pale whitish pulverulence; the first of thèse 

 bands occupies the lower half of the second segment and the second 

 band the lower two thirds of the fourth segment; the pubescence is 

 fairly dense, short, erect and blackish and on the latéral margins 

 and apex long and bristly; female ovipositor short, broad, flattened 

 and reddish-yellow. 



T.egs reddish-yellow with a row of rather long yellow bristles 

 on the hind tibiae and the hairs on the upper aide of the front 

 femora are black in the maie and yellow in the female. 



Wings characterised by their breadth, the deep curve in Cu 2 

 and by the aeute infcrior angle of Ist M2 eell The wing markings 

 although almost indescribable are nevertheless characteristic, being 



