13. DIOCTRIA 737 



middle which have their tips curving over forwards, while still higher up 

 other black bristles occur which extend to the upper corners of the eyes • frons 

 deeply sunk between the eyes, shining l)lack and practically bare ; ocellar 

 knob consideral)ly elevated ; antcnnal prominence small in area but sharply 

 dehned and with two or three tiny bristles on the points which bear the 

 antennai but otherwise bare and shining black; collar shining black, bare 

 above but with a few black bristly hairs at the sides and beneath. Proboscis 

 shining black with a dark orange projected pointed tip, before which is a 

 tringe ot dark orange pubescence, and with a few longer pale yellow hairs 

 beneath near the base ; palpi black, half as long as the proboscis, and beann^ 

 numerous brownish orange bristly hairs. AntenmB shining black but slightly 

 dusted on the two basal joints ; basal joint hardly one and a half times as 

 long as the second and the third joint about as long as the two basal ones 

 together ; the two basal joints bearing short sparse black bristles : style 

 thick, minutely pubescent. 



Thorax shining black, with two dark grey dusted lines which run down just 

 outside the bright y polished impunctate middle stripe and sometimes with a 

 turd hue down the middle of that stripe, but these lines do not reach to 

 tJie hind part; the middle stripe is bare and impunctate except on the 

 punctate bristly middle line and the broad humeral spaces are also brightly 

 polished and impunctate, but most of the rest of the disc bears minute black 

 bristles or hairs. Bristles fairly distinct and dark lurid orange ; pra3sutural 

 sometimes two, supra-alar four or five, but any on the postalar calli very 

 short. Pleurce polished and bare except on a dusted band of greyish 

 white tomentum which runs across the top part of the mesopleur^ and 

 curves slightly downwards at each end but not at all across the front part 

 ot the sternopleuriB, while another brownish grey dust stripe extends down 

 the back part of the hypopleurje ; the mesopleural band bears slight 

 pubescence which is most obvious on the back part, the prothorax bears slight 

 short inconspicuous dark orange pubescence, and the metapleur^e bear short 

 hue pale pubescence and the usual fan of about six long outstanding yellow 

 bristly hairs. Scutellum curiously roughened. 



Abdomen unicolorous black (unless the intersegmental membranes show 

 up narrowly yellowish), usually contracting slightly from each end to about 

 the third and fourth segments ; pubescence very minute and black, but a few 

 yellow hairs occur towards the sides of the hindmargins of the basal segment 

 C^enitalia inconspicuous, but with a bare polished black dorsal plate which 

 bears rusty pubescence on its sidemargins, and with more noticeable 

 pubescence beneath. 



Legs stout and strong with the posterior femora distinctly clavate, black 

 but pale yellow at the tip of the coxas, on the trochanters, and on the base of 

 the lemora to about a quarter of the front pair,a third of the middle pair, and 

 nearly halt of the hmd pair, while the extreme tip of the femora is brownish 

 orange and the basal quarter (or more posteriorly) of the tibife is orange ; 

 hind tibire rather dilated at the tip; basal joint of the hind tarsi obviously 

 though inconspicuously dilated. Pubescence and bristles normal ; front coxae 

 with dense drooping orange pubescence, and the middle coxse with a little on 

 the lower part ; front femora with one posterior bristle just before the 

 middle, two or three inconspicuous anterior ones near the base and one 

 postero-ventral after the middle ; front tibi« with four or five inconspicuous 

 dorsal bristles, three or four posterior, and a minute furry golden or 

 blackish pubescence on the apical half of the inside and on the soles 

 ot the tarsi; middle femora wdth only inconspicuous bristles (one postero- 

 ventral just after the middle being noticeable), and wdth one or two 

 long thm pale hairs beneath near the base; middle tibije with the usual 

 bristles, two posterior being long; hind femora with long pale sparse 

 pubescence about the base and the usual bristles which consist of an anterior 

 row of about eight and a few postero-dorsal on the basal half; hind tibiae 

 with two or three inconspicuous antero-vcntral bristles, three or four dorsal 

 (two near the base), and three small and one long (at three-(iuarters the 

 length) anterior ; hmd femora and tibite wdth the usual furry pubescence 

 browmish and not very conspicuous ; all the til)iaj and the joints of the tarsi 

 wath the usual apical circlets of bristles ; all bristles on the legs even to the 



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