2. ONCODES 465 



while other obscure markings may be present ; sometimes the hindmargins of 

 the segments may be obscurely darkened, possibly through the concealed 

 black foremargins of segments showing translucently through the hindmargin 

 of the previous segment. Genitalia in large specimens fairly conspicuous, 

 bearing greyish yellow pubescence all over, black at the base, then followecl 

 by a pair of approximated dark tawny or orange triangular lamelloi above 

 and a thin projecting dark tawny middle piece. 



Legs shining black on the coxae and trochanters and basal three-fourths or 

 more of the femora, but after that dull orange or brownish or bright 

 red brown, or even dark brown on the hind pair, while the knee joints are 

 narrowly darkened on at least the base of the tibise, and the tarsi are more 

 or less darkened dorsally after the basal joint though sometimes not until 

 the fourth or even last joint ; joints of the coxje and trochanters 

 rather brownish ; large specimens have a tendency towards less blackened 

 fi'ont femora and darker hind tibiae ; anterior femora slightly dilated about 

 the middle and the hind femora after the middle, all being rather rugose 

 perpendicularly ; tibiae stout and nearly straight, slightly larger at the tip 

 than at the base ; tarsi thinner than the tibiae, and the joints in relative 

 length being 51234, the fifth joint being rather stout and strong and slightly 

 shorter than the first, with the others gradually decreasing in length ; claws 

 and pulvilli long, entirely projecting beyond the fifth joint ; claws black, 

 curved, dilated at the base ; pulvilli three, the middle one being slightly 

 shorter than the other two, all brown. Pubescence on the femora nearly 

 equal all over, pale but inconspicuous ; on .the tibiae and tarsi short and 

 closely adpressed all over, pale and fairly abundant but very inconspicuous 

 because so short and adpressed ; there is no sign of any bristles, long hairs, 

 or spurs. 



Wings quite hyaline, except that the veins on the foremargin are pale 

 yellowish down to the base of the cubital vein and the basal third of the 

 postical vein is pale yellow ; costal vein extending almost to the tip of 

 the wing ; extreme base of the costal and subcostal veins blackish and 

 slightly swollen," while the base of the costa bears slight pale pubescence ; 

 postical vein only faintly forked towards the discal vein ; sometimes the 

 wings have a faint brownish tinge. Squamae (thoracal) enormous, 

 resembling roughened glass in colour, but usually with a pale yellowish 

 margin, and the whole disc bearing an abundant almost dense though 

 inconspicuous whitish pubescence which is as long as the marginal fringe ; 

 sometimes these squamae appear to have a thickened margin with a slight 

 dai-kening all round just before the margin, while at other times the 

 margin is as vitreous as the disc ; alar squama3 small, inconspicuous, glassy 

 whitish. Halteres rather small, completely covered by the thoracal squamae, 

 bright orange or orange brown or brown. 



? . Exceedingly like the male, but the bone-white markings on the abdomen 

 reduced to narrow lines on the hindmargins of the segments. 



Head distinctly smaller. 



Thorax with slaorter and less abundant pubescence, less punctulate and 

 consequently much more shining black ; humeri and postalar calli brownish. 



Abdomen shining black, less punctulate and consequently more shining, 

 with narrow bone-white hindmai'gins of segments which occupy about one- 

 sixth of each segment but which hardly reach to the sidemargins of the 

 liasal segments until the sixth segment which is half bone-white ; a very 

 short rather narrower seventh segment is often visible and is black on its 

 basal half but bone-white on its apical half, and after this appears a still 

 narrower all blackish eighth segment (= base of ovipositor?), which is 

 followed by a thick short ovipositor ; sometimes the bone-white bands on the 

 fourth and fifth segments are broader and occupy a quarter of the fourth 

 segment and a third of the fifth segment. Belly bone-white with the base 

 and tip black ; incisures darkened narrowly at the middle, but more widely 

 towards the sides. 



Legs less distinctly black, the front femora having only about the basal 

 quarter quite black and the next third obscurely brownish. 



Wings larger and conspicuously longer, paler, and with the blackened base 



2 G 



