1. THEREVA 559 



Winces distinctly tinged with greyish brown or ahnost reddish or brownish 

 yellow about the base and f oremargin ; stigma brownish or brownish jrellow ; 

 veins dark brown, thin, and not intensified when viewed from the wmg-tip, 

 but the costal, mediastinal, subcostal, and stem of the postical veins pale 

 reddish or yellowish brown ; the veins have no dark clouding except slightly 

 on the portion of the discal vein between the end of the discal cross-vem and 

 the end of the discal cell just above the outer upper angle of the discal cell, 

 and sometimes slightly on the cross-veins and at the fork of the cubital vein 

 Squamae (alar) smoky yellowish or brownish glassy ; margms brown and 

 rather thick ; fringe short and yeUowish on the upper curve of the margin 

 but longer on the lower part. , , .^ 



Halteres brown, with the knob paler on its upper part. 



Agreeing with the male in general characteristics, but the depressed orange 

 pubescence giving it a golden appearance. Frons (fig. 321) pale brownish 

 orano-e but varying from brownish orange to light yellowish ashy grey, and 

 with\ 'moderately large shining black callus across the middle ; pubescence 

 on the anterior part black and by no means short but with a narrow band 

 of yellow hairs right across just above the antennte, the black hairs 

 form a weak band which does not quite extend to the eyemargms and 

 not at all into the anterior emargination of 

 the callus, though sometimes they are more 

 abundant and may extend down as far as 

 or even slightly farther than the antennae ; on 

 the upper part the black pubescence is shorter 

 and much more scarce except about the sides, 

 and stray yellow hairs may occur just above 

 the callus ; the shining black callus is practi- 

 cally bare and extends across the frons almost 



from eye to eye, and is not nearly so large as ^ „, -^.. s^x^^ 



in T. pleheia as it seldom occupies a third or ^^^^Miil^M^ilVM ^ 

 even a quarter of the length of the frons and '^^//^^^'W '^.'^l^l 



never extends at all near the lower ocellus even ^^^ 321.— r^crraa nouutata ?. 

 though looped upwards at the middle, while it x 16. 



has a deep notch in front. Face and lower ,■, t a 



part of the back of the head whitish yellow; pubescence on the face dense 

 but not very long, all yellow without any admixture of black Hans 

 Cthouo-h I have seen one specimen in which about two black hairs occuriea 

 on each side and in that specimen the black frontal pubescence was unusually 

 extended) : pubescence below the eyes also yellow but usually with one or 

 two black hairs intermixed, though with no approximation to a clump 01 

 black hairs ; lower part of the back of the head with pale yellow pubescence 

 which becomes longer and denser towards the back part and amalgamates 

 with similar pubescence on the prothorax and on the anterior part ol tne 

 front coxae, but the upper part of the back of the head becomes pale brownish 

 orange and bears brownish orange pubescence besides the postocular testoon 

 of about fifteen black bristles and the usual bristles in two irregular rows 

 quite out on the back of the head. Antennae dark greyish on the two basal 

 ioints but dull blackish brown on the third joint, though the end ot^ tlie 

 second and the base of the third joint are usually ff ^'^f ^^u^ ' °^'7,J.°lr 

 with the usual rather long black bristles on the apical half and a tew bust y 

 hairs on the basal half which may be black dorsally but longer and mainly 

 yellow on the underside ; second joint with the usual short black bristles 

 and the third joint sometimes with some tiny black dorsal bristles near 



■l-j-Q |-jQ DCl , 1*1 



Thorax light greyish brown with two faint narrow pale stripes which 

 are wide apart and often only visible in certain lights; pubescence all over 

 the disc in good specimens composed of depressed almost scale-like liairs 

 which are not dense enough to obscure the ground colour, and of almost equally 

 abundant though very inconspicuous suberect longer_ black hairs • pieur^ 

 light ashy grey and bearing abundant longer pale greyish yellow pubescence, 

 metapleural tuft almost orange on the upper part and composed of even 

 still more dense and long hairs. Scutellum with very few erect black hairs. 



